申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0258040A1
公开(公告)日:1988-03-02
A thermoplastic synthetic resin composition having a flexural modulus as defined in JIS K7203 of from 500 to 15,000 kg/cm² is obtained by partial crosslinking upon melt kneading a mixture of by weight:
(A) from 20 to 60 parts of a polyamide resin; and
(B) from 80 to 40 parts of an ethylene copolymer comprising the units (a) 40 to 90% of ethylene, (b) 5 to 60% of an α,β-unsaturated carboxylic acid alkyl ester, and (c) from 0.3 to 10% of maleic anhydride or a partially ionized maleic anhydride; with
(C) from 0.01 to 20 parts, based on 100 parts by weight of the sum of the components (A) and (B), of a polyfunctional compound containing in its molecule at least two functional groups, e.g. an amino, epoxy, dihydrooxazolyl, carboxyl, carboxylic anhydride or hydroxyl group, which are reactive to a carboxyl, carboxylic anhydride or amino group.
The composition is moldable and the excellent moldings have impact strength at low temperatures, low heat distortion, and high tensile strength at break and have a good balance between mechanical properties and thermal properties.
一种热塑性合成树脂组合物,其弯曲模量在 JIS K7203 中定义为 500 至 15,000 kg/cm²,是通过部分交联熔融捏合按重量计的混合物而获得的:
(A) 20 至 60 份聚酰胺树脂;和
(B) 80 至 40 份乙烯共聚物,其单元包括 (a) 40 至 90%的乙烯,(b) 5 至 60%的α,β-不饱和羧酸烷基酯,和 (c) 0.3 至 10%的顺丁烯二酸酐或部分离子化顺丁烯二酸酐;与
(C) 以 100 份组分(A)和(B)的重量总和为基准,0.01 至 20 份的多官能团化合物, 其分子中含有至少两个官能团,如氨基、环氧基、二氢恶唑基、羧基、羧酸酐或羟基, 这些官能团可与羧基、羧酸酐或氨基反应。
该组合物可模塑,其优良的模塑物具有低温冲击强度、低热变形和高断裂拉伸强度,并且在机械性能和热性能之间具有良好的平衡。