申请人:ZEON CORPORATION
公开号:EP1650237A1
公开(公告)日:2006-04-26
There are provided a dip-molded product that has good resistance to organic solvents, good feeling, sufficient tensile strength, and high contact-state-sustaining performance, a dip-molding composition for forming the dip-molded product, and a dip-molding copolymer latex that can suitably be used for the dip-molding composition. The copolymer latex is a carboxylated acrylonitrile-butadiene copolymer latex that is produced by copolymerization of a monomer mixture of a specific composition comprising 1,3-butadiene, acrylonitrile and methacrylic acid, in which a part of the total amount of the acrylonitrile and a part of the total amount of the methacrylic acid are added to the polymerization reaction system at a specific time after the initiation of the polymerization and the content of methyl ethyl ketone-insoluble components in the resulting polymer is in a specific range. The dip-molding composition comprises the latex, a vulcanizing agent and a vulcanization accelerator.
本文提供了一种具有良好的耐有机溶剂性、良好的手感、足够的拉伸强度和较高的接触状态维持性能的浸塑产品,一种用于形成该浸塑产品的浸塑组合物,以及一种可适当用于该浸塑组合物的浸塑共聚物胶乳。共聚物胶乳是一种羧基丙烯腈-丁二烯共聚物胶乳,它是由 1,3-丁二烯、丙烯腈和甲基丙烯酸组成的特定组合物的单体混合物共聚而成、其中丙烯腈总量的一部分和甲基丙烯酸总量的一部分是在聚合反应开始后的特定时间加入聚合反应体系的,且所得聚合物中甲乙酮不溶物的含量在特定范围内。浸塑组合物包括胶乳、硫化剂和硫化促进剂。