Document jkw28kYGZBez1Y7Qw8Bp34N9

r.-.rt- -i T?TEARL t BAHT 5 PARI 5 PART 7 BARI 8 QV PART 10 PART 11 ASBESTOS BULLETIN Vol.3- No. 6. i'T oveir.b e r-De c emb e r 1962. Editor". C.Z. Carrcll-Fcrczynski. n n '7 Ti 77 1D rage LINING ................................................................................. 138 asbz3tcs-cl:.z::t.......................................... . . (. c;cf;c-/ -- >w *~_/ J. -- 1 X . . / Oi * 141 1 ^0 ASBESTOS PRICBICN MATERIALS.................................. 151 REINFORCED PLASTICS.....................................................153 ASBESTOS JOINTINGS, SEALING AND COATING COMPOSITIONS................................................................... 154 PLASTIC .MATERIALS AND PIPES.................................. 155 ASBESTOS PAPER MED INSULATING MATERIALS. 158 REFRACTORY FIBRES....................................................... 161 MISCELLANEOUS...................................................................162 REVIEW OF JOURNALS.....................................................163 (C) Copyright, Astex Publishing Co., 1962. ASARCO ALV 0006845 asbestos bulletin 138 fart 1. MINING. CANADA c8 QUEBEC SHIPMENT. FIRST FIVE MONTHS. Canadian Min. -Journal, Sept.,1952, Vol.83, No.9. p.135* Shipments from the Quebec mines of asbestos during the first five months of 1952 were higher than for the same period last year, a rercrt of the Quebec Department of Natural Resources shows. Ccmc=rotive figures are as follows Lav 1952 Five Months 1962 1961 Asbestos - tons 109,114 397,809 272,863- :59 PRELIMINARY REPORT ON BRISEEC 13 LAKE .-.REA. D.P.Gold.Prelim Rec.^uebcc Den-.Nat. Rescur. Get. 3urv. 2r.Dc.470 .uebec 1952 A3besxrs cccurra.r.ces have beer. noted in this area. --~ -7j ~ "~'TT^ --TJ.'>*._Tl '1'r? .tE)Vl* -,r--' ---~ o *'*" ptt- "'""'VC: 1? roT _/ j. ^ d*. - -"t Lri1 j . - _ `UE3IC. R..J.2.S* '^curir.. rr-iliTM. Rst. ^ueboc C-eol.Surv. Er.Dc.469. -uebec 1951. ^ * LTC **. AtiEXD/uTt* - 1 *T-*\"-.T 1-3 p.list.Rssour * Mineral Cccur^r.cos in this area include asbestos. j.'.It*:. ..REj-. ; _.-i .# C. --* jc-*...; Prelim. Ec p. ,ucbcc D.-pt. Nat. nos cur. Geoi ir.Dc.471. Quebec 1962. .-.r. '-sbesT.es deposit mere than 2"CO ft. Ions and with a maximum cut crop width of 200 ft. is being developed by Murray Mining Ccrccraticn Ltd. PRELIMINARY REPORT ON LAC iM-NTJCIE RE;., SHERBROOKE, RICHMOND L ST..N3TE.:D COUNTIES. P.St.Julien, Prelim.Rep. Quebec Jep.Nat.Rescur.Mineral Deposits 3r.No.464, Quebec 1961. Mineral Occurences in this area include asbestos. 573 BRITISH COLOMBIA The Mining Magazine. Oct.1952, Vcl.lC7, No.4. d.226. A writ has been filed on behalf of a syndicate seeking recognition of an option to purchase an 18-claim asbestos property in North Central British Colombia. The syndicate which includes Group Captain Doublas Bader, of London, England, and Messrs'. Robert Dolphin, Charles II. Uunroe and ..lbert 7. Taylor, all of Vancouver, claims that the option issued by Felix Detain, prospector, takes precedence over one held by Nicolet Asbestos Mines. Defendants in the action are Mr., Detain, Conwest Exploration, Cassiar Asbestos, ASARCO ALV 0006846 o ASBESTOS BULLETIN Kut rc-e asbestos and Nicolei Asbestos. Title to the claims has been the abject of lawsuits in British Colombia courts for sons tins. The Supreme Court of the Province granted ownership to Kutcho Creek Asbestos, but the decision was reversed by the Court of .'ppeal, after which the Sunrcne Court issued an order rc-ccgr.i sing "the option of iiicclet asbestos to nurchase the crooe-rty. Ccnwsst Exploration and its associates, Csssiar and Kutcho Creek have apcealed the Court ruling to the Supreme Court of Canada, and until a decision is reached by Canada's highest court, no consid eration can be given to the r.cv; unit of the Lclphin-Badc-r syndicate. (Entire ,bstr-act). U-S.A. C. L^EIENL. ..Ill STC3 10^5 II KAEKET. .-aui 0.horritt.Mining r.~ -------- -''.ca ; T'r C - -7_nr\ icnr' f""' -S. T.1 G: S r X `GXXX5 ; r " r 0 C 011 2 cC n G. _a rC * ) -"crr,. , Q-- v> c ^ yp Cl. C G 3 j 'PC } ->iX P X G \J C 1512. 8, :3c. 9 . pc.26-30, ^ *J -C-d descricticn of horizontal ^csonsnu s c it - 0ns j 0 r 1 c cg ..Hfcc^tcs Co. . ?iZ Ccdcvroocixs xs U3in~ t-iism in xnexr new r.iii. ` 1 c Cil CHE CIINEEELOGY 3? SEEEIHIIHZS. II./ .Xornilev. Zao.Ysos Mineral.Obshch.1 19^ on no. a, 5-o6. - r> r- ~ Y~ r? serpentines represented by chrysotile asbestos, serpephite and antigoritc- are described. They belong to the serpentineferrcscrr.entine class. Chrysotile asbestos occurs in the form of veins having a thickness of 0.2-0.8 cm, rarely 2.5 cm. It is rather brittle. Chemical composition, specific gravity -and optical properties of chrysotile asbe-stos and the other serpentine minerals are given. Thermal analysis has shown that chrysotile asbestos gives endothermic teak at 660-750C., and an exothermic peak at 810-830C. 577 ON AN UNUSUAL VEIN GF TREIIOLITE-ACTINOLITI IN THE "VOLTEI GROUP". A.U.jbcnco. Ann .louseo. Civ. St or. Nat ur, "Giacomo Borin", I960, 71, 27-33- vein of milky tremolite--actinolite, hydrothermally formed was found in formations of chlorite schists. ASARCO ALV 0006847 35STOS BULLETIN. 140 57 U.S.S.R. PATENT 144,008. MILLING OF ASBESTOS FIBRES. S.Ya. Kruglov, & D.M.Mnushkin. (Jan. 27, 1952). AFRICA 579 FEDERATION 0? RHODESIA & MYASALAND. Miner?! Trade Notes, Get. 1962, Vol.55, No.4, F.5. Rencrtedly a large asbestos mine will be opened in the Filabusi district, Southern Rhodesia, by Fangani Asbestos Mines Ltd., a wholly owned subsidiary of Asbestos Investments Ltd. , of Johannes burg,'if arrangements for a R 1.5 million investment are a;'roved by the Feder-l Rhodesian Government (1 Rhodesian pound equals p.bout U.S.jS 2.80). A substantial ore reserve to a depth of 1,000 feet has been reported. Planned production from the Romani Mine is 30,000 short tons of fiber a year. lARAlARD. L 'w , OV . 32, Vol. 55 No. 5 ,cn :: chr"sctile attestcs in 1961 increased to 1,924 short tens, 612 tons mere .n in I960, the highest since 1958. Exports in 1961 totalled / (L ` j hi; n. , c. -- * !5. (1 S. African t -j.s.e i.ic) ^ -- - J. s. c-x d crzi ri o w -> o o oechuanaland 1958/61 r- r- v :or.s. rrcau: ;icn Lxoort 19 5? ~c | C.-.f; a-- aj n'a n^ ,<a;/c" 5r 1,410 1,282 1,924 1,734 1,112 1,849 1,852 The only asbestos producer in Bechuanalend is the Moshaneng Mine about 6 miles west cf Mange, south eastern Bechuanaland, operated by Marlime Chrysctile .asbestos Corn. , Ltd. , a subsidiary of Marble lime & Associated Industries Ltd., cf Johannesburg. Marline has constructed a large modern mill v;hich is currently handling ore containing 2/- Arizona tyre fiber at the rate of 100/300 tons a year. Grade No. 3 constitutes the bull: cf production, but all grades from Crude to No.7 are produced. The fiber is transported by truck to the railway ^t Lobatsi and exported. 