发明名称 |
Use of phenothiazine derivatives to inhibit scale build up during polymerization of vinyl chloride |
摘要 |
Polyvinyl chloride reactor wall scale is reduced by conducting the polymerization in the presence of a phenothiazine dimer or higher oligomer made by reacting an aldehyde such as acetaldehyde or benzaldehyde with phenothiazine, or by reacting 2-acetylphenothiazine with formaldehyde.
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申请公布号 |
US5298578(A) |
申请公布日期 |
1994.03.29 |
申请号 |
US19890424415 |
申请日期 |
1989.10.20 |
申请人 |
OCCIDENTAL CHEMICAL CORPORATION |
发明人 |
DEWALD, RAYMOND C.;HONG, PAUL O. |
分类号 |
C07D279/20;C08F;C08F2/00;C08F2/02;C08F2/16;C08F2/18;C08F2/24;C08F2/44;C08F14/00;C08F14/06;C08K5/45;(IPC1-7):C08F2/16 |
主分类号 |
C07D279/20 |
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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