Document EVkvOk42KnRL01addzLBD7JL

PLAINTIFF'S EXHIBIT ASBESTOS BULLETIN Vol.7 No.4 Part 1. Part 2. Part 3Part 4. Part 5Part 6. Part 7. Part 8. Part 9. Part 10. Part 11. July - August, 1966. Editor: C. Z. Carroll-Porczynski CONTENTS ASBESTOS MINING................................................................... ASBESTOS CEMENT................................................................... ASBESTOS TEXTILES............................... .............................. ASBESTOS FBICTION MATERIALS........................................ ASBESTOS REINFORCED PLASTICS .................................... BUILDING MATERIALS AND PLASTIC PIPES .................. ASBESTOS PACKING,COATING & SEALING COMPOSITIONS ASBESTOS PAPER AND INSULATING MATERIALS. . . . REFRACTORY FIBRES.............................................................. MISCELLANEOUS................................................................................ REVIEW OF JOURNALS .......................................................... Page SI 94 103 104 105 108 109 111 113 114 115 I iffljpli- >. I'>H m inii.mwM num i. ASARCO ALV 0005786 asbestos bulletin 91 PART I. ASBESTOS MINING. CANADA. 343 GENERAL GEOLOGY AND ASBESTOS MINERALISATION IN THE CHIBOUGAMAU DISTRICT. Gilles Duquette(Geologist, Dept, of Natural Resources, P.Q., Paper presented at the 34th Annual Convention of the Prospectors and Developers Association held in Toronto, Ont., Mar.6-9*1966) Canadian Mining Journal, April 1966, p.70 and. p.76. The Chibaugmau Region which represents one of the largest copper producing camps in Canada, is currently undergoing a period of rather extensive exploration for chrysotile asbestos. Large asbestos deposits have already been outlined and it is expected that some of them will be put into production in the next few years. The purpose of this paper was two-fold: first to outline briefly the geology of the district with special reference to the rocks in which asbestos occurs, and second to give a short description of the main asbestos deposits. Location and access: The Chibaugmau district is located seme 300 miles north of Montreal. All-weather roads and railway lines link the area with the lake St-John district 130 miles to the southeast and with the Senneterre region, approximately 200 miles to the south west. Summary and conclusions: Even though chrysotile asbestos was found in the region as early as 1904, it is only during the last decade that the Chibougamau area has witnessed serious exploration efforts for that mineral. Yet some of the results obtained during that period can be rated as quite encouraging. Best example of this, of course, is given by the McAdam Mining group who claim to have outlined by drilling in the Roberge Lake area a total of 165 million tons of a mineral which could be mined by open pit methods, and could after beneficiation by screening out one third as a low grade over size, yield 110 million tens, having an average asbestos content of 5.30 per cent valued (as of July 1965) at >6.95 per ton. Should the present programme which calls for the bulk sampling of some of the larger zones prove to be successful, it is expected that pro duction plans will be announced shortly after. 344 CASSIAR ANNUAL REPORT 1965. According to the 14th Annual Report of Cassiar Asbestos Corp.Ltd. sales of asbestos fibre for 1965 amounted to (17,526,197 compared with 14,466,691 in 1964. ASARCO ALV OOOS7S7 I 92 ASBESTOS BULLETIN & %. s 345 ASBESTOS IN EASTERN CANADA. P. H. Riordon. Geol.Soc.America Spec. Paper, 1965, No.82, p.375. if In eastern Canada, 20 large chrysotile asbestos deposits have been# I discovered daring the last 15 years. Eight of these deposits are >? ] exploited on a large scale. Crocidolite asbestos deposits have also: been found. Genesis of these deposits is discussed. 's? 346 CANADIAN PATENT 644,150. GYRATORY SCREEN FOR MILLING t : ASBESTOS. Denovan Ltd. A screening machine for use in the milling of asbestos comprises a * screen body and means for imparting gyratory movements to the screen, : a drive bearing constituting support for the head end of the screen' body, and resiliently cushioned stabilising and supporting struts. ... This mechanism has no horizontal shafts from which*grease seals might leak and spoil the fibres. 1 347 GEOLOGY OF RICKARD, KNOX AND KERRS TOWNSHIPS, DISTRICT ,.j OF COCHRANE. P. S. Simony, Geol. Rep. Ont. Dep.Mines, "< No.37, Toronto, 1965. ; General, structural and economic geology of this area in the "clay ~ belt" in North Ontario along the Abitibi River is described. Asbestos occurs in serpentinite near Lake Abitibi. 348 ASBESTOS CORPORATION LIMITED. 1965 Annual Report, Outside exploration was undertaken in Ontario, British Columbia, California, Oregon, and Alaska,in the course of which 34 asbestos and 17 base metal prospects were examined. Other exploration vent ures on a joint basis with partners involved work in the Northwest Territories, the Yukon Territory and Manitoba. !! U.S.A. 349 CALIFORNIA - ASBESTOS PRODUCTION. Mineral Information 4- Service, California Division of Mines and Geology. 5* Production of asbestos for the year 1965 has been estimated at 70,000 short tons, valued at $b,009,000. RUSSIA. -,v 350 BRITTLE CHRYSOTILE-ASBESTOS. M. V. Soboleva and N. D. M. Sobolev. Nedra, 1965, 68 pp. Ref. Zhur.Geol.,1966, 3166 (A book.) ____ I ASARCO ALV 0005788 1 asbestos BULLETIN 93 351 THE MOLODECHNOE CHRYSOTILE ASBESTOS DEPOSIT. N. D. Sobolev Sov. Geologiya, 1965, No.11, 71-77; Ref.Zhur.Geol.,1966,5168. The Molodechnoe chrysotile asbestos deposit(3elarus S.S.R.) is associ ated with a serpentine massif having a peridotite core. Chrysotile asbestos veins are of three generations. The chemical compositions of these varieties are given. The first generation is rich in alk alis, but has a low magnesium oxide content; the second is also rich in alkalis; the second and third generations do not contain calcium oxide and titanium oxide. Characteristics of asbestos fibres are given. 