Document LgVJ405oGMRYD1O6Vd0qq7q93

FILE NAME: Chemical Abstracts (CHAB) DATE: 1939 DOC#: CHAB018 DOCUMENT DESCRIPTION: Book Originally Published in 1939 by Wedler . \Y$9 9487 Chemical Abstracts 9488 Vol. 33 load, the points obtained fall approx, on a straight line. 1 plants (Barthlmy) 23. Acrylic resins in safety glasses If this line is extended to zero rate, it gives the " yield (Grassin) 19. value," which is the max. load which, theoretically, would produce no movement of the plunger. Stickiness is Wedler, Hans-W. : Klinik der Lungenasbestose. measured by detg. the load required to withdraw a knife Klinische, statistische und rntgenologische Ergebnisse aus from the putty in a given time. H. M. Stark Reihenuntersuchungen an Asbestarbeitern ber Krank An Improved method for the determination of the screen heitsbild und Verlauf der Asbestose. Leipzig: G.Thieme. residue in clay. C. A. Carlton. Rubber Age (N. Y.) 152 pp. M. 6.50. Reviewed in J. Ind. Hyg. Toxicol. 49, 275-6(1939).--A mixt. of clay (100 g.), aq. Na^PjO, 2 21,319(1939). (25 cc. of a soln. contg. 20 g. of Na^jCh per 1000 cc.) and water (375 cc.) is stirred in a high-speed stirrer Plastic masses. G. S. Petrov, A. G. Golubkova and (Hamilton-Beach Model No. 25 or A. S. T. M. stirrer for V. K. Kozlova. Russ. 51,584, Aug. 31, 1937. Organic Method D-422) for 7 min., poured onto a 325-mesh screen fillers are satd. with an aq. alkaline soin, of urea-aldehydic (previously wet) slowly with a stream of water, washed resins, NH( salts of aromatic monobasic or dibasic acids through and detd. in the customary way. By preliminary and an excess of NHj. _ wetting of the clay and with a peptizing agent, time is Synthetic plastic products. I. G. Farbenind. A.-G. saved, the results are more precise and can be duplicated (Rudolf Schrter and Wilhelm Becker, inventors). Ger. by different labs., and the life of the screen is prolonged. 3 676,062, May 24, 1939 (Cl. 395. 4.03). Addn. to 675,401 C. C. Davis (C. A . 33, 55451). Practically odorless plastic products Transparent foil. Julian Buchwic and Jan Sachs. are obtained by the action of an alkali, alk. earth or NH, Przeglad Tech. 77, 475-80(1938).--A review. E. A. A. polysulfide on an acetal or mercaptal contg. at least 2 Physical-chemical properties of the elastic high-fre halogen atoms linked to different C atoms. Examples quency waves. Physical catalyzers. Ultrafiltration and are given of the manuf. of products from, inter alia, centrifugal ultrasound waves. N. Marinesco. Gtnie formaldehyde bis(/3-chloroethyl) acetal, butyraldhyde civil 113, 317-22(1938) --A review of recent investigations bis( (S-chloroethyl) acetal and formaldehyde bis(/3-chloro- and their application in industry. Ann N. Hird ^ ethyl) mercaptal. Molding compositions. _ Roelf A. van Linge. . Brit. The use of sulfur dioxide. Wm. D. McNally. Ittd. 506,553, May 31, 1939. See Dutch 44,502 (C. A. 33, Med. 8, 234-8(1939).--SOj can be detected by odor in a concn. of 3-5 parts per million; 8-12 parts causes irrita 3487). , tion ef the throat and 20 parts irritation of the eyes and Urea-formaldehyde molding-powders. James M. Wal ter and Imperial Chemical Industries Ltd. Brit. 506,003, coughing. For prolonged exposure a max. of 10 parts May 19, 1939. An ester of HsP 04 in which all the re may be withstood; for 0.5-1 hr. 50-100 parts and for placeable H atoms of the acid are replaced by equiv. short exposures 400-500 parts. Workmen become habitu radicals, other than Ph,PO< and MejPO<, is incorporated ated to the inhalation of SOi. No permanent injury as accelerator during or after the production of molding follows long exposure to small concns. or sudden exposure 5 powders of the urea-CHiO type. Stabilizers, e. g., NH, to high concns. James C. Munch carbonate or carbamate, may be incorporated. In ex Products made by sulfonating fats and (higher) alcohols amples, the sirup obtained by heating urea with CHiO and their use in cosmetic articles. H. Fiedler. Fetle u. at pH 7.5-8.0 is incorporated with paper pulp, dried and Seifert 46, 35-6(1939).