Document 7REBvOG73NzXXV2r76qpRxGpR

l ASBESTOS Vol. 1,No. 4 BULLETIN JULY, AUGUST, I960 Editor: C. Z. Carroll-Porczynski CONTENTS PART 1. MINING . PART 2. ASBEST0S-CEMENT. PART 3. ASBESTOS TEXTILES * part 4. ASBESTOS FRICTION MATERIALS PART 5. REINFORCED PLASTICS. PART S. ASBESTOS JOINTING, C*D A T T7.TH 0^kLA*jr f COMPOSITIONS PART 7. PLASTIC BUILDING MATERIALS . a? PART ASBESTOS PAPER AID INSULATE PART 9. REFACTORY FIBRES BAHT 10 i/ l.n GET. i .A:1: i jQIT^a . PAST 11. REVIEW OF JOURNALS . *-Daq oer'-a/ 79 65 88 es 90 91 91 93 94 96 9V feT) Copyright, Astex Publishing Co.,. 1960 ASARCO ALV 0007025 AS33ST0S BULL3TIM PART 1 79 307. Canadian Mining Journal, 1960, 81, No. 7, p. ISO advocate Mines Ltd. have done a great deal of work in the Baie Verte area. This company holds the concession from the Newfoundlend government. The company President made an agreement in 1958 with Canadian Johns-Manville Co.; Patino of Canada; Amet Ccrpor atior., a Panama company; and Fininciere Beige de 1 'Asbeste-Ciment a Belgian firm. The Canadian Johns-lvianville Cc. will take ctive management of the Advocate Mines holdings. Several undercutting methods, used over a twenty-year period, are ininn Journal 1-7. Plomb described the mine to the I960 Prospectors and Deveio pers Convention. r. O. 5, p. Io0. A final mining aid milling test is being run on 10,000 tons of ore tc determine whether the mine should be put in commercial production. 312. The Mining Journal, 1960, 255, No. 6521, p. 183. Mr. Murray Watts, president of Murray Mining Ccrp. is reported to have stated that the company's drilling programme at TJngava has more than doubled its previously indicated asbestos-bearing tonnage. Over all reserves are now placed at about 7,800,000 tons, grading 020.0 per ton in the "A" zone. The company is also starting a programme in which it is planned to continue drilling until over 9,000,000 tons are indicated before proceeding with actual production plans. ASARCO ALV 0007026 80 313. U S A> R^ck Products, 1960, 63, No. 7, p. 9. ASBESTOS BULLETIN. k. B. Millar, consulting geologist, reports in "Asbestos" magazine that chrysotile asbestos, compacted by great heat and pressure and probably active hot solutions, is present in large tonnages in the Diablo Range of California, notable in deposits owned by Union Car bide Corporation and Basic Resources Inc. The writer sees a market for the closely sized, dust-free, tough asbestos product as filler in plastic and asphalt floor tiles, and says that the oie can be taken out by power shovels in cheap open-pit mining. 314. CLUTE CONCLUDES SURVEY 0? A5EE3TC 1960, 63, No. 7, p. 50. xvOCJO i- rCu.UC uS, It is claimed that Clute Corp. has established the largest reserves of asbestos ore in the U.5.A*. A geological survey disclosed 4 mil lion tons of proved asbestos ore, 7 million tons probable, and 200 million tens possible at its ABC nine near Napa, California. This more than doubles the reserves established cn the property six months before. Construction of a 1,000 tons/day mill is in progress at the mine site, with first major production of asbestos fibre ex pected in August. 31E The Mining Journal, I960, 255, No. 6520, p. 154. --Kr> U.S. office of minerals exploration is reported to be adding to typos of asbestos eligible for Federal exploration assistance. or to only "Strategic" types of asbestos have qualii ICC. Z'OT S-- SiS ar.ee, cut applications will in future be considered a*03? SSOSStCS Cl thor than'Strategic" grade. S'1 5. U* o*R ~'?iANSLATI ON AMPHIBOLS ASBESTOS 0? URAL MOUNTAINS. A. A. Malakhov and Yu. 3. noloviev. izv. vyssh. uchebn. zaved. Corn, zh., 1958, No. 11, pp. 37-47; Ref. Zh. Geolog., I960, No. 4, 7063. In recent years many amphibole asbestos deposits have been discovered in the Ural mountains and neighbouring areas. Fibre length is up to 15-20 cm., block thickness up to 1-1.5 cm. Average asbestos content in the rocks is 1 kg/m^. In Narabalk area crocidolite asbestos has been found. A detailed description of asbestos deposits in various areas is given. 317. . INDIA ECONOMIC ASPECTS 0? ASBESTOS IN BIHAR. 3. N. P. Srivastava. Proc. 46th Indian Soi. Congr. Assoc. (Delhi, 1959), part 3 (Calcutta, 1959), pp. 230-251 , Asbestos deposits in Bihar are estimated to amount to 350,000 tons. They consist of amphiboles and chrysotile embedded in ultrabasic and basic rocks. Fibres have high oxidation and temperature resistance, 8i can be used for asbestos-cement, filters, electric insulation, etc. ^ ASARCO ALV 0007027 asesstos bulletin 81 SIS. ASBESTOS IN INDIA. S. N, P. Srivastava. Indian Minerals, 1959, 12, No. 3, pp. 212-221. Deposits of asbestos (chrysotile, tremclite, anthophyllite, and others) are mined in many parts of India. The most important chry sotile asbestos deposits are situated in Andkhra. However, only a minor part of the demand (7.6% in 1956) can be net by the local production; the rest must be imported. . 