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1. 发明专利

SE340884B 未知
公开(公告)号：SE340884B
公开(公告)日：1971-12-06
申请号：SE640166
申请日：1966-05-10
申请人： POLYMER CORP
发明人： FISCHER E , KENT E
IPC分类号： C08L9/00 , C08L23/12 , C08L93/00 , C08D9/08 , C08D9/12 , C08F29/12
摘要： The hardening rate of synthetic trans-1,4 polymers of isoprene having at least 85% of the units in the trans-1,4 configuration, or copolymers containing at least 80 mole per cent of such trans-1,4 polymers of isoprene is increased by dispersing therein a minor proportion by weight of a crystalline resin having a softening point above that of the trans-1,4 polymer. The trans-1,4 polymer may be a polyisoprene or copolymer of isoprene with less than 20 mole per cent of butadiene, piperylene, styrene, ethylene or propylene, and having at least 85% of isoprene units in the 1,4 configuration. The resin may be alban resin, shlllac, trans-1,4-polybutadiene, a butadiene/piperylene copolymer, trans-1,4-polypiperylene 1,2-polybutadiene or isotactic polypropylene. The compositions may be formed by milling or by mixing in solution to form a concentrate of the resin in a minor proportion of the polyisoprene. In examples, trans-1,4-polyisoprene is mixed with (I-IV) trans-1,4-polybutadiene, (V) a crystalline butadiene/piperylene copolymer, (VI) alban resin, (VII) shellac and (VIII) isotactic polypropylene.

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