| 发明名称 |
EXTRUDABLE POLYVINYL ALCOHOL COMPOSITIONS |
| 摘要 |
A method for extruding polyvinyl alcohol which comprises adding sufficient energy to the polyvinyl alcohol to both melt it and essentially eliminate the crystallinity in the melt, and simultaneously removing energy from the melt at a rate sufficient to avoid decomposition of the polyvinyl alcohol. Rapidly cooling the extruded melt reduces the heat history and improves the resulting color of the extrudable polyvinyl alcohol.
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| 申请公布号 |
CA2024038(C) |
申请公布日期 |
1995.11.28 |
| 申请号 |
CA19902024038 |
申请日期 |
1990.08.27 |
| 申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
MARTEN, FINN LENNART;FAMILI, AMIR;NANGERONI, JAMES F. |
| 分类号 |
B29C47/00;B29B9/06;B29K29/00;C08F16/02;C08F16/06;C08J3/12;C08J3/20;C08K3/32;C08K5/05;C08K5/053;C08K5/06;C08L29/02;C08L29/04;(IPC1-7):C08F16/06;B29B9/02 |
主分类号 |
B29C47/00 |
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