Process for producing a solution of diene polymers in vinyl aromatic compounds and for producing impact-resistant vinyl aromatic polymers by polymerizing this solution

摘要

Disclosed is a method for the production of a solution of high molecular polymers of conjugated dienes in a vinyl aromatic hydrocarbon by anionic polymerisation of said diene in the presence of an alkyl lithium catalyst. The invention also relates to a method for the production of resistant polymers of vinyl aromatic compounds. The process consists of initially polymerizing the diene in an aromatic solution consisting of a hydrocarbon which is devoid of any ethylene double bonds, until a molar mass of less than 105 is obtained. Thereafter, trialkyl aluminium with a higher molar mass than the alkyl lithium is added. The solution thus obtained is then diluted with a vinyl aromatic compound; thereafter, the polydiene is coupled to a polyepoxide or an alkyl(meth)acrylate to form a higher molecular polymer. The resulting solution is further treated to form a resistant polymer of a vinyl aromatic hydrocarbon, whereby the solution produced according to the above-mentioned process is polymerised in a known manner per se, optionally after further amounts of a vinyl aromatic compound are added.