MULTI-COMPONENT ETHYLENE COPOLYMERS, PROCESS FOR THEIR PREPARATION, AND VULCANIZATE THEREOF
申请人:SHOWA DENKO KABUSHIKI KAISHA
公开号:EP0181408A1
公开(公告)日:1986-05-21
Multi-component ethylene copolymers comprising: (a) 50 to 94.8 mol % of -CH2-CH2-; (b) 5 to 45 mol % of a compound of formula (1), (wherein R, represents H or methyl and X represents formula (II) or formula (111), wherein R2 and R3 each represents an alkyl group containing 1 to 10 carbon atoms); and (c) 0.2 to 5 mol % of a monomer containing an ethylenic double bond capable of undergoing radical polymerization and at least one carbon-carbon double bond other than an aromatic double bond, can be easily vulcanized, and the resulting vulcanizates are rubbers having excellent oil and heat resistances. The multi-component ethylene copolymers can be obtained by copolymerizing a monomer having unit (a), a monomer having unit (b), and a monomer (c') having an ethylenic double bond capable of undergoing radical polymerization and an acid anhydride group, a carboxyl group and/or an epoxy group, and modifying the obtained copolymer with a low-molecular modifier selected from among unsaturated amines and unsaturated alcohols having at least one carbon-carbon double bond other than an aromatic double bond. When a radical-polymerizable monomer having an epoxy group is used, an unsaturated carboxylic acid having at least one carbon-carbon double bond other than an aromatic double bond may be used as the low-molecular modifier.
多组分乙烯共聚物包括:(a)50 至 94.8 摩尔%的-CH2-CH2-;(b)5 至 45 摩尔%的式(1)化合物,(其中 R 代表 H 或甲基,X 代表式(II)或式(111),其中 R2 和 R3 各代表含有 1 至 10 个碳原子的烷基);以及(c)0.2至5摩尔%的单体,该单体含有能够发生自由基聚合的乙烯双键和至少一个除芳香族双键以外的碳碳双键,可以很容易地进行硫化,所得到的硫化胶是具有优异耐油性和耐热性的橡胶。将具有单元(a)的单体、具有单元(b)的单体和具有可进行自由基聚合的乙烯双键的单体(c')与酸酐基团、羧基和/或环氧基团共聚,然后用选自不饱和胺和不饱和醇中的低分子改性剂对所得到的共聚物进行改性,该低分子改性剂至少具有一个碳碳双键(芳香族双键除外),从而得到多组分乙烯共聚物。当使用具有环氧基团的可自由基聚合单体时,可使用除芳香族双键外至少具有一个碳碳双键的不饱和羧酸作为低分子改性剂。