581 RE"-' LAYOUT 0? ETHEL A33EST0S NO. 3 SHAFT. P. YMChambers. Rhcd.Min.Eng.Bulawayo 27, Jan.1962, 20-2. The new layout of shaft No.3 at Ethel, and the working method and equipment are described. Illustrations are given. 'I ASARCO ALV 000684-8 T 141 ASBESTOS BULLETIN. 582. THE DIFFERENT AREA, THEIR GE C-. Jouravsky ir. The \,-arious types of SP6S. include asbes-tos ASIA, :c2 CHEMICAL AND X-RAY EXAMINATION OF AN .ASBESTOS-LIKE MINEBAL OG CUBBING IN HINDUEAGH. Tahir Naze L'han et al. Pakistan J. Sci.& Industr.Res., 1950, 3- Nc.l, 36-- 39* . fibrous asbestcs-like mineral frcm Hinc.ubs.gh has been found Co nhrbic of SOX brucite, Mg(OH), AC",- iclcr.ite and at most 10>- 2 .3 506: Ir. vio O ^ * /, p v- - ;ati; ^ pi true: ;e '.vas T-3 ? deci :ositicn enuct ci nsoestos. ,022. P. 0 i r. ah.c ui a, 3h assv; s' _-i S i.f'i'EGB.-. j. 1 :>-G = "5 A iBESTCS OUTPUT IE 1599/ *i~L llin * X2T9 do - CZ 63 . .30 i --9 < Sana da Lf u* ^ a Rkcdesia _ Italy Uyasalnnd m vr .*3 cwszi Z-HHO. Cycrus J a ca n Australia 3r?.z i 1. Finland Bechuanaland India 1959 I960 -- .j -- (in th cusand t ons). 952.9 K a. a - t ,* n1 *~: -SQJ * cs; -x1 ,^,-nco.a-- 176.8 ICc.S 121.5 lh 6.5 15-2 rl. 4 57.0 hi. 2 -- i.. v 47.9 21.2 25.5 28.0 22.5 29.1 27.8 13.1 21.2 20. C 12.4 I5T2 1"-- 5--A -* nn5. 17.1 15.2 12.2 13.2 15-0 8.7 9.6 9-4 1- 3 1.7 1.7 1. 3 1.7 1-5 Total (estimated) 1,509-7 1,508.4 1,712.1 PART 2. ASBESTOS-CEMENT. 586 U.S. PATENT 3,031,365- PROCESS FOR PROVIDING ASBESTOS CEMENT FlPnS V/ITH SOCKETS. G. Llarchioli & G. Gremigni, (April 24th 1952). A belied end is added to the pipe in the green state. - ___________________________ 'i .1 ASARCO ALV 0006849 asbestos bulletin 142 587. 1.1 11IODEBNI SAT ION OF SHEET MAKING MACHINES. Berney, Cand. of Tech.Sc., 3.a.Grazhdanakiy, K.LLEinstler, A. C-. Latsis, G.C. Zauerskhagen, engineers. The technical and economical aspects of the ashestos-cement industry are closely connected with the efficiency of the sheet making machines. Considerable work has been carried out in the Soviet Union and also abroad to introduce new principles for the manufacture of asbestos-cement products. However, the existing type of sheet mo 'ing machines will continue to be used for some time. Therefore, technical improvements of the existing types of machines, parallel with further mechan sation and automation with remarc to their oteraticn, arc cf grea import ,'nce. There has been little kncwle :-re hitherto how to modernise the sheet makinc machin-s f xf this explains the slew technical pro gress in this direction, "urine: the last few years. In this connection we wish to rut forward some considerations and share our experience regarding tne modernisation of the sheet making machines at our Brotsen factory. o oxistir.c asbestos-cement sheet making machines have two e shortcomings : most cf the attempts aming at increasing the ut cf the machines substantially, result in the lowering of Quality cf freshly formed and matured sheets. Another shortr.g is related to irregularities in the fiLm thickness with -9S Iting fluctuations in the product's strength. Various measures applied to minimise the influence of the shortcomings mentioned above, like increased temperatures of the slurry, improved ooening of asbestos, the employment cf better felts, were -already investigated. s. further improvement can or.lv be effected throush the modification cf the machines. The first of the above mentioned shortcomings is closely conn ected with the low capacity cf the machine's compressing part. The structure of the freshly made sheet is disturbed by the removal of water when only one compressing roller is used and high produc tion rate had to be achieved. It has been found that with the installation of a second spring-loaded roller, the same amount of water can be removed in two steps with simultaneous reduction of pressure. A second compressing roller on the machines at the Brotsen factory was first installed in 1955, and later, in .a number of other factories. Six years experience proved that with two compressing rollers the density and the strength of the sheets has increased considerably. ASARCO ALV 0006850 1*3 ASBESTOS BULLETIN. To help our investigations, the Magnitogorsk Metallurgical Insti tute designed and built a special pilot-plant machine with the mesh cylinders 1000mm in diameter and 30C mm wide in order to find out the optimum conditions for a machine running with speeds of 50 m/min and over. Experiments were carried out at felt speeds of 35, 47, 60 and 96 m/min. It was established that at higher felt speeds it was also necess ary to increase the capacity of the machines compressing part in order to eliminate the"disruption of the sheet by the -wrung cut water. Speeds cf 55-60 m/min. required two additional compressing rollers but at still higher speeds, three were necessary. At an eounl 'reduction rate the strength of the fresh and also of the matured sheet :s improved in cro :sr'i on to the felt sceed. ---- = -r the same tim.e it is ..ecessarv to ir.crea.se the concentration of :he slurry in the vats, ic that t.-ie Less of cement with the waters ices r.c 1 r.crf;'h 3 6 " cc c tw 1 .!_y The concentration of .urry in a^-i .-.t speeas si ever ; ,/min. the m cyj.ir.cer cirs-ws inxo v'otav'y movement certain i.c"era e-i t nlurry. Zr orde-^ to ere-- vent it rising uo tt the main couch oiler; it is necessary to 'st1 'n addi'i cr.al couch roller 0 the mesh cylinder. us the optimum felt s-eod must be r:acyrded as ~he- one at which the filtration period last- 1.5-2 sec. the slurry's conce.ntration less v;ill r.ct exceed xhe v.sual 12-14;^ The optimum felt steeds- f~r mesh, cylinders cf 50-1200 mm. diame ter depend on the slurry's conoentration end lies between 51~cO m/min. At high felt speeds -nd increased capacity of the com pressing part, there is nc need for higher capacity vacuum pumps. The technical ceroonel at the Brotsen asbestos-cement factory,in collaboration with the employees cf Magnitogorsk Metallurgical Institute. carried cut the Preparatory work and con\rerted a three cylinder sheet making machine with mesh cylinders cf 850 mm diameter to high speeds. At first it -was decided to increase the felt speed to 50 m/min. However-, in order to increase the capacity of the compressing part, two additional rollers were installed. (Fig.l). Great care was also required to select the springs of appropriate strength for the additional compressing rollers. It was decided to install on the first press-roller two springs with 5-5 turns, 56.2 kg/cm hardness and index 4* on the second - two springs with 4 turns, 95-5 kg/cm hardness and index 3-94. ASARCO ALV 0006851 asbestos bulletin. 