发明名称 |
Process for preparing polyesters |
摘要 |
Disclosed is a process for improving the rate of solid state polymerization of ethylene terephthalate polymers or copolymers comprising copolymerizing terephthalic acid or dimethyl terephthalate and ethylene glycol with 2-10 mol % diethylene glycol and 0.1-10 mol % cyclohexanedimethanol to form a prepolymer, forming solid particles from the prepolymer, and solid state polymerizing the particles at a temperature between the glass transition temperature and melting point of the particles until a predetermined I.V. is reached. |
申请公布号 |
ZA9602456(B) |
申请公布日期 |
1996.10.02 |
申请号 |
ZA19960002456 |
申请日期 |
1996.03.27 |
申请人 |
EASTMAN CHEMICAL COMPANY |
发明人 |
RANDY STEVEN BEAVERS;KAREN LYNN CARMAN;MICHAEL LYNN CASSELL;JOSEPH FRANKLIN KNIGHT;MARC ALAN STRAND;SARA STANLEY WELLS |
分类号 |
C08G63/199;C08G63/672;C08G63/80 |
主分类号 |
C08G63/199 |
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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