发明名称 |
Polycarbodiimide modification of polyesters for extrusion applications |
摘要 |
There is disclosed a process for preparing polycarbodiimide modified thermoplastic polyesters having unique rheological properties which include increased intrinsic viscosity and melt strength. These polycarbodiimide modified thermoplastic polyesters are prepared by reacting the carboxyl end groups of thermoplastic saturated polyesters which are in a molten state with the polycarbodiimide groups of at least one polycarbodiimide such as poly (4,4'-diphenyl-methane carbodiimide) which both (a) is derived from at least one aromatic diisocyanate which is either unsubstituted or contains up to one methyl substituent on each aromatic ring, and (b) contains at least three carbodiimide units per polycarbodiimide molecule.
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申请公布号 |
US4071503(A) |
申请公布日期 |
1978.01.31 |
申请号 |
US19760715946 |
申请日期 |
1976.08.19 |
申请人 |
CELANESE CORPORATION |
发明人 |
THOMAS, NORMAN W.;BERARDINELLI, FRANK M.;EDELMAN, ROBERT |
分类号 |
C08G63/00;B29B7/00;B29C47/00;B29C47/88;B29C47/92;C08G63/682;C08G73/00;C08G73/16;C08L67/02;(IPC1-7):C08G63/46;B29C5/06 |
主分类号 |
C08G63/00 |
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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