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1. 发明授权

US06410673B1 Ethylene/aromatic vinyl copolymer and molded product thereof 有权
标题翻译：乙烯/芳族乙烯基共聚物及其成型体
公开(公告)号：US06410673B1
公开(公告)日：2002-06-25
申请号：US09581812
申请日：2000-06-19
申请人： Toru Arai , Masataka Nakajima , Toshiaki Otsu , Takeshi Oda , Takanori Naoe , Yukiko Nishitoba
发明人： Toru Arai , Masataka Nakajima , Toshiaki Otsu , Takeshi Oda , Takanori Naoe , Yukiko Nishitoba
IPC分类号： C08F21202
CPC分类号： C08J5/18 , C08F4/65912 , C08F12/08 , C08F210/02 , C08J2323/08 , Y10S428/91 , C08F212/08 , C08F2500/03 , C08F2500/26 , C08F4/65927
摘要： An ethylene-aromatic vinyl compound copolymer characterized by satisfying the following conditions: (1) the aromatic vinyl compound content is from 0.5 mol % to 10 mol %; (2) as measured with respect to a molded product having a thickness of 0.2 mm, the haze is at most 14%, or the total light transmittance is at least 90%; (3) an ethylene-aromatic vinyl compound copolymer characterized in that the relation of the aromatic vinyl compound content and the glass transition point (Tg) obtained by an inflection point method as observed at a temperature of at least −50° C. by a differential scanning calorimeter (DSC), satisfies the following formula (1): −20+1.00St>Tg>−30+1.05St Formula (1) wherein St represents the aromatic vinyl compound content (molar fraction %) in the copolymer; and (4) the weight average molecular weight is from 140,000 to 500,000 when the aromatic vinyl compound content is from 5 mol % to 10 mol %, or from 60,000 to 500,000 when the content is from 0.5 mol % to less than 5 mol %.
摘要翻译：一种乙烯 - 芳族乙烯基化合物共聚物，其特征在于满足以下条件：（1）芳族乙烯基化合物含量为0.5mol％至10mol％;（2）对于厚度为0.2mm的成型产品，雾度为14％以下，全光线透射率为90％以上;（3）乙烯 - 芳香族乙烯基化合物共聚物，其特征在于，芳族乙烯基化合物含量与玻璃化转变温度（Tg）的关系为通过差示扫描量热计（DSC）在至少-50℃的温度下观察到的拐点法满足下式（1）：其中St表示共聚物中的芳族乙烯基化合物含量（摩尔分数％） ; 和（4）当芳族乙烯基化合物含量为5摩尔％至10摩尔％时，重均分子量为14万至500,000，当含量为0.5摩尔％至小于5摩尔％时，重均分子量为6万至500,000。

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