319. INDONESIA MINING- LEGISLATION. Mineral Trade Notes, 1960, 51, No. 1, p. 47. The minister of Basic Industry and Mining announced that 1960 asbestos mining mill be started. CYPRUS 320. Mining Norid, I960, 22, No. 8, p. 75. Cyprus Asbestos Mines Ltd. produced 14,412 short tons of fibre ir. 1959, compared with 15,409 short tons the year before, although the amount of ore treated was greater - 1,443,314 tons in 1959 and 1,409,133 in 1958. Experts through the pert of Limassol were mainly to Denmark, Sweden, United Kingdom, Thailand, and Czechoslovakia, The company's leased area is on Troodcs Mountain, with plans and offices at Amiandos in the same area. 521. The Mining Journal, 1960, 255, No. 6518, p. 101. It is reported that Kennecott has ceased asbestos production in the Koz&ni area of Northern Greece. SOUTH AFRICA 322. The Mining Magazine, 1960, 103, Nc. 2, p. 115. South African asbestos output for May, 1960, is reported to be 14,757 tons. SWAZILAND 323, The Mining Magazine, 1960, 103, No. 2, p. 106, The 1959 asbestos output in the Swaziland Protectorate amounted to 24,806,75 short tons valued at 3,085,353, compared v/ith the 1958 figures of 25,260.87 short tons valued at 2,130,952, ASARCO ALV 0007028  <**> 1 . hm, 82 ASBESTOS BULLETIN RHODESIA & NYASALAND 324. Mineral Trade Notes, IS60, 51, No. 2, pp. 9-11, Asbestos Rhodesia and Nyaseland. Federation of.-According to statistics supplied by the Central African Statistical Office, Salisbury, 119^699 short tons of asbestos valued at 7,405,258 was produced in Southern Rhodesia in 1959, compared with 127,115 tons valued at 3,976,538 in the comparative period in 1956. During the first 3 menohs of 1960, a total of 32,854 tons of asbestos valued at 1,769,86? me produced in the Colony. Asbestos producers in Southern Rhodesia in 1959 Name and Address of producer Approximate Grade of Product African Asbestos Mining Co. (Pvt.), Ltd., P.C. Box 1100, Bulawayo. See Rhodesian and General Asfcesocs Core, (pvt.). Ltd. Asbestos Refining Co. (Rhoa.) (Pvt.), Ltd., P.O. Box 891, Bulawayo. Spinning and asbestcs-cenent grades. Fibres specially blended to consu mer s re c ui rement s. Bend Asbestos Ltd., P.C. Box 1426, Bulawayo. Asbestos-cement grades aid shorts. Blue Jay Asbestos Mines, (Pvt.), Ltd., P.O. Ecx 140, Shabani. See Ross McIntyre & partners (Rhod.j (Pvt.), Ltd. Boss Asbestos Mines Ltd., P.O. Box 93, Mashaba. Asbestos-cement grades, shorts and plastic fibres. Dominion Base Metals (Pty.), Ltd. p. Bag 5, Filabusi. Asbestos-cement fibres. D-S.O. Asbestos (Pvt.), Ltd., D.5.0. Mine, Mashaba. See under Ross McIntyre & Partners (PvtLtd* Ethel Asbestos Mines Ltd., P.O. Box 2112, Salisbury. Asbestos-cement fibres. T Kilmarnock Asbestos Mines, Ltd., Asbestos-cement fibres. P.O. Box 18, Mashaba. i v (Continued.) ..... - ' ASARCO ALV 0007029 ASBESTOS BULLETIN Asbestos Producers in Southern Rhodesia (continued) 3 Name and Address of producer Approximate Grade of Product Lanninhurst Asbestos Ltd., p.O. West Nicholson. Special crudes, spinning and * ashestes-cement fibres. M. G. Asbestos (Pvt.), Ltd., P.O. Box 1533, Bulawayo. Asbestos-cement fibres and shorts. Norm Asbestos Alines Ltd., p.C. Box 3, Filabusi. Trial outputs. Asbestos-cement grade* Pangani Asbestos Nines Ltd., P.C. Box 8, Filabusi, Trial outputs. Asbestos-cement grade* F.ex Asbestos Alines Ltd., P.O. Box 16, Alashaba. Asbestos-cement fibres and shorts. R.M.P. Minerals (Pvt.), Ltd., P.O. Box 140, Shabani. - See under Rcss McIntyre Sc partners (r'V'C.), jd Rhodesian Asbestos Ltd., P.O. Box 19, Aiashaba. Asbestos-cement fibres and shorts. Rhodesian and General Asbestos Corn. (Pvt.), Ltd., P.O. Box 1100, Bulawayo. Crudes and Standard C. <5c G. grades for spinning ana asbesocs-cement manufacture. Rhodesian Afonteleo Asbestos, P.O. Box 138, Shabani. Crudes, spinners and asbestos-cement grades. Ross McIntyre & partners (Pvt.), Ltd., P.O.,Box 140, Shabani. Spinning and asbestos-cement 'grades, filter fibres, fibres specially blended to requirements. Rosey Cross Asbestos (Pvt.), Ltd., Crudes, spinners, and asbestos- P.O. Eox 34, Llashaba. cement grades. Vanguard Asbestos Mines (Pvt.), Ltd., P.O. Box 63, Belingwe. Asbestos-cement grades and shorts, specially prepared plastic fibres. 