352 CHEMICALLY RESISTANT ASBESTOS OF KAZAKHSTAN. M. M. Budai, G. I. Burd and N. N. Vedernikov. Sbernik "Geol. i. resurcy agrckhim. syrya Kazakhstana" alma-Ata, "Nanka",1965,192-199? Ref.Zhur.Geol., 1966, 4174. A number of asbestos deposits in Kazakhstan(U.S.S.R.) are described. Bugetysai deposits comprise anthophyHite-talc lenses. In the Kitarsai-II deposits there occur actinolite inserts in association with anthophyllite -talc-carbonate deposits; the fibres -of these deposits are highly acid-resistant. In the Karasai region, there is a deposit of a carbonate-anthophyllite type, comprising 1.5-3 cm.thick veins of brittle asbestos; the fibre content of the deposit is from 0.5 to 6 - 7#. In sedimentary deposits associated with the Kummulin syncline, there are rhodusite-asbestos deposits of industrial value. In some effusive deposits, there are inclusions of amphibole-asbestos of the actinolite-tremolite series, resulting from regional metamorphism (Yaltin region) or contact metamorphism (Karabaitam region);they require a more detailed investigation. | 353 METHODS FOR PRODUCING SYNTHETIC ASBESTOS. A. D. Fedoseev. ! Vestnik. Akad. Nank. SSSR, 1965, No.10, 46-48. Ref.Zhur.Khim. 1966, 6M291. A procedure was developed for producing asbestos by synthesis in melts and under hydrothermal conditions. Fibrous silicate of the amphibole and serpentine type asbestos have been synthesized and their properties were investigated. Synthetic fibrous fluoroamphiboles have a constant chemical composition, heat resistance higher than that of natural asbestos, good resistance to attack by alkalis and acids, and high mechanical strength. 354 THE MINERALOGY AND GENESIS OF RHODUSITE FROM THE DZHEZKAZGAN AND SOUTH-MINUSINSK BASINS. 0. B. Beiseev.Doklady Akad. I6.uk SSSR, 1966, 167, No.2, 414-419. :j' '] j. |: .i; if } .1 U ASARCO ALV 0005789 94 ASBESTOS BULLETIN EUROPE. HM vf*/' 355 MINERALISATION OE THE GREEK SERPENTINES. K. Zachos.Method.es prospect, chromite, Paris, 1964, 49-54. 15 c-l Genesis of serpentine deposits in Greece is discussed. One of these * deposits in the southern part of the Vurinos mountain, is rich in asbestos. The asbestos content of the deposit is 3*5 - 4#} its '* thickness is about 80 m., and the evaluated mass is about 100 mill.ton. 356 POUR NEW FINDINGS OP ANTKOFHYLLITE IN THE REGION OP THE CZECH MASSIP. K. Tucek.C-asep.Naredn.Muzea Odd.Prirodovod. 1965, 134, No.1, 44-47: Ref.Zhur.Geol.,1966, 2V243. In the Czech crystalline massif near Prague, new deposits of antho- phyllite were found in association with phyilite, coraicrite or andaluzite shists, amphibolites, spilites, diabases, serpentinites " and biotites. Anthophillite occurs in veins of a thickness of ' 2 to 5 cm. It forms fine silky fibres which are colourless in trans-, mitted light. 'j 4 A i 4 T '/ i 357 TREMOLITE FROM JORDANOW NEAR SOBOTKA (LOWER SILESIA). *H W. Heflik. Bull. Acad. Pol.Sci., Ser.sci. geol. et georg.1964, ' 12, No.4 , 22 7-237. :: Tremolite from Jordanow forms 0-5 - 10 cm. thick veins in nephrite > deposits. It occurs in the form of white or pale greenish acicular t crystals or fibres oriented para lie ly. It contains inclusions of isomorphic ferretremolite. Data are given of chemical composition, 1 icrystalline structure, optical properties, x-ray and spectrophoto- f metric analyses, and differential thermal analysis. The formation O- 3 of tremolite is explained by the hydrothermal netanorphism of basic gabbro mass. Wj PART 2. ASBESTOS CEMENT. *4 358 ANALYSIS OP ASBESTOS-CEMENT BINDERS. G. L. Kalousek, P. V. Camarda, J. E. Kopanda and Z. T. Jugovic. Materials Research & Standards,ASTM, April 1966. Differential thermal analysis, X-ray diffraction and uncombined Ca(0H)2 analyses were used in studying the binders of ten auto claved and nine normal-cured commercial asbestos cement products, and five series of laboratory-prepared specimens. 359 ASBESTOS CEMENT PIPES WORKING UNDER PRESSURE(DAS ASBESTREMENTDRUCKROHR). K.Huneberg,Springer Verlag,1963,550 pages. JCK 'ii * 4a ;.\s&t, :,V'$ a 1 I 3 ASARCO ALV 0005790 AS3SST0S BULLETIN 95 36O MODERNISATION OF THE ASBESTOS-CEMENT MANUFACTURING EQUIPMENT. S. B. Khmirov Translation from Russian This report covers the work carried out to modernise the asbestos-cement manufacturing equipment at the Kapsk asbestos-cement factory. In the course of modernisation of the sheet forming machine CM-343 two supplementary compressing rollers were installed, result ing in increased gradual pressure on the main compressing roller. The spring loaded compression mechanism was replaced by an hydraulic one, permitting more accurate control of the pressure applied. In order to avoid a second moistening of the films water repell ing pipes were introduced (Fig.l). They work on the principle of compressed air jets being directed tangentially to the formation roller and under an angle to its axle. The air jets cut off the water wedge from the felt's surface and drives the water away in tensively, thus preventing the films from a second moistening. In order to improve the primary dewatering of the film and to help with its transfer from the mesh cylinder onto the felt, rubber covered c^uch rolls of 450 mm diameter were installed. At the asbestos-cement factory in Brotseni where the two supplementary compressive rollers and large diameter rubber covered couch rolls were previously installed, output of the machines increased to 40 - 50 thousand standard slates per shift (at felt speeds up to 50 m/min). The sheet forming machine is equipped with two consecutive vacuum boxes with gradual vacuums. In the first box (as the felt moves) the vacuum is kept at 100 - 150 mm. mercury, in the second 200 - 250 mm. The exhaust is positioned centrally and the rollers are mounted on self-aligning bearings. This improvement prolongs the useful life of the felt by 10 - 15$. In order to minimise the damage of the felt's edges, the ends of the vacuum boxes are equipped with endless belts moved by the felt. Installation of two vacuum boxes with comparatively low vacuum secures effective dewatering of the film and helps to retain its ASARCO ALV 0005791 r 96 ASBESTOS BULLETIN more uniform structure (during the