发明名称 |
Process for production of polycarbodiimide resin powder |
摘要 |
A process for producing a polycarbodiimide resin powder, which includes reacting an organic diisocyanate in the presence of a carbodiimidization catalyst in a solvent to produce a polycarbodiimide resin and obtaining the resin in a powder form, where the organic diisocyanate is represented by the following formula <IMAGE> or <IMAGE> where R1 is a lower alkyl group or a lower alkoxyl group, or <IMAGE> where R2 and R3 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group, and X is an oxygen atom or a methylene group, or <IMAGE> where R4 and R5 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group; the solvent is a mixed solvent of a good solvent to polycarbodiimide resin and a poor solvent to the resin, having a precipitation number of 30-80; and when the reaction has reached a certain stage, the reaction system is cooled to make the system a slurry of a polycarbodiimide, and then the polycarbodiimide is obtained in a powder form.
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申请公布号 |
US5650476(A) |
申请公布日期 |
1997.07.22 |
申请号 |
US19950541157 |
申请日期 |
1995.10.11 |
申请人 |
NISSHINBO INDUSTRIES, INC. |
发明人 |
AMANO, SATOSHI;NAKAMURA, TOMOKI;ITO, TAKAHIKO;TOMITA, HIDESHI;NAKAMURA, NORIMASA |
分类号 |
C08G18/02;(IPC1-7):C08G18/02 |
主分类号 |
C08G18/02 |
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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