发明名称 |
Method for molding syndiotactic polypropylene and molded article. |
摘要 |
<p>A method for molding a polypropylene or a propylene copolymer having a syndiotactic structure which comprises the steps of melting, molding, if desired, quenching and then stretching a propylene homopolymer or a copolymer of propylene and a small amount of ethylene or another alpha -olefin which has a substantially syndiotactic structure, or a mixture of the same and a small amount of a polypropylene having a substantially isotactic structure. The molded and stretched article can be heated at a temperature of a molding temperature or more, while a load is applied to the article. Furthermore, the molded and stretched article, if desired, can be treated with a hydrocarbon vapor, while a load is applied to the article. The molded article obtained by the method of the present invention has a novel crystalline structure.</p> |
申请公布号 |
EP0451743(A2) |
申请公布日期 |
1991.10.16 |
申请号 |
EP19910105489 |
申请日期 |
1991.04.07 |
申请人 |
MITSUI TOATSU CHEMICALS INC. |
发明人 |
ASANUMA, TADASHI;SASAKI, TATEYO;ITO, MITSURU;KIMURA, SHIGERU;INOUE, TAKEO |
分类号 |
C08J5/18;C08J7/02;C08L23/10;D01F6/06 |
主分类号 |
C08J5/18 |
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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