325. ASBESTOS PRODUCTION. Rhodesian Mining Journal, 1960, 52, No. 397, p. 3. Asbestos production for four months of 1960 amounted to 43,324.7 tons valued at 2,354,559.. ASARCO ALV 0007030 84 ASBESTOS BULLETIN 325. '."CRLD PRODUCTION. Mineral Trade Notes, 1960, 51, p. 13. The following table on world production of asbestos is extracted from a table prepared in the Division of Foreign Activities, Bureau of Mines, for publication in Minerals Yearbook, 1959. World Production of Asbestos - 1957-1959 in short tons Country 1957 North America: Canada (sales)........................... 1, 046, 0S6 United States (sold or used by producers) 43,653 South America: Argentina.................................... .. Bolivia (exocrts)..................... Brazil............................ ............... Chile....................... ........................ Venezuela............ ........................... lurcne: Bulsaria............................ .. ........... Finland....................................... .. C-reece..................... Italy................................................ Portugal............................ Scain....................... .................... Yugoslavia................................... A~ia: China............................................... Cyurus............ India.............. ................................. Iran............ ................................. .. Japan................. ............................. Korea, Republic of................... Taiwan Turkey...................................... .. Africa: 319 121 2,654 6,390 - 1,100 10, 031 15,731 57,797 64 500,000 5, 025 33,0C0 15,023 1,910 165x 13,192 96 268 99 Eechuanalana................................ Eritrea.................................. ... Kenya................ ............................. .. Morocco, Southern zone.......... * Estimated"! ' 1,582 55 22 109 132 1958 1959 925,331 1, 050,429 43,979 49,352 285 - 3,616 9,152 - 275X 168 3,300 5, 095 -- 1,100 7,977 20,503 39,627 98 - 550, 000 5,960 1,100X 9.420 25,455 49,594 ICO* - 600,000 4, 748 66,000 16,494 1,19 0 16 5X 11,179 22 47 839 88,000 15,943 1,464 16 5X 13,669 88 150 40x 1,734 1,410 28 30* 485 4002 120 45 -- CcontinuedTT ASARCO ALV 0007031 I ASBESTOS bulletin World Production of Asbestos (continued) 85 Country 1957 Africa (continued): Mozambique..................................... Rhodesia and Nyasaland, Federation of, Southern Rhodesia.... Swaziland....................................... Uganda....r........................ Union of South Africa...... Oceana: Australia.. New Zealand 152 123,124 30,727 157,474 14,670 230 World total (estimate) 2, 070, 000 " Estimated. 1958 1959 284 74 127,115 25,261 5,600 175,644 119,699 24,807 6,418 182,405 15,570 454 , *20 000 45 0X 2,060,000 If 270, 0C0 I 327. TRANSLATION. HIGHLY RESISTANT ASH5ST0S-LIM3-SILICATE MATERIALS FOR RAIL WAY SLEEPERS. I. V. Shpakov. Sb. Leningr. xn-to Inzh. Zh.D. Transp., 1959, No. 157, pp. 42-5c. The binder consists of 35$ lime and 65$ sand. A mixture of equal quantities of sand and asbestos wastes is used as a filler. Optimum ratio binder:filler is 1:1. Materials of this composition have a strength of more than 800 kg/cm2 (standard 500 kg/'cm2), The products can be impregnated with hydrophobic substance such as, e.g., bitumen, thereby its elastic resistivity is increased to the value of electric resistivity of timber (about .2.10 ohm.cm.). The products can be rein forced and then their"strength corresponds to that of reinforced con crete sleepers. 328. TECHNICAL AND ECONOMICAL ASPECTS OF THE DEVELOPMENT OF CEMENT AND ASBESTOS-CEMENT INDUSTRY. V. E. Schneider. Zhur. Vsesogur. Khim. Obshehestve im Mendeleeva's 1960, ,5, No. 2, pp. 221-223. 329. HYDROTHERMAL REACTION IN THE SYSTEM ASBESTOS LIME AND SAND AND THEIR USE ON THE BASIS OF HYDROTHERMAL REACTION IN THE MANU FACTURE OF ASBESTOS-CEMENT SHEETS. Adnam Goksel. (Univ. Istanbul) Rev. Fac. Univ. Istanbul Ser. C.23, 197-200, 1958. dC ASARCO ALV 0007032 86 ASBESTOS BULLETIN 330. TRANSLATION. ASBESTOS-SLAG MATERIALS BASED ON BLAST-FURNACE SLAG. A. Matvienko. Stroitelstro i arkhitektura,1959, No. 4, pp. 20-21; Ref. Zh. Khim., I960, No. 5/ 35723. It has been shown that cement in asbestos-cement materials can be re placed by blast-furnace slag. The strength of pressed and unpressed asbestos-slag plastics comply with the GOST standards, even after only a 4-hr. autoclaving processing. 331. TRANSLATI ON. HYDROPHOBIC CEMENTS. F. K. Schlunz. Silikattechnik, 1959, 10, pp. 556-558. Hydrophobic additives, such as olein, stearine, and others, preserve the activity of binders even on prolonged storage. The binder particles are covered with very thin layers of hydrophobic agents by grinding them together for a sufficiently long period of time. The presence of hydrophobic agents facilitates the grinding. 