发明授权
US4763715A Process for preparing polycarbonate terpolymer foam suitable for lost
foam casting
失效
制备适合于失去泡沫塑料的聚碳酸酯三元共聚物泡沫的方法
- 专利标题： Process for preparing polycarbonate terpolymer foam suitable for lost foam casting
- 专利标题（中）： 制备适合于失去泡沫塑料的聚碳酸酯三元共聚物泡沫的方法
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申请号： US132098申请日： 1987-12-14
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公开(公告)号： US4763715A公开(公告)日： 1988-08-16
- 发明人: Michael J. Cannarsa , Haven S. Kesling, Jr. , Hsiang-Ning Sun
- 申请人： Michael J. Cannarsa , Haven S. Kesling, Jr. , Hsiang-Ning Sun
- 申请人地址： PA Newtown Square
- 专利权人： Arco Chemical Company
- 当前专利权人： Arco Chemical Company
- 当前专利权人地址： PA Newtown Square
- 主分类号： B22C1/22
- IPC分类号： B22C1/22 ; B22C7/02 ; C08G64/02 ; C08J9/18
摘要：
The evaporative casting of molten metals has been shown to produce castings having smooth surfaces without any sign of carbon deposits thereon by using a terpolymer polycarbonate prepared from cyclopentene oxide or cyclohexene oxide, ethylene oxide, propylene oxide, or butylene oxide, and carbon dioxide in making patterns for the lost foam casting process.
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