first and the second dewatering, the loose cement particles are absorbed on the asbestos fibres). The drive of the sheet making machine has been also improved. Hinged coupling was introduced (Hooke's coupling), for connection of the supporting roller with the driving gear (motor, reduction gear, toothed gearing) and transfer of the felt beater's driving sprocket onto an intermediate shaft of the reduction gear. ill XiTtf**. Transferring of the leading sprocket improves the felt cleaning*' since the felt beater rotates in opposite direction to felt move- .q ment (Pig.2). ? Efficient mesh cylinder washing is secured by reciprocating if- movement of the spray pipes. On the shaft of the vat stirrers (Hogs ).V is fixed a sloping disk (Pig. 3) which when rotating conveys recipro-^. eating movement to one end of a link, the other end of which is -~ hinged to the spray pipe and imparts the same movement to the latter.4 The majority of the factories are working with different slurry*? concentrations in the vats, by this creating difficulties and im- *. pairing the manufacturing process (uneven thickness of the sheet m* and irregular working). To create an equal concentration a stirrer? is installed, which makes easier the observation of the manufacturing i B4 process and manning of the machine. Installation of the stirrers ^ for an equal concentration of the slurry in the vats at the factory -t "Krasnii Stroitel" has already justified itself. In order to do * away with man-power for carrying and weighing of asbestos, a semi- ~ automatic process was designed. * By means of a conveyor belt the material is conveyed into a battery of hoppers, each of which serves for a certain grade of asbestos. %i {a % The capacity of the battery is calculated for a day's consumpt-J ion of three process lines. Asbestos is transferred from the hopper by means of a worm feeder and goes to the weighing apparatus ** and from there onto interflow band conveyor. Further the material W goes on a distributing conveyor, and from there by automatic remover';?-; into kollergang. According to the existing scheme the milled asbestos by means of an elevator is transferred into a special small tank, to which . rr simultaneously is supplied clarified water from recuperators. Pump 4HF-4 delivers the formed asbestos suspension to. the hcllander.rf This scheme for feeding asbestos from kollergang to the hollander eliminates danger of breakdowns. From the kollergang asbestos is :jfi ASARCO ALV 0005792 ASARCO ALV 0005793 r Edicts of r-eb^stco fQodir* from s.oilc',,g>rz j to hollondor 1 - ebnta; 2 - small a^ta'cci*; 3 - P3?i ; - four *G7 valve; 5 - fcollando:?; 6 - pipo. . 4-j extssAJttsirvr Pig,5. Mechanical eotrn rsnc.^or 1 - vertical shaft; 2 - a cun recover; 3 - chains; 4 - chute. ASARCO ALV 0005794 asbestos bulletin 101 transferred to a snail agitator, to which also clarified water fron the recuperators is supplied (Fig,4). Pump 4HF-3, which is working on a closed cycle, secures hydropulping of asbestos and also pumps the asbestos suspension into the hollander, where the final pulping and also formation of asbestos-cement suspension takes place. The working cycle of the hollander is shortened by 2 - 3 min. When cement is delivered by hand from the weighing apparatus to the hollander, it is difficult to obtain an homogeneous suspen sion. Installation of a cellular feeder on the weighing apparatus secures an even feed of cement into the hollander and consequently efficient mixing with the asbestos suspension is achieved. In order to shorten the cycle of the kollergang treatment, the number cf revolutions of the runners was increased from 12 to 16, and, as a result, the cycle could be shortened by 4 minutes. The efficiency of the kollergang treatment is considerably improved by even distribution of the water throughout the asbestos charge. For this purpose measuring tanks were installed from which clarified water through sectional spray pipes is supplied to the kollergang. The final fluffing of the asbestos and its mixing with cement takes place in the hollander. By altering the profile of its trough according to the type used ax Brotseni and Belgorod factories, the efficiency of the hollanders increased due to uniform movement of the slurry throughout its section. The degree of fluffing was further increased by installation of a 1200 mm diameter blade roller of welded construction. At the Kapsk factory efficiency of the recuperation system was improved and the time required for cleaning of the recuperators reduced by installation of a constantly functioning mechanical scum remover(Fig.5) As the shaft rotates the chains prevent the asbestoscement particles from settling in the conical part and because of their slow motion they do not interfere with the clarification pro cess. The scum remover, while rotating together with the shaft,with its lower part (disused felt) slides over the water level, collects the scum and discharges it into a chute. This new scum remover secures reliable working of the recuper ators, economises consumption of the raw materials, cuts stoppages of sheet forming machine(there is no need to stop the process line for maintenance more often than once a month). .1 ASARCO ALV OOOS795 102 ASBESTOS BULLETIN 361 STRENGTH OP GLUE JOINTS OP ASBESTOS CELIENT PIPES. P.Seeps and A. Szittner. Az Epitcipari es Ivozlekedesi Muszaki Sgvetem Tudomanyos Kozlemenyei (Budapest), 1964, 10, No. 2, 101-102. Asbestos cement pipe joints of various types were glued with "Araldit 123 B" and "Epamin II". Various tests for bending strength were carried out. Plange joints proved to be as strong as the asbestos cement itself. They are also easy to execute. Simple end joints and joints with reinforced rubber inserts proved to be less satis factory. 362 THE GEOMETRY OP CUTTERS POR THE MACHINING CP AS3EST0S CEMENT PIPES. I. P. Zakharenko, E. I. Vai and i. Ya. Brezhinskii. Stroit. Mat., 1966, 12., Nc.l, 6. Optimum form and dimensions of cutters for machining asbestos cement pipes are given. The cutters are clad with hard tungsten-base alloys. The performance of the cutters depends greatly on the type of alley used. The best results have been obtained with the hard tungstenbase alloy, lletalloceramic claddings proved to be useless because cf chipping. 