发明名称 |
Compositions of polycondensed branched polyester polymers and aromatic polycarbonates, and the closed cell polymer foams made therefrom |
摘要 |
A foamable polyester composition comprising a combination of blowing agent and mixed polymer composition comprising: a) a semi-crystalline polyester composition comprising a polycondensed branched polyester polymer, and b) an aromatic polycarbonate polymer. The foamable composition has a high extrusion melt strength, and can pulled across a die without ripping, to form a continuous thermoformable closed cell polyester sheet. The foamed sheets have a uniform, fine, and closed cell morphology; and simultaneously are less dense but have a higher impact strength than comparable closed cell polymers made in only with linear polyesters as the polyester component or without the aromatic polycarbonate.
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申请公布号 |
US6080824(A) |
申请公布日期 |
2000.06.27 |
申请号 |
US19990360764 |
申请日期 |
1999.07.26 |
申请人 |
SHELL OIL COMPANY |
发明人 |
TUNG, DEBORAH ANN SNELL;ROLLICK, KEVIN;SCOARSTE, JOHN MICHAEL;JOHNSTON, WALTER FRANCIS |
分类号 |
C08J9/04;C08J9/00;C08L67/00;(IPC1-7):C08F20/00 |
主分类号 |
C08J9/04 |
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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