发明名称 |
Method of making polycarbonate prepolymer and method of making high molecular weight polycarbonate |
摘要 |
Polycarbonate prepolymer is crystallized using a water and solvent mixture, or by application of a shear force while heating, or by orientation of the prepolymer with a shear force followed by a temperature hold. High molecular weight polycarbonate is obtained by the solid state reaction of the crystallized prepolymer.
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申请公布号 |
US5864006(A) |
申请公布日期 |
1999.01.26 |
申请号 |
US19970823949 |
申请日期 |
1997.04.08 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
ORMAND, MICHAEL G.;MUNJAL, SARAT |
分类号 |
C08G64/20;C08G64/30;C08G64/40;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/20 |
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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