发明名称 |
Polycarbodiimide copolymer and process for production thereof |
摘要 |
<p>There are provided a polycarbodiimide copolymer having a main structure represented by the following formula (1): <CHEM> wherein R1 is an isocyanate residue; R2 is a polyfunctional liquid rubber residue; X is a urethane bond, an amide bond or a urea bond; p is an integer of 5 to 50; q is an integer of 1 to 5; and r is 0 or 1; and a process for producing the above polycarbodiimide copolymer, which comprises reacting a polyfunctional liquid rubber with an organic diisocyanate in excess of the rubber and then subjecting the diisocyanate components in the reaction system to carbodiimization using a carbodiimidization catalyst. The polycarbodiimide copolymer alleviates the problems of the prior art, has the excellent heat resistance inherently possessed by polycarbodiimide resins, is improved, as compared with conventional polycarbodiimide resins, in thermoformability under heating and pressure when made into a solid such as powder or granule, and causes no blistering under heating.</p> |
申请公布号 |
EP0943642(A1) |
申请公布日期 |
1999.09.22 |
申请号 |
EP19990104968 |
申请日期 |
1999.03.12 |
申请人 |
NISSHINBO INDUSTRIES, INC. |
发明人 |
AMANO, SATOSHI;NAKAMURA, NORIMASA |
分类号 |
C08G18/09;C08G18/32;C08G18/69;C08G73/00;(IPC1-7):C08G73/00;C08G18/79;C08G18/02 |
主分类号 |
C08G18/09 |
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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