--Formulas are discussed. ground with Zn stearate, cyclohexanol stearate and (1) J. W. Perry Et|PO<, (2) Monastral Blue and MejEtPO, and (3) Cd Modern paint removers. Fritz Ohl. Seifensieder-Ztg. yellow and tritolyl phosphate. In Brit. 506,004, May 65, 1031-3(1938).--Cellulose dcrivs. (e. g., nitrocellulose, 19, 1939, MejPCh is added as accelerator to urea-CH,0 inethylcellulose, cellulose acetate or glycollatc) or com- 6 molding powders during or after their production. _ binations of phenol resins and A1 soaps are recommended Mold materials. Ren F. J. Ricard. Brit. 506,770, as thickeners and evapn. retarders. Choice of proper June 5, 1939. Material for making or coating molds and solvents for use in removing various types of finishes is cores for casting Ni-Al-steel, stainless steel, Mn steel, discussed at length. J. W. Perry bronze or other metal comprise foundry sand, graphite The efficacy of naphthalene, paradichlorobenzene and and hardenable synthetic resin, e. g., such as described hexachloroethane as insecticides for the control of the in Brit. 409,397 (C. A . 28, 6330), or alkyd resin, PhOH- clothes moth. Walter Frey. Arb. physiol, angew. CHjO resin or urea resin. . Enlomol. Berlin-Daklem 6, 189-97(1939).--Lab. tests on Polished molded products of casein composition. Daniel clothes moths ( Tineola biselliella Hummel) showed p- 1 Kasen. U. S. 2,168,127, Aug. 1. A method of producing dichlorobenzene (I) to be much more toxic to moths, a polished molded casein article comprises subjecting larvae and eggs than naphthalene (II) or hexachloroethane uncured casein material having a suitable water content for (HI); the latter is less toxic than H, even though it molding in a cool mold to the action of a polishing soin, vaporizes faster. The relative rates of vaporization are. (such as a 5-10% NaOH soin, or coned. HjSCh) capable II (balls) 0.225, n (flakes) 1, H (crystals) 1.03, IH of acting upon the uncured casein material to polish its (crystals) 7.96, I (granular crystals) 16.6. I should be surface, then heating the polished moldable casein material used for packing clothes in air-tight storage chests. If to render it plastic and subjecting it to pressure within a the material is to be stored for a long period of time H 8 cool mold to mold the article while preserving the polished (balls) should be used in conjunction with I. W. G. R. surface, the method being suitable for the production of Preparations for repelling foraging animals. Walter Meyer. Seifensieder-Ztg. 66, 689-90, 712-13(1939). Review of prepns. usable to prevent attacks of deer, rabbits, etc., upon shrubbery, etc. A. Guillaudcu Refractory concrete [heat-insulating agent] (Movslievich) 20. Vapor pressure and accommodation cocffs. of 4 nonvolatile compds.--vapor pressure of tri-m-tolyl phosphate over polyvinyl chloride plastics {Verhoek, Marshall) 2. Electrodeposition of synthetic resins (Gemant) 4. Tool steels for making molds (for pressing artificial masses) (Briefs) 9. Further notes on soybean oil and linseed oil [soybeans as source of moldable plastics] (Seve) 26. Occurrence of atin. Pb resulting from use of colored blackboard crayons (Ruf, Fluck) 26. Ten years experience in industrial sanitation in viscose-spinning articles such as sheets or rods. Molding articles such as buttons, etc., from powdered horn meal, casein, blood, glass or the like. Heinrich Skolaude. U. S. 2,169,665, Aug. 15. Various details of app. and operation. Phenolic resin molding compositions. Wm. b. flood and Geo. B. Howells (to Catalin Corp. of America). U. S. 2,168,981, Aug. 8. A method of producing molding compris, comprises treating more than 1.5 mois of CHjO with 1 mol of phenol in the presence of an alk. catalyst, rendering the mass slightly acid, dehydrating until the mass would gel on long-continued healing, mixing there with a substantial proportion of melted novolak resin resulting from the reaction of approx, equal mol. propor tions of phenol and CHjO in the presence of an acid catalyst, substantially neutralizing and permitting the