332. PROCESS FOR RENDERING CH.ENTS HYDROPHOBIC, WHICH INCREASES THEIR STORAGE LIFE. J. Kosina. czechoslov. Patent 87053, 15.9.57 Ref. Zh. Khim., 1960, No. 9, 35729. Cements are rendered hydrophobic by the addition of wastes of the puri fication processes of animal and vegetable fats. A 0.5$ addition of these substances increases the storage life of ceimnt 3-4 times. 333 APPEARANCE OF ASEESTCSrCEMENT.jAN IMPORTANT CONSIDERATION IN DESiGN. Building Materials, 1959, 19, No. 9, pp. 251-282. 334. PIPING. T. W. Edivards. Power, 1960, 104, No. 6, pp. 51-66. Information on piping materials, advantages and limitations of each,, are discussed, including asbestos-cement pipes. 335. B.P. 804,603. BUILDING PANELS. Seco Ltd. The building panel consists of a core of cement-bonded wood-wool and an asbestos-cement facing sheet. 336. B.P. 825,723. MOULDING CORRUGATED PLATES OF ASBESTOS-CEMENT. Comp, de Pont a Mousson. 337. German Patent 1,019,241. COLOURING ASBESTOS-CEMENT SHEETS. Tudor Trust. The sheets are treated with solutions of C^Clg and CaSiFg. 338. German Patent 1,076,011. PRODUCTION OF HOLLOW BODIES FROM CEMENTFIBRES MIXTURES. K. A. Oesterheld. Each layer of the mixture is separately subjected to heat treatment, j. ASARCO ALV 0007033 T ASBESTOS BULLETIN 87 German patent 1,025,319. MOULDED ARTICLES lisenwerke Gelsenkirchen Akt--Ges. goulded parts are made of asbesxos-cement or asbestos-synthetic resin by mixing them under pressure. only 340. German Patent: 1,043,910* MACHINE EOR THE PRODUCTION OF PIPES FROM ASBESTOS-CEMENT OR OTHER FIBRE-BINDER COMPOSITIONS. Torfit-' Werke A.G. Haseke & Co. -.0/-. ve" iclaj g of .9.57 iri- The core on which the pipe is formed is heated to 60-90 deg. C., whereby a thin layer of vapour and air is formed on the surface of the core, which facilitates the separation of the pipe from the core. 341. German Patent 1,075,036. IMPREGNATION OF ASBESTOS-CEMENT PRO DUCTS. V.E.B. Lckomotivbau-Elektrotechnisehe Uerke "Hans Beimler", Hennigsdorf. Shap ed bodies made c-f asbestos-cement are impregnated with solutions of the esters of silica acid. 342. Austr. P. 199,109. SHAPED ARTICIES CONSISTING OF FI RE OzM-iiiT LAYERS AND INTERMEDIATE IMPERMEABLE LAYERS. Eternit Ferke Ludwig Hatschek. Intermediate layers consists of 'waterproofing and binding materials to which asbestos, colour pigments, or other mineral powdered fillers may be added. 343. German Patent 1,081,815. MACHINE FOR THE PRODUCTION OF ASBESTOSCEMENT PIPES. Eternit Societa per Azioni, Genoa. The patent covers a conveyor system of a machine for the production of asbestos-cement Dices. 344. French P. 1,162,583. PROCESS FOR THE PRODUCTION OF ASBESTOSCEMENT ARTICLES. J. P. Bancon. Asbestos-cement articles are formed by filtering asbestos-cement slurry through porous moulds and then compressing the deposit. The moulds can be made from sand, sawdust, etc., bound with, e.g., bitumen. The composition of the slurry in water 300-500 parts, asbestos 15 parts, cement 85 parts. Pressure applied is 2-30 atm. 345. Belg. P. 543,887. WATERPROOFING ASBESTOS-CEMENT. Union Chimique Beige S.A. Asbestos-cement is treated 'with a solution containing silicone (15), toluene (7.5), xylene (7.5), morpholine (1.1), stearic acid (2.5), and H20 (65.5). ASARCO ALV 0007034 fi 8 ASBESTOS BULLETIN PART 3. ASBESTOS TEXTILES 346. ASBESTOS SAFETY CLOTHING. Chemical & Engineering News, I960, 57 (July). Asbestos safety clothing from American Optical, Southbridge, Mass., will shed molten metal at 3,000 deg. F. without deterioration, dis coloration, or loss of resilience. The cloth is specially woven and has 40$-5C$ greater abrasion resistance than ordinary asbestos material. 347. PHENOLIC LAMINATES AS INSUIANT3. V/. 3. Farrall. "lores and plastics, 1560, 21, No. e, p. 235. Use of asbestos fabric is mentioned. 34S. SILICONE DIELECTRIC MATERIALS. K. Do Howlands. Fibres and plastics, I960, 21, Nc. , p. 230. Silicone/resin asbestos insulations. Electrical grades of siliconei impregnate a ascestos woven cxotn find application on sheets, rods, and tubes in electrical equipment especially in dry-type transformers. The use of millboard silicone-impregnated asbestos papers and tapes is also mentioned. A photograph showrs Silastomer insulated asbestos roved gius-s braided overall cable with a silicons varnish finish and also Silastomer insulated asbestos roved and asbestos braided overall struc- 349 3.P. 816,535. SIL0XANE-F0LY33TER RESINS, '.Vestinghouse wloctric xnt. This invention describes a polymerizable silicon-modified polyester resin developed for bonding mica flakes to backing members, e.g. asbestos cloth. PART 4. ASBESTOS FRICTION MATERIALS 550. NEW PLANT. The Mining Magazine, 1960, 105, No. 