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    Ethylene-aromatic vinyl compound copolymer and method for its production
    8.
    发明授权
    Ethylene-aromatic vinyl compound copolymer and method for its production 失效
    乙烯 - 芳族乙烯基化合物共聚物及其制备方法

    公开(公告)号：US5883213A

    公开(公告)日：1999-03-16

    申请号：US820082

    申请日：1997-03-19

    申请人： Toru Arai ,  Akihiko Nakamura ,  Shigeru Suzuki ,  Toshiaki Otsu ,  Akio Okamoto

    发明人： Toru Arai ,  Akihiko Nakamura ,  Shigeru Suzuki ,  Toshiaki Otsu ,  Akio Okamoto

    IPC分类号： C08F4/64 ,  C08F4/642 ,  C08F4/659 ,  C08F4/6592 ,  C08F210/02 ,  C08F212/04 ,  C08L25/08 ,  C08F212/08

    CPC分类号： C08F210/02 ,  C08F4/65912 ,  C08F4/65927 ,  Y10S526/943

    摘要： An ethylene-styrene copolymer having a weight average molecular weight of at least 81,000, having a styrene content of from 1 to less than 55% by molar fraction, wherein the stereoregularity of phenyl groups int he alternating structure of ethylene and styrene represented by the following formula (1) contained in its structure, is represented by an isotactic diad index m of more than 0.75, and the alternating structure index .lambda. represented by the following formula (i) is smaller than 70 and larger than 1:.lambda.=A3/A2.times.100 (i)where A3 is the sum of areas of three peaks a, b and c attributable to an ethylene-styrene alternating structure represented by the following formula (1'), obtained by 13C-NMR, and A2 is the sum of areas of peaks attributable to the main chain methylene and methine carbon, as observed within a range of from 0 to 50 ppm by 13C-NMR using TMS as standard, ##STR1## where Ph is a phenyl group, and xa is an integer of at least 2 representing the number of repeating units.

    摘要翻译： 重均分子量为81,000以上的乙烯 - 苯乙烯共聚物，其苯乙烯含量为摩尔分数为1至小于55％，其中苯基的立构规整性为乙烯和苯乙烯的交替结构，由以下 其结构中所含的式（1）由大于0.75的全同立构二元指数m表示，由下式（i）表示的交替结构指数λ小于70并且大于1：λ= A3 / A2×100 （i）其中A3是由13 C-NMR获得的归属于由下式（1'）表示的乙烯 - 苯乙烯交替结构的三个峰a，b和c的面积之和，A2是 归属于主链亚甲基和次甲基碳的峰，通过使用TMS作为标准的13 C-NMR在0〜50ppm的范围内观察到，其中Ph是苯基，xa是 至少2代表重复次数 g单位。

    Ethylene/aromatic vinyl copolymer and molded product thereof
    9.
    发明授权
    Ethylene/aromatic vinyl copolymer and molded product thereof 有权
    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。