363 STANDARDISED DIMENSIONS C? PI 3RE-CONTAININC- STRUCTTEA SLSMrliTS. G. Kcssatz and H . ?. Mosch. BaustoffIndus v--~--- j 1965, 8, No.6, 185-187. 1 o vwau a. > dimensions (German) are tabulated for various fibrc-coutainirg structural elements, including asbesxos cement pluses, corrugated asbestos cement tiles, asbestos fibre plates (Neotunite) etc. The necessity of standardising the dimensions cf some new structural elements is discussed. 364 JAPANESE PATENT 22862/65- APPAE TUS POR 0OREUGATING FIBRE CEMENT PLATES. K. A. Oeste-rheid An apparatus for corrugating fibre cement plates consisting of a number of sections is described. It comprises suction boxes and an elastic sheet extended by small stretching forces. The margin portions of the elastic sheet are impermeable. 365 FRENCH PATENT 1,425,393. LAMINATED MATERIALS. C.S.E. Duclay. Structural materials are prepared by coating plates of asbestos cement, concrete etc., with an adhering layer of plaster reinforced with fibres glued with an impermeable polymerisable material and, on the side, with a layer of a cement mortar. ! t ASARCO ALV 0005796 . m i , * + i*ht * I ll.......... ULEETIN 103 366 FURTHER DEVELOPMENTS OF THE ASBESTOS CEMENT INDUSTRY. T. Gero. Staviro, 1965, 43, No.11, 414-416. The present state of the asbestos cement Industry in Czechoslovakia and the types of asbestos cement articles marketed and their appli cations are described. Aspects of further development of the asb estos cement industry in Czechoslovakia and elsewhere are discussed. 367 3E1GIAN PATENT 669,876. IMPROVING ADHESION OF RESIN COATINGS TO BUILDING MATERIALS. I. Tziboulsky. The adhesion of resins to building materials, e.g. fibre-cement sheets, is improved by treating the latter with an aqueous solution of an acid, e.g. 5fo hydrochloric acid, to neutralise free CaO or other basic compounds in the cement. Then a coating of e.g.diluted polyester resin is applied onto The sheets, followed by a second coating of undiluted polyester, which may contain fillers. The process is also applicable to coatings of other resins, such as polyepoxies etc. 368 PROCESSES FOR THE PRODUCTION OF ASBESTOS CEMENT. L-. Frikell Zenent-Kalk-Gips, 1965, Nc.6, 299-304. Methods cf manufacturing asbestos cement products, as described in the patent literature, are described. The survey includes the dis cussion of general problems of the manufacture application cf asbestos cement products. and sections decline with the fiberisaticn of .asbestos minerals, surface treatment of asbestos fibres, regener ation of asbestos cement masses, substitute fibres, binders, special asbestos cement crcducts and colourants for asbestos cement. 369 REINFORCING PORTLAND CEMENT WITH FIBRES. S. Coldfein, Revista de plasticos, 1965, 16, No.110, 590-594 (in Spanish). A high grade portland cement and its mixtures with sand were rein forced with various fibres, including nylon, polypropylene, poly ethylene, sarar., orlcn, algodon, dacron, glass fibres, steel wire and shawings. PART 3. ASBESTOS TEXTILES. 370 TECHNOLOGICAL COMPARISON OF MACHINES USED FOR SPINNING ASBnSTOS. K.Spate,Gummi-Asbest-Kunststoffe,1966,19, No. 5, 573-580. Technological characteristics are given of the production of asbestos yarns in the wing-,ring-and centrifuge-type spinning machines.Physical properties of asbestos nixed yarn produced in all the three machine types are described and evaluated from the standpoint of tecnnclogy. ....................... < lM)......... . ..................... .................. .. I ......................................... ASARCO ALV 0005797 1C4 ^SBESTCS BULLETIN 371 CANADIAN PATENT 705,858. COATED ASBESTOS DIAPHRAGMS FOE ELECTROLYTIC CAUSTIC CELLS. Pittsburgh Plate Glass Cc. An asbestos fibre diaphragm for a cell for electrolysing alkali metal chloride solutions is coated by contacting it with a solution containing a mixture of divinylbenzene, ethlvinylbenzene and styrene. After the impregnation, the solvent is evaporated from the diapnragm ana the impregnants are copolymerised. The resulting diaphragm contains a high polymer loading and is resistant to attack by alkalis. 372 CZECH PATENT 114,352. ELECTROLYTIC C LL FOR THE SIMULTANEOUS PRODUCTION OF CHLORINE AND Al'CALI 32. 1 CARBONATES. J. 3ale;j et al. An electrolytic cell for ohe production of chlorine and alkali metal carbonates is provided by a suspended filtering diaphragm made of plastics or asbestos. Carbon dioxide is introduced into the cathode compartment. 373 BRITISH X .1 *rXrrX?JA!7Jo. *->J-r..-*.,c.*- ^ J*? <o PROCESS PC; : HEATING FIBRCUS MATERIALS iionsanto Chemicals Ltd. The process of the invention is one for improyi.ng the properties of a fibrous material, in which it is treated with a composition contnining a protective colloid and a latex of a c opolymer cf 20 to 70 parts by weight of ethylene and correspondingly from 80 -cc 30 parts by weight of vinyl acetate pc-r ICC parts of cop olymor. Fibrous materials which can be treated :include for exam ole those based on mineral fibres such as asbestos PRT 4. ASBESTOS FRICTION MATERIALS. 374 RUSSIAN PATENT 179,932. METALLO-CERAMIC FRICTION MATERIAL, Inst.Metallokeran. i Spetssplavov, AN USSR. Attrition resistant metalioceramic friction material, based on iron with silica and asbestos, comprises(in %): aluminium 7-9? silica 1-3; asbestos 1-3? phosphorus 0.7 - 1; manganese, silicon, nickel, chromium, sulphur etc., up to 2; the remainder being iron. 375 ADHESIVE STRENGTHENS BRAKE LINING BOND. B.T.R. Industries.Ltd Metalworking Prod. 109, No.43, 27th Oct., p.7. Plastilock, a nitrile-phenolic based solvent adhesive is said to secure linings to brake shoes with a bond five times stronger than rivets. The resultant bond is serviceable in temperatures from -40 to +600 F. and is said to have excellent resistance to water,chemi cals and sudden thermal shock. .! ASARCO ALV 0005798 ASBESTOS BULLETIN 105 376 METAL-FXLLEL TEFLON FOR CLUTCH FACINGS. D. Aurieres. J. Teflon, 6, No.4, July-Sept. 1965, p. 1, 6-8. An account is given of the use of metal-filled PTFE for clutches such that a good coefficient of heat sharing was obtained together with the necessary properties for clutch facings. 