144 The diameter of the driving press-roller of the sheet making machine was 270 mm. At increased loadings, this roller showed a tendency to bend. Average figures from a great number of experiments proved an increased moisture content in the middle of the wound sheet, and the specific gravity of the middle portion was also lower by 8.5Tr than at the edges. The calculations showed that the loading of the roller at 41.1 kg/cm causes the bending in the middle up to 1.02 mm. To elimin ate this undesirable bending, the personnel of the factory des igned and made a reinforced welded construction of the driving roller of 150 mm. diameter (Fig 2.). The drive of the sheet making machine consisted of a 14 E-7 electric motor with 735 R/min., a reduction gear with 22.98 ratio and two gears with a number of teeth 4642. The driving roller makes 35 R/min. At a felt speed of 50.4 rev/min. the rotary cutters did not work satisfactorily. To eliminate this a two speed drive was installed for the transporter. v.'ith this arrangement, it received the sheet from the forming roller with one speed and tra.nsfered it to the rotary cutters at a slower spsed. By this means a satisfactory result was achieved. Also a vacuum box with four supporting rollers 'was installed, which were covered on the edges by bands moving together with the felt. After completing these alterations, the machine was put in continuous operation a year ago. The felt speed was set to 50.4 m/min. The concentration in the vats 'was as follows : 15.4:* (first), 11. 1>? (second) and 6`> (third). The temperature of the slurry was 28; the film thickness 0.8-0.9mm. Pressure on the couch rollers was 2.5 kg/cm; and on the forming roller, 41 kg/cm. Vacuum was maintained at 220 mm Hg and the width of the vacuum-box's slot was 201 mm. A shift's production rate was increased by 24-25?' compared with the previous output of sheet making machines taken as a whole in the industry. Cracked sheets, a widely known form of reject in the asbestoscement industry, were also experienced at the Brotsen factory, but after the conversion of the machine to a felt speed of 50.4 m/min. this feature disappeared completely. Cracks did not appear either during the corrugating process or in the hardening chamber. This has to be attributed to the greater strength of the freshly formed sheet, which as our experiment proved, increases with the reduced film thickness to a considerably higher degree than that of the matured product. The higher felt speeds help in raising the out put without increasing, or rather reducing, the film thickness, and by this considerably improving the quality of the freshly formed sheet. This is one of the advantages of the high speed machine. U ASARCO ALV 0006852 14>. ASBESTOS BULLETIN. 588 SOLID LIQUID REACTIONS IN PORTLAND CEMENT PASTES by W.C. Hansen. Materials Research and Standards. June 1962. Vol.2. No.6. p.490. This paper reviews and analyses some of the literature on re actions 'of cement minerals with water. The evidence from this literature points to the conclusion that the cement minerals do net dissolve as such but react as solids with water to form hydrated products which may then dissolve and recrystallize. kPg SULFATE RESISTANCE OF ASBESTOS-CEMENT PIPE by P. '.V.Man ser. and L.R.Blair. Materials Research and Standards. Oct.1962, Vcl.2. No.10, p.828. Laboratory -and Field exposure tests of asbestos-cement pipe indi cate that: 1) the presence- cf free lime in asbestos-cement materials has a direct relationship to the durability of such products when c-xcosec to sulfate environments. 2) the sulfate resistance is greatly improved by reducing the amount of free' lime. 3) auto clave curing of autoclave formulation (including silica) greatly reduces the percent of free lime, and 4) with the combination cf autoclave'curing and autoclave formulation, the type I (regular) cement has a free lin-e content and sulfate resistance about equal to that cf type V (sulfate resistant) cement. ON THE TECHNOLOGICAL FACTORS CF THE INTENSIFICATION OF THE MANUFACTURE OF AS3E3T0S CEMENT SHEET PRODUCTS. E.ii. Kitaev. Stroit.Mat. 1962, 8, No.9, S-I2. The most important technological factors influencing the manufac ture of asbestos cement sheets are; the temperature cf the asbestos cement mass, the thickness of the sheet, the degree cf densificaticn, the rate of formation and the conditions cf hardening. All these factors are discussed in detail using, as an example, the production of asbestos cement sheets containing 14# asbestos and 86# cement (alite, belitc or cement with an increased content of tricalcium aluminate). Tables and diagrams showing the influence of these factors and of other working conditions on the properties of the products and the degree of utilization of machines are given. 591 SOUTH AFRICAN PATENT 62/2076. COLOURED ASBESTOS CEMENT MA TERIA LS. S. A. Et e rni t. Coloured asbestos such as crocidoiite or amosite, having the pro perty of preve-nting the development of moss, lichen and fungi, is incorporated in the surface layer of asbestos cement plates and the like. The inner material preferably contains white asbestos. TI ASARCO ALV 0006853 ASARCO ALV 0006854. U S - ; U . Cu "<i> C O u \c> asbestos bulletin 148 592 ASBESTOS CEMENT PIPES FOR WATER MAINS ARE PRODUCED IN POLAND. J. Budaszewski. Graz. Woda i Technike Sanitarna, 3.962, 2j. No*2* 78-80. A new asbestos cement factory in Szczucin (Poland) is described. T'r.e nrcduction of asbestos cement pipes (using portland cement "msrk 350") is fully mechanised. The capacity of the plant will scon reach 1000 km.of pipes per year. Pipes of a diameter of up to 500 ram. are produced (with working pressures of 5 and 10 atm): dimensions and weights are tabulated. Owing to the very smooth internal surfaces asbestos cement pipes are characterised by much lower friction losses (pressure drop) than cast iron and steel Dices. c lUx'o.Mu -L^ A SBE ST OS-FEEL! LINE, G. Kutikov. Strcit. lat .1962 8 Nc.8, 24-25- n automatic line for conveying asbestos from stores to a plant reducing asbestos cement is described. The line comprises, inter lia. a feed bin, a two-stage screw conveyor, a. vertical bucket 'levator, a measuring error end .a self-propelled hopper car with screw device for unIco.di.ng asbestos. The line is electrically or.trolled. One caerator is needed for an .asbestos cement olant emprising three hcllanders (previously, this work required men). A V/ FACTO :Y FOR THE PRODUCTION 0? ASBESTOS CEMENT ARTICLES T iAVARIA. Gummi-Asbest-Kunststoffe, 1962, 15 > No.9* 876 A new factory was erected at Dettelbach am Nain by Bayerische Fulgurit-V/erke G.m.b.H, (owned by K.A. Oesterheld; at a cost cf 15 mill.DM. Apart from the known Fulgurit products manufactured at present, it is planned to produce in the future high pressure asbestos-cement pipes for water mains. 