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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。