| 简介 |
The invention relates to a "preformed" activated catalytic system for the stereospecific 1, 4-cis polymerization of dienes conjugated base on at least one or more preformed conjugated diene monomers, one or more salts of one or more rare earth metals of one or more acids selected from an organic phosphoric acid, an organic carboxylic acid and a mixture thereof, one or more alkylation agents consisting of one or more alkylaluminiums of formula A1R3 or HA1R2, wherein R represents an alkyl radical and H represents a hydrogen atom, one or more halogen donors consisting of an alkylaluminum halide and one or more compounds having formula (I). |
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