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发明授权
US4767833A Transparent, impact-resistant, thermoplastic resin composition having excellent chemical resistance and process for producing same 失效
具有优异耐化学性的透明，耐冲击，热塑性树脂组合物及其制造方法

Transparent, impact-resistant, thermoplastic resin composition having excellent chemical resistance and process for producing same
摘要：
A thermoplastic resin composition obtained by graft-polymerizing 95 to 50 parts by weight of a monomer mixture comprising a vinyl aromatic compound monomer and an acrylic compound monomer and optionally a vinyl cyanide compound monomer in the presence of 5 to 50 parts by weight of a rubbery substance consisting of styrene-butadiene copolymers, characterized in that the rubbery substance comprises (A) 40 to 80% by weight of a styrene-butadiene copolymer having a number-average particle diameter of at least 0.05 .mu.m and less than 0.2 .mu.m, a gel content of 30 to 100% by weight and a bound styrene content of 10 to 40% by weight and (B) 60 to 20% by weight of a styrene-butadiene copolymer having a number-average particle diameter of 0.2 to 3 .mu.m, a gel content of 10 to 80% by weight and a bound styrene content of 10 to 40% by weight and the total content of the components (A) and (B) in the rubbery substance is at least 80% by weight. Said thermoplastic resin composition is superior in chemical resistance, transparency, impact resistance and product appearance.
摘要（中）：

一种热塑性树脂组合物，其通过在95〜50重量份的含有乙烯基芳族化合物单体和丙烯酸类化合物单体的单体混合物和任选的乙烯基氰化合物单体的存在下，在5〜50重量份的橡胶状 由苯乙烯 - 丁二烯共聚物组成的物质，其特征在于，所述橡胶状物质包含（A）40〜80重量％数均粒径为0.05μm以上且小于0.2μm的苯乙烯 - 丁二烯共聚物， 凝胶含量为30〜100重量％，结合苯乙烯含量为10〜40重量％，（B）60〜20重量％的数均粒径为0.2〜3μm的苯乙烯 - 丁二烯共聚物 m，凝胶含量为10〜80重量％，结合苯乙烯含量为10〜40重量％，橡胶状物质中组分（A）和（B）的总含量为至少80重量％。 所述热塑性树脂组合物的耐化学性，透明性，耐冲击性和产品外观优异。

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