By Robert C. Klingender
This quantity offers a unmarried resource reference for the layout of compounds utilizing elastomers which are warmth, oil, and gas resistant. those comprise polychloroprene, nitrile rubber, hydrogenated nitrile rubber, fluoroelastomer, polyacrylate, ethylene acrylic rubber, polyepichlorohydrin, chlorinated polyethylene, and different such strong point elastomers. The authors have integrated sections on antioxidants, antiozonants, vulcanization brokers, plasticizers, and strategy aids. The publication concludes with a bankruptcy on molding, delivering an instance of the various concerns focused on designing a rubber compound for a given software. This guide areas wanted info on the fingertips of skilled rubber compounders who desire to layout compounds which include strong point elastomers.
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Extra info for Handbook of Specialty Elastomers
Industrial hydraulic hoses, either medium- or high-pressure types, currently contain CR covers. For cost reasons, Robert C. 12 Comparing the Swell of CR, NBR, SBR, and NR in Various Fluids Chemicals Acetic acid, 10% Acetone Acetone ASTM fuel No. 3 ASTM oil No. 1 ASTM oil No. 1 ASTM oil No. 2 ASTM oil No. 2 ASTM oil No. 3 ASTM oil No. 3 Ethylene glycol Fatty acidb R 11 R 12 Glycerol Glycerol Methanol Methyl ethyl ketone Parafﬁnb Sulfuric acid, 25% Sulfuric acid, 50% Toluene City gasb Water, distilled Swelling Conditions CR NBRa SBR NR 508C, 12 weeks 208C, 20 d 308C, 20 d 508C, 28 d 708C, 28 d 1008C, 28 d 708C, 28 d 1008C, 28 d 708C, 28 d 1008C, 28 d 1008C, 20 d — 208C, 28 d 208C, 21 d 508C, 20 d 1008C, 20 d 508C, 20 d 208C, 28 d — 508C, 12 weeks 1008C, 12 weeks 208C, 28 d — 208C, 2=4 years E C–D D E B–C B–C C–D C–D E E A B–C E C–D A B C E B B–C E E A–B B=C E E E E A A A A C C A A E C–D A B C–D E A B E E A B=B E C–D D E D–E D–C E E E E A D E D A B B D–E D–E C E E C–D B=B E D D E E E E E E E A–B D E E A–B E B D–E D–E C E a C–D C=C Perbunan N 3310 Bayer AG.
A. C. , John Wiley and Sons, NY, pp. 1149–1184, 1971. 4. R. Johnson, ‘‘Polychloroprene Rubber,’’ Rubber Chem. , 49(3): 650, Jul–Aug, 1976. 5. W. Obrecht, Makromolekulare Stoffe Bd E 20 H. Bartl, J. Falke. (Methoden der organischen Chemie, Thieme Verlag Stuttgart, NY, S. 843–856, 1987 (in German). 6. W. Gobel, E. Rohde, E. Schwinum, Kautschuk þ Gummi, Kunststoffe, 25: 11, 1982 (in German). 7. R. Musch, Polychloroprene Grades with Improved Processing Behavior and Vulcanizate Properties (140). , 1991, Detroit.
The higher the loading of both ﬁller and plasticizer the higher the viscosity needed for satisfactory uncured strength. This approach is commonly used in hose and tubing, which requires good ‘‘green strength’’ to maintain shape, size, and to resist imbedding of reinforcing ﬁlaments in the tubing. If a compound design is based on a high ﬁller loading but a low plasticizer content, a low-viscosity polymer is needed. In addition, if injection or transfer molding is employed to produce the part then again a low viscosity is needed.