2, p. 123. Ferodo Ltd. of Chapel-en-le-Frith have announced their intention of building a new factory in Caernarvonshire for the purpose of expanding their production facilities for friction materials generally, 351. BRAKE DESIGN CONSIDERATIONS. R. M. Oddershaw and A. F. Prestidge Automobile Engineer, 1960, 50, No. 4, pp. 157-1590 Formulae are derived for the shoe factor in leading and trailing shoes. For the best wear distribution and maximum performance, the centre of the pressure should lie on the centre line of the lining arc. ASARCO ALV 0007035 ASBESTOS bulletin 89 358. THERMAL ASPECTS OF VEHICLE BRAKING. T. P. Newcomb. Automobile Engineer, I960, pp. 268-295 (July). Discussion of the problem of heat generated during braking. A compari son is made between drum and the brakes am between cast iron drums and bimetallic drums. 1 353. DESIGNING EXTERNAL-SHOE BRAKES. H. A. Borcharat. Mach?ns Design, 1960, 25, No. 6, pp. 163-169. The following factors are limiting the design of shoe brakes: heat dissipation, maximum pressure which the lining can sustain and cir cumferential speed of the drum. Life of the lining is restricted by wear, which is greatest at points of maximum radial pressure, thus the brake should be designed so that radial pressure is as uniform as oossible. .c _e 554. FRICTION MATERIALS. Modern Plastics, 1950, 37, No. 11. Mention is made of asbestos Durez resin composition suitable for the manufacture of a brake lining that shrugs off heat. Resists moisture, oil, and grease, and maintains uniform coefficient of fricuicn -oven in mountain driving. (Durez Plastics Division, Hooker Chemical Corporation, 1207 V/alik Road, North Tcnawandn, N.Y.) 355. UOVEIT -ASBESTOS FRICTION BRAKES. A. S. Ganshin, ?. IT. Eliseev, and A. P. Makarov. U.S.3.R. 125,376 (Jan. 6, I960). 356. B.P. 821,470. POLVTI S. Low. LUGE OEIKYLEME BEARING COMPOSITION. 1 A bearing comprises a metal backing element, a plurality of super posed bended layers of filled polytetrafluoroethylene built on to the- } tacking element and an outer layer of unfilled PTES. I 357. B.P. 824,302. EPOXY RESIN COMPOSITION. British Resin i-roducts I- Ltd. This invention describes epoxy resin composition of low viscosity which when mixed with curing agents and fillers, e.g., asbestos, cure to hard products suitable for use as electric insulation, transformer casings, clutch facings or brake linings. 358. B.P. 627,320. TETPJIFLU0R0ETHYLENE-VINYLIDENE FLUORIDE COPOLY MERS. Minnesota Mining & Manufacturing Co. Asbestos is mentioned as a filler. The product may be extruded into films and fibres for reinforcing ropes,"lines, canvas, conveyor belts, or moulded into gaskets, pump and valve diaphragms and brake linings, or used to insulate electrical wires. ASARCO ALV 0007036  90 ASBESTOS BULLETIN 359. BoP. 840,686. BEARING ELTJT7T3 . C. S. White ' A method of forming a bearing surface between two elements comprises applying a layer of a woven lcr-rnv: ion fluorocarbon material to the surface of one of the elements aai i.-.jection moulding backing material into a space between the other ~e cf the elements." PART 5. REINFORCED PLASTICS 360. . jt v \/x- ASBESTOS PROCESSING (pa: I960), 15, pp. 554, 556 622, 624, 626-628. . Tne -manufacture of asbestos pr general properties of fibrous : plastics; production and props: mats, sheets, and laminates, a bestos1' are tabulated and desc: products are also discussed. 11 and 20) . Gummi ur.d Asbest (July, : 'August, 1960), pp. 616, 618, 620, " is discussed in detail. Important mais used for reinforcement of r of "Durestos" or "Pyrotex" felts, f asbestos papers, such as "Novai in detail. Applications of these 361. B.P. 818,149. GUTTERS; P A tubular column comprises hell material, e.g., asbestos coated deformed upon introduction into profile of a gutter. . S. Elanchi ;1nd R. Laccur. r arranged layers of fibrous synthetic resin. The tube may be tube of one cr more cores to the 362. 3.P. 822,859. SILOKANES , Carbide Corporation. '.CULDING COMPOSITIONS. Union A quick curing moulding compos! or metal fibres, a curing catal; 363. B.P. 823,040. 0RGAN03ILI Silicones Ltd. comprises a filler, e.g. asbestos ind a silcxane. --31 NOUS C0KP0SITIONS. Midland Crganosilicon resinous composition for making structural laminates may contain asbestos as a filler. 364. B.P. 824,048. RESIN COMPOSITIONS. Borden Co. Non-absorbent granules, e.g., asbestos, are coated with a thermosetting resin. The composition is useful for shell and core moulding. 