377 METALLCCERAMIC FRICTION ALLOYS FOR SHOCK ABSORBERS. B. G. Keglin et al. Porcshkovajra Metailurgiya, 1966, 6, No.4, 30-33. Conventional shock absorbers comprising frictional steel-steel pairs are not very stable in action and have a number of other drawbacks. Better results can be obtained by using a metalloceramic-steel eombin ation. The compositions investigated comprised asbestos and silica, as frictional materials, barite and graphite as surface-film formers, and copper as an agent promoting the formation of an intermediate lay er resistant to repeated deformation. Impregnation with tin or lead are also applied. Details of the production and performance of these materials are given. 378 BRITISH PATENT 1,003,246 FRICTION PLATES WITH PTFE FACINGS. General Motors Corp. A friction plate includes a metal backing member having a facing secured to it by a resin adhesive, the facing comprising a felted, r-inhered non-metallic sheet consts ting of at least 50fa by weight of PTFE, which is intimately mixed wi th ceramic fibres. Preferably,the fibres are aluminium silicate fibr es, or glass fibres. The adhesive may be an epoxy resin cement. 3T. BRITISH PATENT 1,003,93-0. MAGNETIC FRICTION MATERIALS AND PACKINGS AND BEARINGS. Compagnie aes Machines Bull. A -material having high magnetic permeability and having resistance to friction, adapted tc form a magnetic friction packing between metal surfaces on frictional engagement and adapted to be traversed at least partially by an intense magnetic field, is formed by sinter ing a mixture of PTFE and iron powders. PART 5. ASBESTOS REINFORCED PLASTICS. 380 BELGIAN PATENT 667,358. HEAT - AND LIGHT - STABLE RESIN COMPOSITIONS. Tenneco Chem. Inc. Compositions stable to heat and light comprise a vinyl halide resin, an^i^organic filler, preferably asbestos, and a heat - stabilising I ASARCO ALV 0005799 106 ASBESTOS BULLETIN 381 BELGIAN PATENT 661,119. HEAT-STABLE THERMOPLASTIC ORGANOSjlLOXANE ELASTOMERS. Bow Corning Corp. The above materials are manufactured by mining together 100 parts of a substituted organcsiloxane polymer(containing methyl, phenyl, trifluoropropyl, hydroxyl or vinyl groups as substituents),2-35 parts of asbestos fibres, 5-7.5 parts of a stabiliser and a polymerisation catalyst, such as an organic peroxide. In an example, 100 parts of dimethylsiloxane po^uaer (containing about 5,0C0 siloxane units and a proportion (7.5 mol.fr) of methylvinylsiloxane) were mixed with 15 parts of asbestos fibres (of an average length of 7.2 mm.) and tert. butyl perbenzoate as a catalyst. To some samples, 5 parts of poly ethyl silicate were added as a stabiliser. The mixture was milled for 10 mins, at 150C. Samples were subjected to various heat treat ments and the properties of the products were investigated. 382 GERMAN PATENT 1,106,868. PROCESS FOR HAPPENING POLYP SIPES PREPARATIONS COMPRISING UNSATUBATPB NITROGEN-CONTAINING POLYESTERS. Chemische vVerke Witten. A process is described for hardening at r^cm temperature preparations containing unsaturated polyester comprising incorporated therein specified tertiary amines, with addition of copolymerisable vinyl or ailyl monomeric compounds, organic diacyl peroxides and, optionally, fillers and dyes. Suitable fillers include, inter alia, asbestine. 383 GERMAN PATENT 1,196,863- INJZCTICN-MOULBING PREPARATIONS, COMPRISING rOLYAMiBES AMB PiBRCUS rj-ln^ES. Bu Pont; de Nemours. An injection-moulding preparation is made of 20-8C wt.fr polyamide and 8C-20fr asbestos fibres of a length of 1 to 100 microns and a lengthdiameter ration of 50;1 to 100:1. In addition, 1-2 wt.fr of a silane can be incorporated. The preferred polyamides are polyhexamethylenesebac acid amide polycaprolactam and polyhexamethyleneadipic acid amide. The flowability of these preparations is so good that they may be formed by injection moulding, even if they have a very highasbestos content,approaching 80 wt.fr. The products are very tough, since, apparently, b^dregen bonds are formed between asbestos and the polyamide. Therefore, compositions containing asbestos fibres have better mechanical properties than those with glass fibres. 384 BRITISH PATENT 1,024,658. IMPROVEMENTS IN LAMNAT2B SHEET MATERIALS. The Euberoid Co., II.Y. U.S.A. A material according to this invention is characterised in that the asbestos felt is impregnated with 15fr to 25fr by weight of polychloroprene or acrylonitrile or both. ASARCO ALV 0005800 ASBESTOS BULLETIN 107 385 INITIAL EVALUATION 0? ASBESTOS LAMINATES BONDED WITH POLY BENZYL RESIN. Royal Aircraft Establishment, Parnborough. B.J.C. Moore,London Llin.of Aviation, Dec.1963, 24p. The preparation of a thermosetting resin from benzyl chloride and paradichlorcxylylene is described. The flexural and tensile strengths and modulus of elasticity of asbestos laminates are examined on aging the elevated temperatures and a comparison is made with the convent ional phenolic bonded materials. Variation of the resin preparation to give different crosslink densities is also investigated. It was found that the polybenzyl laminated had superior retention of mechani cal properties after exposure to elevated temperatures and after immersion in alkali solutions. 386 GERMAN PATENT 1,214,476. HIGH TEMPERATURE-RESISTANT MAT: L FCR THE CONSTRUCTION OP OR PROTECTIVE COATINGS POR ROCAE BODIES OR COMBUSTION CHAMBERS. Haveg Industries Ir.c, These materials consist of 40-65f= of a resinous matrix, of phenolformaldehyde resins (preferably), epoxy resins such as resins derived from biqphenol-A-epichlorohydrin, or other thermosetting- resins, and 35 - 6C?i of hard short asbestos fibres oriented circularly with respect to the rocket -axis. Antophyllite asbestos is preferred, but amosite and chrysotile asbestos can also be used. Catalysts or hardening agents, such as hexamethylenetetramine are employed. 