发明名称 |
Method for preparing polymers by solid state polymerization |
摘要 |
Solid state polymerization of polycarbonates and polyesters is preceded by a step of contacting particles of an amorphous precursor polymer with a particulate material, typically a crystallized polycarbonate, which prevents adherence of the precursor polymer particles to each other. It is then possible to perform the solid state polymerization step without crystallizing the precursor polymer.
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申请公布号 |
US6187895(B1) |
申请公布日期 |
2001.02.13 |
申请号 |
US19990370435 |
申请日期 |
1999.08.09 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
VARADARAJAN GODAVARTHI SATYANA;DAY JAMES;IDAGE BHASKAR BHAIRAVNATH |
分类号 |
C08G63/80;C08G64/20;(IPC1-7):C08G64/00 |
主分类号 |
C08G63/80 |
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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