595 TEMPORARY TECHNICAL INSTRUCTIONS FOR INSTALLING GAS MAINS OF ASBESTOS-CEMENT PIPES WITH A PRESSURE UP TO 5KG/W OUTSIDE OF CITIES, INHABITED PLACES, AND INDUSTRIAL ENTER PRISES. U.S.S.R. Gosudarstvennyi komitet pc delam stroitel'stva. Moskva, Gos. izd-vo lit-ry po stroit., arkhit. i stroit. materialan, 1961, 22p. 596 SEALING THE WAILS OF ASBESTOS-CEMENT PIPES WITH HIGH-POLYMER COMPOUNDS. Y.S. Loginov, E.A. Kashkovskaia & V.V.Tarkhanov. Stroi. trubeprev. (Pipeline Construct.) Febr.1962, 7, No.2 pp. 9-10. 1 ij \ I T'I J ASARCO ALV 0006855 149 ASBESTOS BULLETIN 597 "SINDANYO" A VERSATILE MATERIAL. Gummi-Asbest-Kunststoffe. 1962, 15, Nc.10, 956 and 958. Turner's Asbestos Cement Co.Ltd., Manchester, has recently launched onto the market a series of asbestos-based electrical and thermal insulating materials under the common trade name "Sindanyo". The basic type is "Sindanyo CS 51" which is a mixture of selected and preliminarily orocessed chrysotile fibres and cement; plates ci this material are slightly polished. (Mechanical, thermal and electrical properties of "Sindanyo CS51" are tabulated). A num ber cf "Sindanyo" modifications include materials coated with synthc-tic resins, chlorinated rubber, oils, lacquers, etc. or imrreanated with oils c-r silicon resins. Properties and aDci-iii nations of these modifications are also described. 59c BEHAVIOUR OF PIPES BURIED IN EXPANSIVE CLAYS. G.Massif: CJ. I A - ! RT.T C , Nc5.t--jiltC/-l%e":)\n. _p_Ao-m. .1. 2S8-o1c4. 8.Civil Eng.Proc.Aor.1962, 88, .esoestos cement r.ioc: ising vi c rat mm wire strain c-.-tanes to determine the stresses causes ov son movements cue to seasonal moisture chances and irrigation. E CP ASBESTOS CZioNl. V.M. Gusev .and . i san. tekh. ('Vater Supply and Sanit. T13h AT2NT c9&, n - rvenki J--iUt itu V j. */ N PRODUCTION C? Hatschek, R Hatschek and Hans A plurality of rotary agitators are employed for counteracting preferential aiignement cf fibres on the- web-forming cylinder. 6GI STRENGTH Sc FROST-RESISTANCE CF . 3EZ5T0S-CEMZNT IN RELATION TO Y/ZIGHT BY VOLUME, I.I.Bernei Stroi.mat.(Bldg.Materials) Febr. 1362, 8^ No.2. pp.6-9. 602 GOOD BONDING OF COPPER METALS ASBESTOS-CEMENT PANELS REPORTED. Am.Metal Market. Sept.25,1962, 69, R0.I85, p.13* Anaconda American 3rass Cc. reports the results of a three year exposure test of laminates of copper or its alloys and asbestos cement. The material is intended for use as spandrels and ex terior wall panels. ASARCO ALV 0006856 ASBESTOS BULLETIN. 150 603 BRITISH PATENT 908,125. PROCESS FOR MANUFACTURING ASBESTOS-CEMENT SLABS. According to one aspect of the invention there- is provided a process for manufacturing asbestos-cement slabs, wherein an asbestos-cement web is formed by the super-imposition of a plura lity of asbestos-cement layers between at least cue pair of form ing bands, and by cressurc between at least cne pair of press rclls the formed web being disengaged from all said^forming,bands, ir_T.e-dia.tcly after passage through said pair or the first said pair cf press rclls, and wherein individual, slabs of predetermined leniths arc cut from the web. g7r::pn patmtt :,i OR- ?en. -;t --n , p T''T'3'I' \77T^T?`t) v-ui-.ii.u' .-.Jr.l.ei J ./ iL.-.u .-. we: .othing -rctectir.c against r.ucwear anc. neat radiation consists ~f tnreads leave ns .a carveosile--asbestos cere enve_coeo.. in -urn, with a gra or.it e lay-r (C.~ mm. thick), lose. sheet (0.~ cm) , ; v m r i*> ~ layer (C.j-0.5 .e.m.) and .a cadmium layer (0.1 mm). T 907,181. i; PROVLITHTIS IN AFD relating to Oclumtia-lcuin-crn Chemical Ccrcn. r. w ^ . V. r vs tr.e present invention e-re is provided an electrc_ytec cei_ cerr air.ir.g an anode catieccs with a diaphragm therebetween, s- e d :'ioohmam. co".ore sir:g rsb-sTos clcth impregnated with c. i c~cr "C0'i drying oil 'nc./cr a ter-oivmcr of divinyl benzene, styrene and maleic anhydride. Two convenient methods have been used., Accorb-ins to one method, the oil is arenaIcmonated before contact with the asbestos. According to o.r.cthor method; the --bestes is impregnated eith oil and thororftor the oil is reacted with the liquid chlorine in situ before or after allowing the oil to dry "nd/cr to solidify. 605 FRENCH PATENT 78,581 (Addn. to 1,033,006) ASBESTOS FABRICS. l mon. Asbestos fabrics suitable for the production of clothings, are costed, on one- or both surfaces, with a synthetic resin compo sition comprising anbestos powder and aluminium in the form of dust, metallic pigment, foils and the like. ASARCO ALV 0006857 151 PART 4. ASBESTOS FRICTION MATERIALS. ASBESTOS BULLETIN 607 THE r.IANUPACTURE OF 3RAXE LININGS, by '.V. G. Carroll, British Plastics, August, I960, c.414. After sketching the development and oroduction cf woven asbestos *brke linings, the author discusses moulded broke linings in detail and describes typos of filler and binder used. The wet mix dough nrocess, by which extruded linings, wire-back linings and sheetor linings are croducc-d, is considered as is the dry mix process for fully moulded and post-formed linings. 608 BRITISH ? .TENT 907,836. FRICTION ELEMENTS FOR BRAKES OR CLUTCHES. Raybestos-Manhattan Inc. The ccrr.cc.-i ti on may contain cellulosie fibre of alternatively the blend of '-rg^nic and inorganic fibres. One of the quoted compo sitions i.; as follows - Pibr3s Sulfite Pule .-.sfcestos Fibre 29-51 ) 9.68 ) 39.19. ninder Phenc-l Resin Latex Rubber Solids Sulphur 25.26 ) 7.64 ) 11.5- 1 2.71 ) 48.15/ Flake Granhite 100-mcsh Lead Powder Talc e. 30 ) 5-21 ) 3-14 ) 12.65w 100.00^ 509 - 'EVIE'.V OF PLASTIC BEARINGS. ?. H. Pinchbeck (United Coke & Chemical Co., Ltd.) "/ear - March/April, Vol.5, No..?, p. 85-113. The article covers the theory of friction, wear and lubrication and its application to plastics, design factors with polymer bearings, radiation effects on plastics ^nd application of plastic bearings. ASARCO ALV 0006858 ;.SBESTOS BULLETIN. 