387 BELGIAN PATENT 671,703. ^- ATx.jV_Ti 77P - r j. Lr^TtQO I.C.I. cf Australia and Ze land Ltd. Compositions used in extruding tubes and joints are produced by poly-, nerising 80 - 100 pts. of a monomer, preferably vinyl chloride with 0 - 20 pts. of an ethyienically unsaturated monomer, e.g. vinyl acet ate or vinylidene chloride, in an aqueous medium in the presence of fibrous asbestos previous^ dispersed in water with an anionic or cationic surfactant. Catalysts are used in the polymerisation pro cess, and pLasticisers may be added. 388 BRITISH PATENT 1,011,239. SHEET MOULDING METHOD.Parker-Knoll. This invention relates to the moulding of sheet material impregnated with a thermosetting resin,particularly thermosetting phenolic resin. The invention is particularly concerned with the moulding cf resin impregnated asbestos fibre sheets. 389 BRITISH PATENT 1,008,803. A PROCESS POR THE PRODUCTION OF FLEECES.Deutsche Gold-una Silber-Scheideanstalt Vormals RoessloJ A process wherein the fibre(e.g.asbestos)and the organic monomer are emulsified in the presence of a polymer or copolymer of the organic compound. .1 ASARCO ALV 0005801 103 ASBESTOS BUUlZil IN PAST 6. BUILDING MATERIALS AND PLASTIC PIPES. 390 U.S. PATENT 3,184,428. PREVENTION OP COLOURED IRON COMPOUNDS IN ASBESTOS-CONTAINING POLYVINYL CHLORIDE RESINS. A. C. Hecker, S. Cohen, M. '!!. Pollock, Argus Chemical Corp. Floor tile and similar compounds based on asbestos-filled PVC and containing iron contamination are bleached by addition of an organic nitrogen compound of the type described, which is compatible, non volatile and heat stable. Examples of the colour-protecting agent are aicyandiamide, melamine, guanidine carbonate ana stearoguanamine. 391 PLASTICS PROGRESS IN THE BUILDING INDUSTRY IN THE BRITISH COMMONWEALTH. B. C. Aldis. Society of the Plastics Industry Inc. New York, 1964, p.9. SP1 National Plastics Conference, N.Y. June, 1964. This paper discusses statistics, the materials used in building, developments in the U.K., uses in the Commonwealth and the future plastics in the field of building. "09 FRENCH PATENT 1,406,403. MOULDED PARTS. Badiscne Anilinund Soda-Fabrik. Moulded parts suitable for kerbs etc., are produced from bitumen, high pressure polyethylene and ethylene copolymers and mineral fillers, such as comminuted rocks, sand, basalt flour, granulated granite and fibrous asbestos, glass and the like. 'Also organic fillers can be used, such as wood fibres or cork powder. 393 FRENCH PATENT 1,389,133. INCREASING THE SETTLING TIME OF GYPSUM BY ADDITION OF CAE30XYMETHYLCELLUL0SE. N.van Herck. Carbcxymethylcellulose retards the setting time of gypsum in composit ions such as mortars or wall coatings containing a mixture of sand and gypsum with water. If the carboxymethylcellulose content exceeds 0.75$, it is recommended to add asbestos fibres to prevent crack formation. 394 CANADIAN PATENT 644,673. FIBRE-REINFORCED BITUMINOUS PIPE. Perraa Tubes Ltd. Pipes of improved strength are produced from a mixture of 60 - 80 wt.$ of molten asphalt, 10 - 20$ of glass fibres and 10 - 20$ of a mixture of short asbestos fibres and pulverised limestone. The mixture is continuously extruded through a die into a vacuum chamber to form aiping, which is cooled by a cooling medium, and cut off into desired lengths. ASARCO ALV 0005802 r asbestos bulletin 395 RUSSIAN PATENT 177,318. R. I. Arav et al. 109 PRODUCTION OP STRUCTURAL ELEMENTS. A process for producing structural elements from a mixture of mag nesium hydroxide and carbonate trihydrate with asbestos fibres con-0 prises forming the elements from the mixture, heating them at 80-90C and drying first at 110-130C and then, for six. hours, at 300C. This method results in lowering the bulk density of the product and its heat conductivity. 396 PRELIMINARY PROCESSING OP AS3SST03 AS A PLASTICS PILLER AND ITS SORPTION PROPERTIES. A. 3. Davydov, Z. G. Ivanova, Plast. Massy, No.l January 1965, p.4-6-8 (trans.will appear in "Soviet Plast." No.l, January 1966). The type of asbestos, i.e. soft or hard and the preliminary treat ment have a marked effect on the reaction and sorption of orgr.nosilicen binder resins by this filler. 397 STABILISER EFFECT IN VINYL/AS3EST0S PLCOR TIIES. J. ?. Scullin, A. i'\ Plotcher. Mod.Plast. 43, No.3, Nov.1965, ?. 143-6, 148, 151, 229. The heat stability, curl, water growth, and colour of vinyl/asbestos floor tiles are effected by the chemical composition of the stabil iser used. Polyols (glycerol, sorbitol, pentgoryrhritol, and dipentnerythritol) and nitrogen compounds (melamine dicyandiamide, and benzoguanamine and urea) were tested and it was shown that no single stabiliser gives the optimum combination of properties. Combination of stabilisers, especially designed for each formulation are indicated. 9 refs. 398 3RITISH PATENT 1,021,649. i PIRE RESISTANT 300?.. Padde rty. Ltd. PART 7. ASBESTOS PACKING.COATING AND SEALING COMPOSITIONS. 399 EAST GERMAN PATENT 45,455- PRODUCTION OP COLD-HARDENING ELASTIC SEALING MASSES. K.Beltsig and A. Becker. Sealing compositions for structural purposes,especially suitable for packing joints of variable spacing and for coating concrete to rouuer it water-or oil-proof,comprise as a binder epoxidised phenol rosins plastified and rendered elastic by the addition of e.g.butyl phihalate or of soft resins based e.g. on esters of phthalic acid or adipic acid,Various organic or inorganic fibres(including asbestos)pigments or fillers can be added. Polyamines,such as dipropylene- or diethy lene-triamine, are used as hardeners for the resinous binder. ASARCO ALV 0005803 ^11 110 ASBESTOS BULLETIN 400 CANADIAN PATENT 645,037. WATER-LAID ASBESTOS SHEETS. Armstrong Cork Co. An aqueous slurry of chrysotile asbestos fibres is treated with a dye of the aso-, phthalocyanine-, thiazole-,nitrous-type or the like, which reacts with the surfaces of the chrysotile asbestos fibres rendering them receptive to the deposition of a rubber latex, which is subsequently added to the dye-treated slurry. 