公开(公告)号：US4195136A

公开(公告)日：1980-03-25

申请号：US945320

申请日：1978-09-25

申请人： Yasushi Sato ,  Toshio Ibaragi ,  Masanobu Ishihara ,  Makoto Honda

发明人： Yasushi Sato ,  Toshio Ibaragi ,  Masanobu Ishihara ,  Makoto Honda

IPC分类号： C08L53/02 ,  C08L51/04

CPC分类号： C08L53/02

摘要： The disclosure relates to a resin composition comprising (A) 75-98 parts by weight of a block copolymer mixture of vinyl aromatic hydrocarbon and conjugated diolefin and (B) 25-2 parts by weight of an impact-resistant styrene resin, characterized in that said copolymer mixture (A) is a mixture of a copolymer (1) and a copolymer (2) (the weight ratio of the copolymer (1) to the copolymer (2) is 1.5 or more), the copolymer (1) being a copolymer which contains 55-85% by weight of vinyl aromatic hydrocarbon, consists of at least one vinyl aromatic hydrocarbon polymer block and at least one conjugated diene polymer block, and has a number average molecular weight of about 10,000 to about 500,000 and the copolymer (2) being a homopolymer of vinyl aromatic hydrocarbon or a copolymer which consists of at least one vinyl aromatic hydrocarbon polymer block and at least one conjugated diene polymer block, the vinyl aromatic hydrocarbon content of said copolymer being 75% by weight or more and at least 5% by weight higher than that of the copolymer (1), said homopolymer or copolymer having a number average molecular weight of about 500 to about 130,000, both of said copolymer (1) and said copolymer (2) being obtained by polymerization in an inert organic solvent with an organolithium compound as a catalyst; and that said impact-resistant styrene resin (B) is a polymer obtained by graft-polymerizing 3-12% by weight of a rubbery conjugated diene polymer and 97-88% by weight of a vinyl aromatic hydrocarbon. The said resin composition is far superior to conventional resin compositions of similar type in balance between impact resistance and transparency.

摘要翻译： 本公开涉及一种树脂组合物，其包含（A）75-98重量份的乙烯基芳族烃和共轭二烯烃的嵌段共聚物混合物和（B）25-2重量份的耐冲击苯乙烯树脂，其特征在于 所述共聚物混合物（A）是共聚物（1）和共聚物（2）的混合物（共聚物（1）与共聚物（2）的重量比为1.5以上），共聚物（1）为 共聚物，其含有55-85重量％的乙烯基芳烃，由至少一个乙烯基芳族烃聚合物嵌段和至少一个共轭二烯聚合物嵌段组成，数均分子量为约10,000至约500,000，共聚物（ 2）作为乙烯基芳族烃的均聚物或由至少一种乙烯基芳族烃聚合物嵌段和至少一种共轭二烯聚合物嵌段组成的共聚物，所述共聚物的乙烯基芳烃含量为75重量％以上， 所述共聚物（1）和所述共聚物（2）的所述均聚物或共聚物的数均分子量为约500至约130,000，所述共聚物（1）和所述共聚物（2）的至少5重量％通过聚合 惰性有机溶剂，有机锂化合物作为催化剂; 并且所述耐冲击苯乙烯树脂（B）是通过将3-12重量％的橡胶状共轭二烯聚合物和97-88重量％的乙烯基芳族烃接枝聚合而获得的聚合物。 所述树脂组合物远优于在耐冲击性和透明度之间平衡的类似类型的常规树脂组合物。