发明名称 |
Process for preparing polymer polyols |
摘要 |
The invention relates to a process for the batch or semi-batch preparation of a polymer polyol, which process involves (1) preparing a seed by polymerizing in a base polyol at least one ethylenically unsaturated monomer in the presence of a polymerization initiator and macromer, and in the presence of from 0.5 to 50 % wt of polymer polyol heel, based on amount of polymer present in heel compared with total amount of polymer present, (2) adding additional ethylenically unsaturated monomer to the seed obtained in step (1) and optionally additional polyol, and polymerizing the mixture obtained in step (2).
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申请公布号 |
US2003220410(A1) |
申请公布日期 |
2003.11.27 |
申请号 |
US20030437665 |
申请日期 |
2003.05.14 |
申请人 |
HEINIS BOB;KARZIJN WILLEM;KRIJGER MARTIEN;LELIEVELD MARTINUS JOHANNES MARIA |
发明人 |
HEINIS BOB;KARZIJN WILLEM;KRIJGER MARTIEN;LELIEVELD MARTINUS JOHANNES MARIA |
分类号 |
C08F290/06;C08F2/00;C08G18/63;C08G101/00;(IPC1-7):C08G18/00;C08L1/00 |
主分类号 |
C08F290/06 |
代理机构 |
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主权项 |
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地址 |
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