152 610 RESEARCH INTO BH'.KC US/iGE IN PASSENGER CARS by A.E.Livsey <$- ethers. Institute of Loch. Engs, Automcbiie Div. , pro ceedings 1960/61. No.7, pp.211-220. Discussion pp.231-253- A study is made of the brake usage of a number of passenger cars with different drivers over four~widely varying routes which are representative of conditions under which brake usage is likely to be severe. 611 A TEST SCHEDULE FOR PASSENGER C*iR 3R.-.K..S by A.E.Livsey & ethers. Inst.cf I5och.En.as. , ..utomebiie Div. proceedings 1960/61. No.7, op.221-230. Discussion pp.231-253- 7-ricus forms of brake-fade test ^re used in the motor industry it is suggested that a standardised test schedule is required, b^sed cr. ccnte-mocr.ary operating conditions. BRITISH ?A!:NT 906,358. EHICTICN Aktie-n.aesells.ch~ ft. ilLS. `gncsia This catent covers a metrod cf manufacturing ceramic friction bodies fer brakes or ceur.lings comcrising plastifying a dry mix - ture including 20 to ,a v 3 h-y weight cf natural or synthetic inorganic fibres, 20'60 50 parts by weight cf glass fri' naving a lew meeting temperature, 10 to n;j c...--irts buyj weight of metal newer mixture "nd/c-r r- metal oxide powder mixture and 0-15 parts by 'weight cf powdered graphite- "nd/cr a powdered sulphide or nitride, and pressing the plastifie-d mixture onto shaped bodies ~t a pressure cf the- order cf 1000 ~-tmosphe-res, the glass frit acting tc bind the mixture together in clace cf ~n additional binding -sent. The rlastifieu mixture- is crossed at a tomceraturc in the r~nge of 5^0C to 650L'C. Zxamrlo cf Ccmccsiticn 3w5n carts by weight -asbestos fibres glass frit 20 sintered iron powder 13 bronze powder 2- molybdenum sulphide. 613 JAPANESE PATENT 11428/62. DRAKE MATERIAL. Nitto Doseki Co. Brake material is prepared by mixing iron powder (35-55?c) lead powder (15-252) phenol resin (10-14/>) Cashew resin or an alkyl phenol formaldehyde resin (8-12c/c) asbestos powder (5-10:/) and graphite (1-5^). The mixture is moulded under pressure with heating at 140-160C. The product has a high coefficient of friction (0.3) '.which is only slightly reduced at elevated te-mperntures. The abrasion of the product is low (only about one third of the abrasion of cast iron). ASARCO ALV 0006859 153 PART 5. AS3ESTOS REINFORCED PLASTICS. ASBESTOS BULLETIN 614 STRUCTURAL PLASTICS FOR CHEMICAL PLANTS. B.N. Reavell. Australian Plastics & Rubber -J., July, 1962, pp.42-46. A wide range of equipment made from Keebush and Haveg asbestos based materials is described ana a table is given showing the resistance of these materials to chemical attack. 615 NON'VCVEN FIBRES IN REINFORCED PLASTICS. D.V.Hosato. (Indust. & Eng. Chemistry).. August, 1952, 54, 30-37. The manufacture and properties of elastics reinforced with non- wcven fibres are described. The fibres used in these composit ions include, inter alia, asbestos fibres, whiskers of metals and ceramics, xraohite and pvrofiber. Ncn,'loven asbestos fibres cro- duce higher strength reinforced plastics tnan the woven fabric rci y forcemeats because of the fineness and wettability of asbestos Pr.wcc '''hiskers whj ch .-hew premise in the field are refractory oxides of A! and Si -nd sc-.s metals (exoscially iron and copper): silicon whiskers 1 micron in diameter croduce strength cf 550,000 strength of iron whiskers at room temperature is retorted as hi as 2 million csi. with whiskers not exceeding 1.5 microns in aiameter. llCvV CV 9 ;le orogress kas been made, as yet, developing whisker-reinforced laminate. Sheets can be mode by both textile and racer rrccesses. gut porT-jp turn7 uc tfiu - (with Asbestos). G.J.Spies 15, No.2, 66-73- NFORCED SYNTHETIC RESINS glastica (Delft), 1952, Although most cf the sandwich-type reinforced resin compositions contain glass fibres, ether fibres such as quartz fibres or asbestos esn be used in synthetic resin laminates. Asbestos may be used on phenol, polyester or silicone resins. Theoretical ana prectical aspects cf the production of such articles are discussed, using as an example the nozzle jackets of Atlas rockets. 617 3RITISH PATENT 908,494. HIGH TEMPERATURE RESISTANT MATERIALS & METHOD OF MANUFACTURE THEREOF. ! In accordance with this invention an asbestos fibre mat was impregl nated vvith a phenol-formaldehyde resin solution containing Resin Solution (656 solids, 355solvent) Solvent (isoprooyl alcohol) Hexamethylene tetraraine 'Vater Graphite Fowder Boron powder (amorphous, about 1 micron) 31.8 lbs 25.1 1.0 1.3 8.0 15.8 ASARCO ALV 0006860 asbestos bulletin. 154 This was cured at 3?0F. It was then fired at 2000F. for one- half hour. On examination, the oroduct was found to have re tained its shape and structure, although it turned black and had become slightly warped. However, it could be handled without breaking or disintegrating. In the absence of the boron, when treated otherwise in the same manner, the product crumbled and disintegrated. 618 ASBESTOS-REINFORCED PLASTICS. J.J.Colao. Mod.Plastics, Sept.. 1952, 0, No.lA (encyclopedia issue), pp.676-677. Uses for these materials are described briefly. *,r\ c "Z ACHINO, SEALING & COATING COMPOSITIONS. Eng. ;e ' GASKETS. E.H.Stubenrauch. Chem. I960 -C Nc.IS, >0.12 3-128. : f. r: 1/ Ui3 o ~ j is ana their applications. `FECTIVZLY. J. J.'Thaien. Chem.Eng. c. 83-88. sis on installation bolt force .es: gn 'r1.O'- IsXliEj . AP-DPS .1. V-'P GRAPHITE Oct.,1962, 55. No 4, p.202. rlasbestcs. a mixture of asbestos f ibres, TPS resin ana graphite, forms its own gasket on packing and will not harden in service. The compound is marketed by Crotc-n Compound Corp., 1133 Broadway Hew York 10. The compound has an upper pressure and temperature limit cf 200 psi and 500'?. Per t temperatures above 500UF, the compound is suoplicd 'without TFE tc take temperatures up to 800P. The material is impervious to steam , hot and ccld_water, and oil, and resists most acids. ASBESTOS-NjiC^-RENi. SHEET. Mat. in Design Eng., Oct., 1962, 55, iTc.4, p.204. Keesby & Mattisc-n, U.S.A., have introduced a new asbestos-neoprene rubber sheet packing material that is available in three densities. 62 3 NEW CARAMICS ADHESIVES. W. ?. Robins. Produce Engineering, 3 September, 1962, p.75-7. A new rangg cf inorganic adhesives for use where temperatures exceed 400 P has been introduced and under certain conditions are claimed to be competitive with brazing. One such application is in tne fabrication of high-temperature honeycomb. ASARCO ALV 0006861 155 ASBESTOS BULLETIN 624 EXTREME SERVICE GASKET MATERIAL. Eng.Mats.