发明名称 |
Processes for the preparation of a monodisperse polymers, processes for the continuous polymerization of cyclic monomers, and polymers prepared thereby |
摘要 |
The present invention relates to a method for preparing lactone polymers, carbonate polymers, lactone-carbonate block copolymers and lactone-arbonate random copolymers via a ring-opening addition reaction of a lactone monomer, a cyclic carbonate monomer or a mixture thereof using an initiator and in the presence of a specific titanium-type Lewis acid catalyst. The resulting polymers have a molecular weight distribution (Mw/Mn) approximately equal to 1 or a extremely high purity of single-structure components. The polymer molecules range in an oligomer region to a molecular weight of approximately 200,000. The present invention also relates to a method for preparing lactone polymers, carbonate polymers and lactone-carbonate copolymers having a narrow molecular weight distribution and which can be obtained via a continuous polymerisation of a lactone monomer and/or a cyclic carbonate monomer using an initiator in an extruder in the presence of a specific titanium-type Lewis acid catalyst or an aluminium-type Lewis acid catalyst. The present invention also relates to these resulting polymers.
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申请公布号 |
US6191250(B1) |
申请公布日期 |
2001.02.20 |
申请号 |
US19990331022 |
申请日期 |
1999.06.15 |
申请人 |
DAICEL CHEMICAL INDUSTRIES, LTD. |
发明人 |
AIDA TAKUZO;WATANABE JUN |
分类号 |
C08G63/08;C08G63/64;C08G63/82;C08G64/30;(IPC1-7):C08G64/00 |
主分类号 |
C08G63/08 |
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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