365. U.S.P. 2,924,537. LAMINATED THERMAL INSULATION. Martin Co. A thermal insulation for protecting structural aircraft material from corrosive hot exhaust gases discharged from turbo-jet aircraft engines comprises a base structure of asbestos-reinforced thermo-stable plastic material, e.g., phenol-aldehyde or polysiloxane resin. ^ m ASARCO ALV 0007037 ! ^SESSTOS BULLETIN 91 UeS.P. 2,945,831. DISPERSION OF ORGANIC POLYMERS AND CHRYSO.TILE ASBESTOS AND PROCESS 0? PREPARING FILM THEREFROM. E. I. du Pont de Nemours. !'/liquid coating composition consists of an aqueous slurry containing //5c-o6m0b$ineodf colloidally dispersed polytetrafluorcethylene (based weight of water and the polymer), and from 1-20$' (by on the weight of the polymer) of a colloidally dispersed chrysotile asbestos fibre having an electronegative charge* 367. German Patent 1,025,319. MIXTURE OF FIBRES AND BONDING AGENTS. I Sisenwerke Gelsenkirchen A.G. Shaped articles are made of dense and non-porous fibres, such as asbestos or mineral wool, and of- bonding agents, such as cement cr synthetic resins, by evacuating the components and making them under normal or increased pressure. 1 x .c PART 6. ASBESTOS -JOINTING, SEALING, AND COATING COMPOSITIONS 358. U.S.P. 2,923,539. ASPHALT COMPOSITION. Texaco Inc. An asphalt spraying composition suitable as undercoats for automobiles and insulating coating for metal tanks, pipes, etc., contains from 10$-20$ asbestos fibre. 359. U.S.P. 2,327,035. FIBRATED MASTIC COATING. <7. ?. Schulz. ; An object of this invention is to provide an improved bituminous | roofing material containing fire-resistant fibrated bituminous coating. I Asbestos grades 4K and SS may constitute 68$ of such composition. ; 370. U.S.P. 2,938,937. PLAICE-RESISTANT, HIGH-HEAT INSULATING CQMPOgc5h.- SiTION. Ideal Chemical products Inc. l An insulating composition for spraying metallic parts of rockets and | missiles consists"of a filler (5 parts long chrysotile asbestosrone I part expanded vermiculite) and a fire-resistant vehicle. 371. U.S.P. 2,939,794. COATING COMPOSITIONS. Texaco Inc. | The asphalt coating composition for protection of poles, railway sleepers, etc., contain from 5-15$ of asbestos fibres as a filleru PART 7. PLASTIC BUILDING MATERIALS AND PIPES 372. B.P. 814,611. BUILDING PANELS. Shearwater Ltd. The building panel consists of a paper honeycomb core filled with cement 0r gypsum and outer sheets of asbestos, hardboard or plaster-board. ASARCO ALV 0007038 tfiiWSOTi - f f c N ^ o ASEESTOS BULLETIN 373. P7C PIPE CUTS DIESEL-PLANT MAINTENANCE. T. 17. Edwards. Power. 1S50, 104. No. 8, pp. 218-219. Salt-water coolant and fuel lines at Florida Keys Electric Co-oper ative still look new after 5 hard years. Shifting salty coral made short work of several other piping materials. 374. B.P. 819,112. PVC GUTTERS. J. S. Colvin. A guttering for collecting condensate from windows is made of a flexible channel-section PVC gutter. M 375. B.P. 832,388. RESILIENT SMOOTH-SURFACED ILCOR COVERING MATERIALS. Armstrong Cork Cc# The backing for flooring material may consist of asbestos felt coated with a butadiene styrene copolymer. 376. B.P. 845,348 Jchns-Manvilie Fibre Glass Inc. Forming of fibrous glass casings may be carried out by.wrapping a fibrous mat impregnated with an unactivated binder abour a mandrel, and activating the binder with simultaneous application of pressure to the"Wound mat. U.^>.P. 2,923, 6o8 ASPHALT ADHESIVE COMPOSITIOI Monsanto Chemical CO. An improved petroleum-based asphalt adhesive composition suitable for bonding sheet metal foil to composition roofing contains 20$ of 7M asbestos fibre as a filler. 378. U.S.P. 2,926,150. PLASTIC ASBESTOS TILE. Armstrong Cork Co. Tiles resistant to oils and greases of good strength, flexibility, and dimensional stability, are produced using 70$-80$ filler and 20$-30$ binder. Filler consists of limestone and pigment, 30-60 parts, and asbestos fibre 20-50 parts. Binder may consist of vinyl resin, 2-8 parts, and phenol-formaldehyde resin, 10-18 parts. 379. Austr. P. 197,260. MULTILAYER ARTIFICIAL STONE. K. Heschl. i A fibre-mortar, containing asbestos fibres impregnated with a synthetic or natural rubber, cement, and ?/ater, is used for the production of multi-layer artificial stones. 380. Swiss P. 332,076. STRUCTURAL MATERIALS. Tonwerk Lansen A.G., Lausen beitBasel. Structural elements consist of asbestos, mica, and aluminous cement, .u ASARCO ALV 0007039 AS3SST0S BULLETIN 93 381. Austr. P. 197,736. HIGH-STRENGTH MOSTAR. J. L. Jensen. Mortar of a high binding strength containing chalk, cellulose derivatives, casein, dextrin, powdered asbestos, sawdust, lime, water glass, white cement, calcined soda, water and, if desired, linseed oil. 3 ^ PAP? 8. ASBESTOS PAPER AND INSULATING MATERIALS 362. LEAD-ASBESTOS PADS. Power, 1960, 104, No. S, p. 211. This material finds use in building construction and under heavy mach inery to dampen vibration. The pads usually consist of two 78-in. layers of felted asbestos material separated by a No. 20 gauge steel sheet which provides suoport for handling. Entire mass is then encap sulated in a a/8-in. thick lead shroud. Lead-asbestos pads are_ effective because dissimilar materials in contact tend to resist vibration from nearby railway tracks from travelling back into the structure. 