发明名称 |
Process for the manufacture of polycarbonate-oligomers without solvent |
摘要 |
Polycarbonate oligomers having hydroxy end groups are produced by a melt reaction with bisphenol-A and a basic catalyst. The oligomers may then be reacted with chloro end-group siloxanes in the presence of a solvent and an acid acceptor to yield polycarbonate-polysiloxane block co-polymers. The melt reaction occurs at elevated temperature without the direct use of phosgene gas.
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申请公布号 |
US5344908(A) |
申请公布日期 |
1994.09.06 |
申请号 |
US19930058070 |
申请日期 |
1993.05.04 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
ROSENQUIST, NILES R. |
分类号 |
C08G64/00;C08G64/18;C08G64/42;C08G77/42;C08G77/448;C08G81/00;(IPC1-7):C08G77/04 |
主分类号 |
C08G64/00 |
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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