& Design. May, 1962, p.321. Victorcor 200 Gasket material, developed in the U.S. is now being made under licence in Great Britain by Cooper's Mechanical Joints Ltd., and is designated C-.130. It has been developed to meet the increasingly exacting sealing demands of present day engines, and comprises a thin steel core with perforated dimples, and a sealing element of a special asbestos-elastomeric compound bonded into the core to form an integral structure. The thin-steel core is formed with the continuous projections alternating in each face, the pene tration of which increases stability and heat conductivity. The material is intended for use where the requirements are high dimensional stability and high heat and crush resistance with excellent torque retention. Diagram. 625 BRITISH PATENT 905,054. Y/ATER-LAID ASBESTOS SHEET. Armstrong Cork Co. The invention relates to the deposition of the rubber content of a synthetic rubber latex upon chrysotile asbestos fibres while in suspension in water, and thereafter forming the resulting slurry of coated fibres into products such as sheets and the like. ><cc BELGIAN PATENT 616,156. SEALING DEVICE FOR ROTARY TUBULAR FURNACES. Huttenwerk Obernausen. A sealing device for rotary tubular furnaces comprising a friction joint member made of, e.g. , a copper-asbestos or graphite asbestos comDosition. The joint may be reinforced with compression springs 627 BRITISH PATENT 906,969- IMPROVEMENTS RELATING TO EPOXY RESIN COMPOSITION. Koppers Comp. Inc. The specified adhesive composition may contain inert fillers such as asbestos and asbestine. 628 U.S. PATENT 3,055,434. ASBESTOS FIBRES IN MINE ROOF COATINGS. William C. & R. Streib, G.James, III (to JohnsManville). The use of asbestos fibres for a coating sprayed on the roof and the walls of coal mines instead of limestone is described. The object is to improve the visibility and to dilute the explosive coal dust by the continuous sifting down of the noncombustible asbestos fines. 1 J T ASARCO ALV 0006862 assestos bulletin. 156 629 BRITISH PATENT 908,749- EPOXY RESIN COATING COMPOSITIONS. Conch International Methane Ltd. This invention relates to coating compositions particularly useful in corsructing containers for liquefied gases such as liquid nitrogen or liquid methane. The following are examples of the coating :- Table 1. O V Al.uraina Alumina N c. /,,1coa Alcoa A-2 A-60 Asbestos Asbestos Asbestos 7 TF 7M 7 T Epoxy Resin Curing Agent. 7 35.5 52.6 4.1 2* 7 10 35-5 45.0 52.6 45-c 4.1 ". ^ 4 7 10 35.5 45.C 52.6 45.0 4.1 ,,5 cs r 1. - r-j PLASTIC 3T'ILIIKC- MATERIALS. 6?G bROSPECT FOR jrl-w3. -.non. British Plastics , A ugus t. 1952 ?.'_c:r.t cublieaticn cf British St~n.lards dealing 'ith unplasticized r.v.c. cico fer ccld v;-tor nc industrial use ha s given the plastics pitc market considerable impetus, enlarging its scope beyond 'veil established usase in the chemical industry/. Th is new sanction, ccnservative opinion estimates. will enlarge the market for these products sixfold by 1965. At this significant stage of development current enc ootentir.l n colicati ons for olas tic pipelines in the J.X. are reviewed, together ":ith some present tr -nas in the U.S.A. oo- VINYL FLOOR COVERINGS S.ISottrnm &: L.R.Anthony. British PLasties, July, 1962. Modem Vinyl floorings have better colour range and greater resistance to corrosion and abrasion than most conventional materials. The authors consider the t:-pes of vinyl floorings available and the factors affecting their formulation, and discuss plant requirements and rotogravure printed flooring"; specifications for p.v.c. flooring are given with particular emphasis on 3ritish Standards requirements. 632 BRITISH PATENT 903,212. WINDOWS & ROOF LIGHTS. E.I.Weidner. Priority 93*60.(Patent of addition to B.P.829,442) Pub. 15-8.52. A specified double-glazed window or rcoflight which may be made of synthetic plastics such as Perspex, nay be mounted in a resin bonded glass fibre frame. 4 I i ASARCO ALV 0006863 157 ASBESTOS BULLETIN 633 A CONTINUOUS METrOD OF THE PRODUCTION OF ASBESTOS-VINYL FLOORIN'! PLATES. P.D.Kutsovol. Stroit .mat, 1962, 8, No. 6, p. 40. A continuous method of the production of asbestos-vinyl flooring platc-s of Congoleum-Ne.irn Inc., (U.5.A.) is described in detail. The plates are made of polyvinylchloride (14/0, waste asbestos,(up to 40fO, Lime oowder (up to 40;--) , dibutyl phthalate (up to 6:0, calcium stearate (IN) and colouring materials (l-5>0 The pro duction is automatic' the capacity of the plant is 7.5 mill.m.2 per year. 634 GERMAN PATFI'TT 1,137,203. PREVENTING THE DISCOLOURATION OF NATURAL -SBESTOS USED AS A FILLER IN THERMOPLASTIC POLY VINYLCHLORIDE Argus Chemical :rpn. The discclcuration cf iron-containing asbestos during the formation cf shaped bodies of polyvinyl chloride masses at elevated temper atures is orovented by picking to the mass an aliphatic or cyclo aliphatic compound which cc-ntrins two or more- hydroxyl groups in a molecule. A typical ccmaesiticn comprises (in parts by weight) : P7C 100, a plasticiser 15-FC, asbestos (e.g. chrysotile asbestos) 2C-2C0, ether fillers 10-200, pigments 0-20, prctc-ctive agent (e.g. pentaosythritol) 1-20. 535 BRITISH P.-.TINT 0 332. building* llei^nts pIk--">QuTl oJrlr.iv .;lT1r-i j J 'LTI-LAYER an Spiegel. 1:1 .*1. "Urt The patented element comprises a primary layer having good thermal insulating properties and composed of mineral fibres bound together by a non-ccmbustible agent, a mechanically strong layer arranged on cr.e side of the primary layer, a refractory asbestos layer arranged on the other side of the primary l^ycr and an external facing layer arranged on the outside of the refractory asbestos layer. C li- PLASTICS IN BUILDING. Australian Plastic L Rubber, May, 1962, pp.35-63* This comprehensive article deals with the following subjects 1. Plastic &; Rubber. 2. Roof ^nd Cciling. 3- v/a11s. 4. Floors. 5. Electric systems. 6. Plumbing (pipes) 7. Sealant &: Cements. 8. Colour & Texture. M ASARCO ALV 0006864 asbestos bulletin 158 637 RESEARCH ON ASBESTOS-ASPHALT ROAD-SURFACING COL5POSITIONS. L.Kasdan (Johns-Manville Corn.) Gummi-Asbest-Kunststoffe, 1962, 15, No.9, 812, 814. A new asphalt-base road-surfacing composition containing 2-37= asbestos fibres lias been tested in 50 localities in the U.S.A. This composition proved to be more durable and resistant to wear and atmospheric influence than normally used asphalt-base compo sitions. ' The composition is especially suitable for jet aircraft runways, heavy-traffic roads, etc. The layer of the asbestosasphalt comoosition can be thinner (e.g. 2.25 in.) than in the case of ether compositions. Details of further research carried out by Johns-Manvilie Corp., are given. 8. ASBESTOS PAPER L IN: MATERIALS. 6 38 ST 1 r 7*7^ / QDNeHAc: " --J. -- *1, IRS ARE FREE FROIL BLISTERS Ivlat. in Design Eng., October, 1962. 