401 JAPANESE PATENT 26203/65- MANUFACTURE OF AS3ESTCS FIBRE SHEETS BOUND WITH LATEX. U.S.Rubber Co. Sheets comprising a fibrous material consisting partly or wholly of asbestos are produced by adding a synthetic latex containing a butadiene-styrene or -acrylonitrile copc?:.ymer, or neoprene, in ad mixture with a rubbery carboxylate polymer, to an aqueous slurry of the fibres, and then removing water to form bonded fibre sheets. -02 JAPANESE PATENT 3391/66. WATERPROOF MATERIAL. Y. Sure. r--P''TTT"T"n This material, having improved tight-sealing properties and weathering resistance, is produced by dissolving a xylene-formaldehyde resin in a vegetable oil, e.g. linseed oil, and incorporating in the resulting solution an inorganic filler, such as titanium dioxide, zinc oxide, litharge, asbestos, bentonite etc. The xylene-formaldehyde resin can be modified with resin, epoxides, phenols etc. 403 COLD-TYPE MASTICS 3ASED ON A EUEBEE-BIIUIOSN BINDER 0. A. Erasnovskaya et al. Stroit.Llat. 1966, 12, No rsn : -28 For sealing joints in underground drainage system, such as sewers, mastics which can be applied in the cold are much more practical than those which require heating. Suitable compositions developed by the Kauchno-Issledovatchnyi Institut Asbestesmenta are based on rubber bitumen binders comprising regenerated tyre rubber and bitumen, with addition of mineral oils as plasticisers. As a filler, asbestos of grade 7 is. used in amounts of 13 - 15r=. Details of the production and properties of several mastics of the cold-type are given. 404 BRITISH PATENT 1,023,425. GASKET MATERIALS. Minnesota Mining & Manfg. Co., Delaware, U.S.A. This invention relates to inorganic non-metallic gasket material for use in high-tenperature environments. ASARCO ALV 0005804 A33S3T0S BULLETIN 111 405 POLISH PATENT 50,296. ELASTIC PUTTY. A. Lendzion et al. Elastic putty suitable for slab and block structures is produced by heating at 80-120C a mixture consisting of (in weight parts) a linseed oil base alkyd resin or a polymerised linseed-tun oil 10-100, and a lead-manganese siccative 1-10, and admixing to the mass obtained 10-200 wt.pts. of a fibrous mineral filler, preferably asbestos powder, 2-20 wt. pis. of an inorganic pigment, e.g. zinc oxide, and optionally 5-100 wt. pts. of coumarone resin. 406 CANADIAN PATENT 697,651. MASTIC COATING COMPOSITIONS. Benjamin Poster Co. Heat-and acid-resistant mastics comprise a petroleum fraction ,condensation product derived from paraffin-base crude oil residues a chlorinated polyphenol, a copolymer of chlc.rosulphonated poly ethylene or hexafluoro-propyiene-vinylidene fluoride, an organic derivation of a montmcrillcnite clay as a gelling agent, and one or more fillers, especially asbestos fibres or floats, mica r-na ta 1C. This composition is especially useful for coating industrial chimr..eys exposed to acidic gases and water vapour from fuel combusion. PANT 6. ASBESTOS PAPER AND INSULATING NATE! ,S. 407 CANADIAN PATENT 639 , 566 PiLi'ERS. Kimberley-Cla Pi it er paper capable of 0D3 rati . 10 w-oressure--d rop acr 033 the fiIter is manufactured from a plurality of tissue we bs wate VI-- *1 p id f by d ry weight of chrysotile asb eter of 0.05 - 1 .5 microns and 408 BELGIAN PATENT 669, 376. An insulating plate, particularly for lifting ingot moulds, comprises fibrous asbestos containing less than 6? water, preferably in the form cf bundles of amosite, crocidolite, anthophyllite or tremolite asbestos fibres, and a binder. 409 GERMAN PATENT 1,215,570. FIHE-RETARDING INSULATORS. J. K. Snitker. Fire-retarding insulating plates or shaped bodies are produced from a mixture of 30 - 70 parts of asbestos wool and 30 - 70 parts of expanded cork particles, optionally with addition of up to 25$ of fillers. The mixture is coracressed to eliminate air channels. ASARCO ALV 0005805 '112 ASBBS2J0S BULLETIN 410 NETHERLANDS APPLICATION 6,414,881. FILM-FORMING THERMO PLASTIC MATERIALS. Union Carbide Corp. Film-forming materials suitable as a substitute for paper are oroducefi from a thermoplastic mixture containing: (1) polyethylene; {2) a. copolymer of ethylene with a vinyl compound, such as styrene, vinyl chloride, vinyl acetate, ethyl acrylate, acrylic acid and/or propy lene; (3) a finely divided siliceous filler, such as diatomaceous earth, silica, siliea-alumina, asbestos or the like; and (4) a nonmodified polystyrene. The white film produced from this mixture has excellent paper properties. 411 GERMAN PATENT 1,216,176. MICA LAMINATES FOR ELECTRICAL APPLICATIONS. Licentia Patent-Verwaltungs G.n.b.H. Laminates for electrical applications comprise a layer of mica paper or mica flakes, an intermediate layer of a material comprising asb estos fibres, and an outer layer of a material comprising glass fila ments or fibres. 412 CANADIAN PATENT 646,160. LIGHTWEIGHT INSULATION BOARS. J ohns-Manvilie Perlita Corp. A moulded lightweight thermal and acoustical insulation board is produced from a homogeneous mixture of about 48 wt.% of expanded perlite, 24% of short asbestos fibres, 8% of kraft fibre or pulped newsprint, and 20% of either asphalt or a 6-10 Be sodium silicate solution. The product nay withstand temperatures of 800 - 1200JP. 7/he re the temperature to be encountered is lower asbestos fibres nay be replaced partly or fully by vegetable fibres. 413 FRENCH PATENT 1,393,925- SOUND-PROOFING COATINGS. Revertex Ltd. Sound-proofing coatings which are applied on metal sheets by fusion comprise a sound-proofing layer of a resinous or bituminous material, optionally containing fillers, and an adhesive layer of an acrylic latex. The sound-proofing layer may contain coumarone, indene, counarone-indene, styrene-indene resins, glycerol ester of abretic acid and/or bitumen; suitable fillers include silica, powdered fibrous asbestos, carbon block, etc.; plasticisers may also be added. 414 BRITISH PATENT 1,006,109. HEAT INSULATING OR FIRE PROTECTING DEVICES. E. Mead, A. V. Donaghy. Rolls-Royce Ltd. Bells Asbestos & Eng. Limited. ASARCO ALV 0005806 H "1*1'nffwiim ii "f,M' W'l " - v i T asbestos bulletin 113 PART 9. REFRACTORY FIBRES. 