发明名称 |
MOLDED ARTICLES OF SYNDIOTACTIC POLYPROPYLENE AND METHOD FOR PREPARING SAME |
摘要 |
A molded article of a syndiotactic polypropylene having excellent transparency in which a melting point attributed to the polypropylene having the syndiotactic structure measured at a heating rate of 10 DEG C/minute by differential scanning thermal analysis is represented by a substantially single peak, the aforesaid molded article being prepared by heating, melting and then hot-molding a homopolymer of propylene or a copolymer of propylene and a small amount of another olefin, which have a substantially syndiotactic structure, or a mixture of the homopolymer or the copolymer and a small amount of a polypropylene having a substantially isotactic structure, followed by quenching, or, after these steps, additionally subjecting the above molded article to a heat treatment at a temperature of less than its melting point. A method for preparing the above molded article is also disclosed here. |
申请公布号 |
CA2030245(A1) |
申请公布日期 |
1991.05.21 |
申请号 |
CA19902030245 |
申请日期 |
1990.11.19 |
申请人 |
MITSUI TOATSU CHEMICALS, INCORPORATED |
发明人 |
ASANUMA, TADASHI;SASAKI, TATEYO;ITO, MITSURU;SHIOMURA, TETSUNOSUKE |
分类号 |
C08J5/00;B29C35/00;B29C67/24;B29C71/02;B29K23/00;B29K105/32;C08F4/642;C08F110/06 |
主分类号 |
C08J5/00 |
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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