383. MILLBOARD AS INSULATION MATERIAL -insulation Review, 1960, 4, No. 7/8, p. 21. Asbestos millboard is widely used for every kind of thermal insulation. It is' used as a cavity lining in marine works, and on boiler uptakes for thermal insulation purposes, in turbine casings, on the exterior surfaces of ventilation" dueling, ard as an external covering over primary insulation which is then covered in sheet metal. 384. ASBESTOS MILLBOARD. A new leaflet issued by Turner Bros. Asbestos Co. Ltd., lists the following as some of the many applications: catering equipment, iron board rests, hatching incubators, industrial furnaces, glassware manufacturing processes, sheet glass production, motor cars, fire-proof door interpanel linings, steel making and steel founding processes, and interlinings for oven walls. 385. PRESS-ADJUSTMENT. Aircraft Production, 1960, 22, No. 7, p. 255. Use of asbestos felts for insulation and dimensional corrections. One of the recommendations of the National Industrial EueiEfficiency Ser vice is the use of insulation between the platens, and the head and base of presses to reduce steam consumption. A subsidiary and increasing use for Durestos resinated asbestos felt - already well known as a moulding material in the aircraft industry - is the insulation and correction of dimensional faults in hydraulic presses. 386. B.P. 815,102. FACING TILES. Anderson Construction Ltd. The use of asbestos millboard in a scund-absorbent tile is mentioned. ASARCO ALV 0007040 9 4 ASBESTOS BULLETIN 387, NEW INORGANIC ASBESTOS PLATES. Gummi und Asbest, 1960, 13, p. 648. New inorganic asbestos plates "Unarcoboard", manufactured by Union Asbestos and Rubber Co., Chicago, are completely flame-proof and can be machined like wood and polished. 388. B. P. 821,372. COPOLYMER COMPOSITIONS. Armstrong Cork Co. A coating composition for thermal insulation material comprises an aqueous dispersion of a rubbery copolymer or methyl methacrylate and ethyl acrylate as a binder and a major proportion by weight of filler particles, e.g., asbestine. 3S9. U.S.P. 2,921,862. G. Sucetti. The acoustical properties of a plaster consisting of calcined gypsum, bentonite, and an air entraining agent, e.g., vimsol resin, may be improved by the addition of asbestos fibres. 390. U.S.P. 2,922, 207. INGOT MOULD STOOL. G. A. RadU. The use of asbestos.perforated paper for transmission of gases through the_sheet is mentioned. 391. German patent. 1,006,711. ASBESTOS PAPER AID BOARDS. SiemensSchuckertwerke Akt. Ges. The H20 is removed from asbestos by heating to 400-600 deg. The ary product is then exposed to strong acid, washed, pressed and finally processed to form sheets. 392. Spanish Patent 239,242. INSULATING MATERIALS. J. G. Artechi. A highly cohesive insulating material is prepared by using kaolinic fibres as roinforcement in ordinary mortars. PART 9. REFRACTORY FIBRES 393. FIBRE FORMATION OF MOLYBDENUM OXIDE. T. Lewowski and B. Sujak. University of Wroclaw, Poland. Molybdenum wire was oxidized at 500-50 deg. in an electric field of 4,000 V. Fibres are formed of polycryst. Molybdenum oxide. 394. HIGH-TEMPERATURE STATIC 'SEALS FROM METAL FIBRE COMPOSITIONS. .. M. Sabanas. Product Engineering, 1960, pp. 57-61 (May), Impregnating a metal felt with a compatible soft metal results, in an unusual material, which will seal air at 5,000 p.s.i. and 1,000 deg..^ ASARCO ALV 0007041 ASBESTOS BULLETIN 95 395. HEAT-RESISTING HIGH-STRENGTH FIBRES. Chemical Week, I960, p. 78 (June). Heat-resisting high-strength fibres can be made from metallic oxide by "a relatively simple process developed by Horiaons Incorporated (Cleveland). Typical is aluminium oxide (alumina) fibre with tensile strength of 300,000-400,000 lbs/sq.in. at 4,750 deg. F., compared with glass fibre which has a tensile strength of 200,000 lbs/sq.in. [ ^ 396o METALLIC FIBRES. J. F. C. Morden. Metal Industry, I960 pp. 295-499 (June). r '~c Various methods of producing metallic fibres and properties of basic materials are discussed, and their many uses in industry are des cribed . 