56, Ho.4, p.204-206. Asbestos papers that have been treated by a pyrc-lizing technique are said to make excellent ablation materials when combined with phenolic, modified phenolic = r.u other high temperature binders. The 100?< inorganic asoestos papers, called ITovabestos, are marketed by Eaybestos-Iilanhattan, Inc., Asbestos Textile Div. , Mannheim, Pa., In the pyrolizing treatment, the high temperature vaporizes the saturnt which accumulates after manufacture, thus preventing gas pockets and blisters from forming when the paper is in service. 639 JAPANESE PATENT 13184/62. FIREPROOF DECCR..TIVE ASBESTOS PLATjt. T. Sugimotc. A fireproof asbestos plate, or the like, is coated with a mixture of a polyester solution with an acetate ester, e.g., ethyl acetate, and an alcohol, e.g./methyl or butyl alcohol, or xylene. An asbestos paper, having a coloured pattern and soaked with the polyester coating solution, is then applied onto the plate, covered with cellophane and a cushioning pad, and pressed with heating. When the composite laminate is dried, the cellophane and cushioning pad are removed. 640 GERMAN PATENT 1,135,615. PROCESS FOR THE PRODUCTION OF INSULATING BODIES. F. Bohle. Insulating- bodies are produced by mixing together kieselguhr, a rapidly setting cement, clay and mineral fibres, with the addition of water and a foaming agent, forming the mixture to obtain the desired shape, drying and covering the surface of the body with a layer of foamed polyurethane-base material. i 4i ASARCO ALV 0006865 159 ASBESTOS BULLETIN 641 HOW FIFE INSULATION SECTIONS ARE' PRODUCED. Pipes and Pipelines, 1962, 7, No.2, 59-62. New materials for the heat-insulation of pipes, produced by the Chemical & Insulating Co. ; Ltd., Darlington, are "Darlington 85 Suner Magnesia" and "Darlington Paratemp". The chief character istic of 85a Super Magnesia is that instead of being merely held together by the'reinforcing effect of the asbestos fibre content (15;-) it is chemically bonded together; the crystals "grow around" the asbestos fibres to give a product of high mechanical strength, high resistance to vibration and high retention of shape after wetting. Darlington Faratemp is a calcium silicate insu- ..C:iiT1.,n1 r* n intended for a hi, er temperature range than 85a> Super rnesia, 13 inilarly bended together, and has similar character- : i c r . It made from hydrated lime, silious constituents and asbestos fibres. 642 3RITI5H FATINT 862,0;!. RADIATION SHIELDING FOR NUCLEAR EQUIPMENT. John Thcmescn (Nuclear Energy Co.)(Nov.8,1961) Claims are made for nuclear reactor radiation shielding consisting c.f successive layers of lead (gamma-ray absorbent and'nearest to the source cf radiation), boron asbestos or a similar boron-rich material (thermal neutron absorbent), unberated bitumen (fast r.eutrca absorbent) and on the outside a second ,rer of lead. 64 3 U.S. PATENT 3,ON ,727. l-CONTING FOR DOTH CAL RESISTANCE ELEMENTS AND MET CD FOR PREPARING TrZ SAME. George J. & Quinr. A d oms hi ck, G.Robert, (to Johns ianvi lie). (Se pt. 11. ' 62) Beard made cf asbestos, diatomaceous earth, and sodium silicate con taining aluminium phosphate. 644 NEW CABLES WITHSTAND MORE HEAT. INC.Cheney. (Lewis Eng.Co.) Electronics, August 31, 1952, 35, pp.60, 62. Ne-.v insulation based on asbestos and elastomeric materials for signal carriers in miniaturised systems and for power cables are described. They were developed to withstand head and radiation. 645 GERMAN PATENT 1,135,261. PRODUCTION OF FLATES, SLABS AND MOULDING PREPARATIONS CONTAINING BONDED ANHYDRITE POWDER AND CHARACTERISED BY HIGH RESISTANCE TO RADIOACTIVE RADIATION AND HEAT. P. Jolly. Natural anhydrite powder and asbestos waste fibres (in a ratio of from 2:3 tc 3j2) are mixed together 'with 5-10 wt ^ of a metal sulphate, 5-10? sodium silicate, 3-5% hydrochloric and optionally 3-6?; calcium chloride, and alkali-free water is added in such an amount that the mixture is just damp. The mass is then formed, rolled or pressed, and then dried. ASARCO ALV 0006866 ASBESTOS BULLETIN 160 64.6 INVESTIGATION OF THE PROCESSES CF TEE HARDENING OF ASBESTOS-SILICATE HEaT-INSULATING MATERIALS. I.S.Volchek & O.T.Gracheva, Stroit.."at. 1962, 8, No.10, pp. 35-38. Asbestos-silicate heat-insulating naterials are produced by the autoclave crocess from aqueous suspensions of finely dispersed silica, lime and fluffed asbestos with simultaneous or subsequent dry in Silica reacts with calcium hydroxide forming compounds which act as binders, whereas asbestos plays the role of a rein forcing agent. The strength and specific gravity of the products depend^on'a number of factors : the type of siliceous material used (in this case diatomaceous earth and marshallite) its dispersion and the ratio to the lime and asbestos, the amount of water used in the precaration of the pulp, the course of the autoclave treat ment (the pressure was increased to 8 atm during 2 hours, maint ained for varying periods of time, and then released during 1 hour) and the use of the intensification of hardening (NaCl <T CaSO). The best results were as follows : The strength cf the marsnally ite-base material attained 17.2 kg/em2 (9 hours in the autoclave) when the degree of the dispersion of marshallite vjas 8100 cm2/g and the ratio lime:marshallite -.vas 0.75, the amount of asbestos being 20A with the ratio water:ury substance equal to 3'. 'The ,, strength of the aiatcmite-based material was less, e.g. 8 kg/cra . The addition of the intensificators resulted in a considerable increase in the strength of products; vis., 25-30A by adding l-2f. NaCl to the marshallite comocsition and up to 100>; by adding 10/- CaSo, to the diatomitc composition. 17 RUSSIAN PATENT 145,744. PLASTICS DIELECTRICS. S.M. Zhivukhi.n et al. A process for the production cf heat-stable naterials possessing good mechanical and electric insulating properties comprises mix ing a 50$ alcoholic solution of phenol (resol), and butynal-phenol resins with an acetone solution of low-molecular weight polymers cf phosphonitrilo-chlcride taken in an amount of 5-10 wt.$. While mixing the solution, a filler is added, such as glass fibres, asbestos aluminium oxide, powder aluminium metal and other mineral materials. The composition is dried in air, and then pressed at 100 atm. and a temperature of 140-150C for 15 mins. The heating is continued at 140-150C for 6 hours and then at 700C for 10 mins.- ASARCO ALV 0006867 161 ASBESTOS BULLETIN PART 9. REFRACTORY FIBRES. 