Activation of a catalyst system for the polymerization was STERIOSPETSIFICHESKOY DIENES

摘要

1. A catalyst system "preformed" type for the stereospecific cis-1,4-polymerization of conjugated dienes based on at least: - one or more conjugated diene monomers intended for formation of pre - one or more salts of one or more rare earth metals audio or more acids selected from phosphoric acid, carboxylic acids and mixtures thereof, wherein the molar ratio of the conjugated diene monomer and salt of rare earth element is at least least 10 - of one or more alkylating agents, consisting of one or more aluminum alkyl compounds of formula AIRili HAIR, wherein R represents an alkyl radical and H a ​​hydrogen atom; - one or more halogen atoms donors representing alkylaluminum halides, one or more u compounds corresponding to the following formula (I) :, where Rdo from the group R, which may be identical or different, are selected from hydrogen atoms, linear or branched, saturated or unsaturated aliphatic, cycloaliphatic or aroma cally alkyl with the proviso that at least one of the groups of Rne Rdo represents a vodoroda.2. The catalyst system of Claim. 1, characterized in that the conjugated diene monomer intended for preforming is selected from butadiene, isoprene and their smesi.3. The catalyst system of Claim. 1 or 2, characterized in that the molar ratio of the conjugated diene monomer intended for preforming, and salts of rare earth element is in the range of from 10 to 80 and more preferably from 15 to 70.4. The catalyst system of Claim. 1, the differences