| 摘要 |
1288259 Polychloroprene compositions E I DU PONT DE NEMOURS & CO 27 Oct 1969 [31 Oct 1968] 52522/69 Heading C3P [Also in Divisions C2 and C5] Chloroprene polymers and copolymers are stabilized against ozone by addition of 1-15 parts, per 100 parts of polymer, of an alpha, omega-bis-cyclopentadienyl compound of formula in which n is 1-10 and X is one of a variety of defined divalent hydrocarbon or oxygeninterrupted hydrocarbon radicals. Other compounding ingredients are clay, furnace black, MgO, TiO 2 , petrolatum, process oil, 2,2<SP>1</SP>- methylene bis-(6-tertbutyl-p-cresol) and conventional vulcanizing components. |