648. NEW REFRACTORY FIBRES FOR ABLATION, THERMAL INSULA TION. J.P. Sterry to H.I.Thompcr'n Fiber Gla3s C*. , Pdaterials in Design Engineering, Oct.1962, 66, No.4. d. 12. Refractory oxide fibres of both zirccnia (zirconium dioxide) and zircon (zirconium silicate) are now being produced in pro duction quantities. Fibre length at present can be varied from 1 to 12 in.; continuous fibres are under development. Currently the short fibres are available in the form of wool, felt and/or bate, suitable for resin impregnation and moulding. The fibres can be laminated and moulded by virtually any conventional mould ing method. 6^9. PRICES OF CAR3CN AND C-RAPHITE FABRICS AND TBRES. Materials in Design Engineering, Oct.1962, 56, No.4, p.165 Prices of carbon and graphite fabrics and fibres have been cut 5~97- by National Carbon Cc,, a division of Union Carbide Ccrp. The reductions apply to graphite cloth, carbon cloth, and carbon and graphite staple fibres used for reinforcing structural materials. 650. TAG NEW GRAPHITE INSULATING MATERIALS. Materials in Design Engineering, Oct.1962, 56, No.4. pp.5-7. Two new graphite insulating materials which are claimed to possess unique handling features have been announced. One material, in the form of pure graphite tape, combines the here tofore unavailable property of flexibility with the thermal insulating properties of pyrolytic graphite in the cryogenic to 67CO&F range. The tape has a tensile strength of 18,000 psi in 6-mil thickness. A second material is a graphite insulation in bulk form which reportedly can be cut, pressed or sanded and still maintain its effectiveness to temperatures in excess of 600CF.(Soutce: High Temperature Materials, Inc., 130, Lincoln Street, Brighton, Pdass.). 651. BORON FIBRES FOR STRONGER COMPOSITES. Materials in Design Engineering. Oct.1962, 56, No.4, p.ll. The major significance of the new filaments, lies in their except ionally high modulus (roughly five times that of E glass at room temperature). Coupled with this is their high strength and low density, both comparable with those of E glass, and melting point of 3700F. ASARCO ALV OOO6S68 ASBESTOS BULLETIN. 162 PART 10. MISCELLANEOUS. 652 FRENCH FATENT 1,300,402. TREATMENT OF CRUDE ASBESTOS K.A. Oesterheld. Crude asbestos fibre bundles are dispersed in a liquid and the mixture is passed under controlled pressure between working sur faces where the fibres are subjected to rubbing and bending. The fibres thus prepared are suitable for the production of asbes tos cement, asbestos textiles and cardboards, and also for the preparation of resin-containing mp.sses for the manufacture of, e.g. floor coverings and the like. 653 BELGIAN FATENT 617,157. LIQUID CEMENT COMPOSITION. Dunlop Rubber Co. A liquid cement comprising a latex or dispersion of natural or synthetic rubber and a filler which may consist, wholly or in part, of natural cr synthetic fibres. Suitable latex comprises polychloroprene, or a graft copolymer obtained from natural rub ber latex and trichlcrobrcmomethnne. The fibres may be asbestos fibres of length of no more than 0.25 in.; they may be used in an amount of 10-30$ based cn the dry weight of the composition. The composition may also contain a diluent, an oxide of a group II metal, e.g. ZnO, an antioxidant, a stabliliser and a thickener. 654. FRENCH PATENT 1,303,443- SUPPORT FOR ELECTRICAL RESISTORS. Johns-Manville Corp. Support for electrical resistors consists of a plate made from asbestos fibres (40-60$), diatomaceous earth (35-40$), and an alkali metal silicate (7.5-12.5$) and it is impregnated with an acid solution of aluminium phosphate (so that it retains 15-40$ of the solute), A coating is applied onto the hardened body to prevent the impregnating agent from escaping or diffusing to the surface of the body. 655- BRITISH PATENT 906,867. PROCESS FOR DISPERSING SOLIDS IN POLYMERS. North American Aviation Inc. One of the objects of this invention is to provide a process for the manufacture of rocket propellants. The solid filling substances with which the liquid organic materials are loaded, may be asbestos fibre. ! ; : ! ; ; j T ASARCO ALV 0006869 163 ASBESTOS BULLETIN PAST 11. REVIEW OF JOURNALS. ASBESTOS, October, 1962. 807 Western Saving Fund Bldg., Philadelphia 7, Pa., U.S.A. 656. 1. CHRY30TILE IN SOUTHERN RHODESIA............. Page 2. 2. ASBESTOS TRADE SCHOOL FEATURES A MINING COURSE .......................................... Page 12. 3. ADMINISTRATIVE ANALOGIES .......................... Page 16. A. AUTOMOBILE SALES .............................................. Page 26. 5. BUILDING ............................................................... Page 28. 6. MARKET CONDITIONS .......................................... Page 30. 7. PRODUCTION STATISTICS ................................. Fage 36. 8. IMPORTS & EXPORTS .......................................... Page 38. 9. INDUSTRY NEWS .................................................... Page 48. 10. ASBESTOS STOCK QUOTATIONS ....................... Page 52. 11. CURRENT RANGE CD PRICE .............................. Page 54. ASBESTOS-CEMENT REVIEW. October 1962. Kirc'ngasse 40, Zurich, Switzerland. 657. 1. PICASSO ON ASBESTOS-CEMENT......................... Page 4. 2. HOLIDAY COTTAGES, 'ALZENHAUSE::- SWITZERLAND.................................................... Page 11. 3. A HOUSE BY A LAKE IN SOUTHERNHOLLAND Page 14. . YOUTH CAM? IN BELGIUM................................. Page 16. 5. PREFABRICATED VACATION COTTAGES IN FRANCE............................................................... Page 18. . A FAMILY HOTEL IN THE FRENCHALPS ... Page 20. 7. WEEKEND COTTAGE IN NEW ZEALAND ............ Page 21. 8. HOUSE IN.SYDNEY, AUSTRALIA ..................... Page 22. 9. YOUTH HOSTEL NR.PFORZHEIM, GERMANY... Page 2310. THE PAVILION LANE BOWLING CENTRE:, THE PIER, SOUTHEND-ON-SEA..................... Page 24. 11. HOLIDAY SETTLEMENT IN CORTE LZ CADORE, ITALY............................................... Page 2512. REST HOME IN WEST-BERLIN.......................... Page 30. 13. HOLIDAY VILLAGE IN FRANCE...........................Page 33. 14. STANDARDIZED SWISS VACATION HOUSES .. Page 36. 15. YOUTH CENTRE ON THE ISLAND OF HELIGOLAND...................................................... Page 3916. LAKESIDE BUNGALOW IN AUSTRIA....................Page 42. 17. TALISMAN ISLAND, A VACATION HOUSE COMMUNITY........................................................ Page 44. 18. WORKERS RECREATION HOME BY LAKE SE'TO, JAPAN .......................................................Page 46. 19. ASBEST0S-CE.1ENT AND THE RENOVATION OF EXISTING BUILDINGS ................................... Page 49- ASARCO ALV 0006870