发明名称 |
Syndiotactic polypropylene copolymer and extruded polypropylene articles |
摘要 |
A syndiotactic polypropylene copolymer is disclosed which comprises 70 to 99.9 mole % of propylene and 0.1 to 30 mole % of an olefin other than propylene; in the 13C-NMR spectrum of the syndiotactic polypropylene copolymer, a ratio of the intensity of a peak at about 20.2 ppm to the sum of the intensities of the total peaks attributable to methyl groups in propylene units at about 19-22 ppm being 0.3 or more. Also disclosed are extrusion-molded high-transparency articles, especially films and sheets and blown films, obtained by the extrusion of a polypropylene substantially having a syndiotactic structure.
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申请公布号 |
US6255425(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US19940182348 |
申请日期 |
1994.01.18 |
申请人 |
MITSUI CHEMICALS, INC. |
发明人 |
ASANUMA TADASHI;SHIOMURA TETSUNOSUKE;UCHIKAWA NOBUTAKA;SASAKI TATEYO;UCHIDA OSAMU;IWATANI TUTOMU;KIMURA SHIGERU;INOUE TAKEO |
分类号 |
C08F4/642;C08F210/06;C08J5/18;C08L23/10;(IPC1-7):C08F210/06 |
主分类号 |
C08F4/642 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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