| 摘要 |
1385429 Vulcanizable elastomer mixtures CHEMISCHE WERKE HULS AG 22 June 1972 [24 June 1971] 29241/72 Headings C3P and C3Q Vulcanizable mixtures comprise (1) an elastomer and (2) 2 to 20% by weight of the elastomer of polyoctenamer and/or polydodecenamer in which the proportion of double bonds in the transconfiguration is greater than 60%. Preferred polyalkenamers have a reduced specific viscosity of 0À2 to 3À0 dl./g. in decalin at 135‹ C. and a trans content of 75 to 95%. The elastomer may be natural rubber, polyisoprene, a butadiene polymer or copolymer, e.g. with styrene or acrylonitrile, polychloroprene, or an olefin copolymer or olefin/diene terpolymer rubber. In examples polyoctenamer and polydodecenamer are compounded with natural rubber, polyisoprene, SBR or polybutadiene in the presence of carbon black, aromatic plasticizer oil, zinc oxide, stearic acid and vulcanizing ingredients, and the compositions vulcanized. |