397. QUARTZ FIBRE-FILLED PHENOLICS. Plastics Industry, 1960, IS, No. 6, p. 24. These are intended primarily for insulation of metal components in missiles. Such moulded parts, providing excellent insulation and erosion resistance, are usable in solid propellant rocket motors, exhaust nozzles and internal missile parts. 2 398. HEAT-RESISTANT LAMINATE Plastics Technology, 1960, 6, No. 6, p. 59. Continental-Diamond Fibre Corn, has developed exceptionally heat res istant laminates designated N-104-84-2. It is made by impregnating graphite fabric with a heat-resistant phenolic resin. 399. U.S.P. 2,937,101. HEAT-RESISTANT COMPOSITION. General Electric Co. A high heat-resistant bonded material consisting of fused magnesium oxide pastilles and phosphoric acid may contain asbestos fibres from 5 to 60 parts by weight of the composition. 400. German Patent 1,016,335. POROUS CARRIER FOR STORAGE BATTERY ELECTRODES. Mareg - Akkumulatoren G.m.b.H. - From 3-10 layers of metallized fibre fleeces carrying the active mass are laid one upon another and sintered together, and further metal lizing is employed b^ e.g., dipping or spraying. - ASARCO ALV 0007042 ASBESTOS BULLETIN PART 10. MISCELLANEOUS 401. B.P. 826,738. SILCXANE COMPOSITIONS FOP. MAKING DENTAL IMPRES SIONS. Wacker-Chemie G.m.b.H. Asbestos flour is mentioned as a filler. 402. German Patent 973,246. IMPREGNATION CF FABRICS, PAPER, WOOD, ASBESTOS, OR POROUS CERAMICS. Bohme Fettchemie G.m.b.H* Aqueous solutions used contain carbamides or aniroazines with at least 2 amino groups having reactive H atom, an alde hyde and a water soluble metal sulphite. Metal ions, such as Cu, Hg, Su, or ?b, which have a bactericidal or flame-retarding effect, may also be introduced. Thermal cr chemical curing may be used. 403 German Patent 1,022,314. CONTINUOUS INORGANIC FIBRES. '.7. Siebenborn. CF ARTICLES FROM Inorganic fibres, such as glass-, slag-, basalt-, cr asbesros fibres, are mimed with a powdered binder in a rotary mixer, whereby long-fibre material is separated from the ^port-fibre material* 404. ASEZSTOSIS AID CARCINOMA OF THE LUNG. Anderson, John Sc Campagna, rancis, A. Arch. Environmental Health, I960, 1, No. 1, pp. 27-32. A case of asbestosis associated with lung cancer is reported with., autopsy results. 405. REVIEW OF DUST ASSESSMENT TECHNIQUES. C. R. Ross, Canadian Mining & Metallurgical Bulletin, 1930, 53, No. 578, pp. 419-423. The assessment of pneumoconiosis-producing dust by means of konimeter, the inpinger, thermal precipitator and tyndallcaeter is reviewed. Sixteen references* 406. German Patent 1,085,547. HORTICULTURAL SOIL. H. Fruhstorfer. In a horticultural soil composition consisting of clay, peat, and plant nutrients, the pent can bo replaced, Tdiolly or partly, by mineral wool, slag wool, asbestos fibres, glass wool, etc. The action of the mineral wool is physical and chemical; it loosens the soil, regulates the pH, and may also contribute trace elements* 407. Belg. P. 588,609. FILLING MASS FOR ACETYLENE CYLINDERS. Chemotron Corp. High permeability filling mass for acetylene containers is produced froff slurries of asbestos fibres, chalk, and water-saturated charcoal which are mixed togethor with finely divided silica to give a homogeneous sus pension. Asbestos content is 20-30$. The mass is then compacted and , dried using ..vibrations-to ensure high density. ~ ...;lJ ASARCO ALV 0007043 PART II. RSVISVI 0? JOURNALS ASBESTOS-CEMENT QUARTERLY, (Spring, I960) 3 Asbestos-Cement Products Association, 509 Madison Avenue, New York 22, New York, U.S.A. Contents 408. 409. 410. 411. 412. 413. 414. An All-Asbestos-Cement House. New Variations in the Use of Asbestos-Cement. An Important Development in penalized Construction. New Crinkles in the Use of Corrugated Asbestos-Cement. Unusual Roof Posed Unusual Problems. Opportunities for Exploring Banalized Construction. The Architect of the Asbestos-Cement Research Heme. 5-19 INTERN .1TI0NAL ASBESTOS-CEMENT REVIET Editions Girsberger, Zurich, Switzerland. Contents 415. 416. 417. 418. 419. 420. 421. 422. 423. Buildings for the Olympic Games in Rome. (Numerous asbestos-cement installations are described.) Memorial Hall, Peterborough, Ontario, Canada. Hall for Indoor Games. Changing Rooms of a Sports Ground in Geneva. Gymnasium of Litchfield High School, Connecticut. Skilodge in the Kosciuska National Park, I7.S.V7. A Prefabricated French Gymnasium. Municipal Swimming Pool in Tokyo. Roofed Grandstands. ASBESTOS (July, 1960) 807 7/estern Saving Fund Bldg., Philadelphia 7, Pa., U.S.A. Contents 424. 425. 426. 427. 423. 429. 430. 431. The Outlook for Crocidolite Asbestos. Air Separators Assure Varied Grades of Asbestos. A.S.T.M. - Annual Meeting. Production Statistics* Imports and Exports. Current Range of Price Asbestos Stock-Quotations. Patents. ASARCO ALV 0007044