发明名称 |
Grafting of ethylenically unsaturated monomers onto polymers |
摘要 |
The present invention relates to a process for the preparation of grafted polymers wherein in a first step A) a stable nitroxyl radical is grafted onto a polymer, which step comprises heating a polymer and a stable nitroxyl radical (NO.); and in a second step B) the grafted polymer of step A) is heated in the presence of an ethylenically unsaturated monomer or oligomer to a temperature at which cleavage of the nitroxyl-polymer bond occurs and polymerization of the ethylenically unsaturated monomer or oligomer is initiated at the polymer radical; maintaining said temperature for further polymerization and afterwards cooling down the mixture to a temperature below 60° C. Further subjects are grafted polymers prepared by said process, the use of the polymeric radical initiator and the use of NO radicals for grafting polymers.
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申请公布号 |
US6525151(B1) |
申请公布日期 |
2003.02.25 |
申请号 |
US20010786186 |
申请日期 |
2001.03.01 |
申请人 |
CIBA SPECIALTY CHEMICALS CORPORATION |
发明人 |
ROTH MICHAEL;PFAENDNER RUDOLF |
分类号 |
C08F4/04;C08F2/38;C08F4/00;C08F4/32;C08F255/00;C08F291/00;C08F293/00;(IPC1-7):C08F4/00 |
主分类号 |
C08F4/04 |
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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