415 FI3RS-REINF0RCED COMPOSITE MATERIALS. M. Faethe. Neue Hutte, 1966, 11, Wo.3, 144-146. Theoretical aspects of the reinforcement of metals with ceramic whiskers or refractory metal filaments are discussed. Examples quoted include, inter alia, metallic composites comprsing alumina and silicon nitride whiskers; graphite fibres; molybdenum, tungsten or steel filaments etc. Applications of fibre-reinforced metals are described. 416 FRENCH PATENT 1,419,728. SILICON CARBIDE FIBRES. Corning Glass Works. An apparatus and method are described for the preparation of crystalline cubic silicon fibres having a length of 7.5 cm. or more. They are prepared from a mixture of carbon and silica at a temperat ure" between l375^C and 1550 C, in an atmosphere of nitrogen and hydrogen. 417 RECENT ADVANCES IN ALEHINA VUE IR TECHNOLOGY. A.P.Levitt. Materials Research Sc Standards 1966, 6, No.2, 64-71. A continuous process for alumina (AloO-) whiskers is described. The process involves a high-temperature tl200cC) gas-phase oxidation of aluminium chloride by reaction with carbon dioxide and hydrogen. Alumina whiskers grow on gas-borno alumina nuclei or stationary alumina substrates. Pilot plant studies indicate that a full-scale production should lower the cost of alumina whiskers to loss than one-tenth of the present value. The same apparatus with appropriate chemical reagents can be used to grow silicon nitride and silicon dioxide whiskers. Conditions for using whiskers as reinforcement for plastics and metals are discussed. Experiments have shown that the adherence of pure nickel to alumina is poor, but addition of other metals to nickel, especially chromium, greatly improve the bending. 418 GERMAN PATENT 1,214,657. PRODUCTION OP SPINTTA3LE ALUMINIUM SILICATE PIBRES HAVING A IvIULLITE STRUCTURE. Du Pont de Nemours. Silica or a silicon dioxide-containing compound is heated with aluminium or its sulphide, oxide or halide, and with sulphur, or a sulphur compound, at 800-1200C in an inert atmosphere containing at least 1 of hydrogen. The fibrous material produced is separ ated from non-fibrous materials by known methods. {. ............. .......... .. -- 1W "! W - ,i"'- V^, ASARCO ALV 0005807 114 ASBESTOS BULLETIN 419 FRENCH PATENT 1,424,994. REFRACTORY FIBRES. Bibcock t Refractory fibres having crystalline structure are produced by concentrating a solution of one or several salts until the solution becomes viscous, drawing the solution to form fibres, drying the fibres to remove the solvent and then calcining them to decompose the salts to the corresponding metal oxides. By this inexpensive method, fibres of a diameter of 1 - 7 microns can be produced con sisting of e.g. alumina AIjC^.PjOk, zirccnia, magnesia, thogia etc. or mixtures thereof. Alumina fibres can be used up to 1820 C, and zirconia fibres to 220QC. ' 420 FIBROUS CARBON. 0. Vohlor and E. Soerk. Ber. Ltsch.Keram. Ges., 1966, 43, No.3, 199-208. A survey is given of the developments cf carbon fibres, their production from cellulose-synthetic polymer-and animal fibres, properties and applications of the products. Processes of the carbonisation of various fibres are discussed in detail, and the formation of pyrocarbc:: whiskers is described. 29 references. PART 10. HIS CELLANECUS. 421 FRENCH PATENT 1,398,545. NEUTRAL CR BASIC REFRACTORY BRICKS. Oesterreischisch-Anerikanische Hagnesit,A.C-. Haguesiurn. oxide or chromite bricks are provided with a U-shapci in sert made of a.n oxidisable metal and filled in between the logs of the U with a combustible material such as cardboard,or a compressible material such as asbestos,to compensate for expansion due to h-rating or infiltration of slag and powders. These materials can also be applied by means of adhesives to one or both of the internal faces of the bricks. 422 FRENCH PATENT 1,432,582. BRICKWORK KILNS. J.T.Lepeiletier. A kiln is described comprising an inner refractory wall sloping out wards and straightening in the upper part/which is built of refract ory bricks without mortar. Seals at the level of the slabs making up the roof of the kiln are made of asbestos cords and packed,if necess ary, with amosite. 423 CANADIAN PATENT 640,099- AIR WASHER FOR ASBESTOS FIBRE. Denovan Ltd. An apparatus is described for removing dust particles and extremely fine asbestos fibres from milled asbestos by the action of an air stream on asbestos fibres passed on a conveyor through a housing pro vided with an air lock inlet and outlet. j 1 i ASARCO ALV 0005808 ASBESTOS BULLETIN 115 424 FRENCH PATENT 1,422,580. FIFB-EXTI/fGUISKING rCV/DER. VEB Fener-Loschgeratewerk Neuruppin. Fire-extinguishing pcr.vder consisting of salts known fcr their extin guishing power, such as ammonium sulphate and meno-or diannonium phosphate are rendered free-flowing and hydrophobic by the addition of 5-10 wt./i of a mixture of a ere so 1-formaldehyde resin and asbestos powder, 35" of tricalcium phosphate and 2/i of magnesium stearate. PART 11. PE7IE?.7 OF JOURNALS. "ASBESTOS", April 1966. SC7 V,'e stern Saving Fund Bldg., Philadelphia, Penn. 19107. 425 THE BENEFTCIATION OF ASBESTOS ORE. *.?. S. Sinclair, p.2. 426 L./M GLASSErSTOS LAGGING CLOTHS. Two F.aybestcs-Ivianhattan lang-ng cloths have been approved by the United States Coast Guard as incombustible materials for installation as steam pipe insulation on both merchant and military vessels, p.10. 427 LEAD-ASBESTOS PALS-At Sloar.c Square, London, a new office and apartment building will resc on 29 lead-asbestos anti-vibration pads, p.16. 428 BUILDING, p.20.~ 429 MARKET CONDITIONS, p.22. 430 PRODUCTION. d. 20. 431 IMPORTS & BAT CRTS, p.22. 432 ASBESTOS PATENTS. Extracts cf three Patents related to ins ulati on, p. 50. "ASBESTOS", MAY 1966. 433 BRITISH ASBESTOS INDUSTRY-PART 1, C. Z. Carroil-Porczynski, written at the request of British Government Central Office of Information. 434 AUTCMOBILE SALES, n.22. 435 BUILDING, p,26. 4 36 MARKET CONDITIONS, o.30. 437 PRODUCTION, d. 34. 438 I;,MOLTS & EXPORTS, p.36. 439 INDUSTRY NE7S, p.40. I ( ASARCO ALV 0005809