Abstract:
Substantially linear, amorphous, unsaturated, high molecular weight copolymers of at least one monoolefin selected from ethylene and higher alpha-olefins, with 1, 4, 9-decatriene, alkyl, aryl, and arylalkyl-substituted 1, 4, 9-decatrienes, or 1, 5, 9-decatriene, are disclosed. The copolymers are sulfurvulcanizable to useful synthetic eleastomers. A process for obtaining the copolymers by copolymerizing a mixture of the selected monomers in contact with catalysts prepared from certain transition metal compounds and organometallic compounds or hydrides of Group I to III metals is also disclosed.
Abstract:
New and novel copolymerizates of ethylene and/or aliphatic alpha-olefins containing three to eight carbon atoms with nonconjugated diolefins containing at least one terminal unsaturation of vinyl type are disclosed. The copolymerizates are obtained by copolymerizing nonconjugated aliphatic diolefins containing at least one vinyl unsaturation and from five to 15 carbon atoms with ethylene or with ethylene and aliphatic alpha-olefins containing three to eight carbon atoms in the liquid phase but in the absence of halogenated aliphatic hydrocarbons, with a catalyst prepared from particular vanadium compounds and alkyl aluminum halides, both the preparation of the catalyst and the copolymerization being carried out a temperature between -80*C and +10*C.