发明名称 |
PROCESS FOR PRODUCTION OF VINYL CHLORIDE POLYMER |
摘要 |
<p>Process for production of vinyl chloride polymer This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated .pi. bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.</p> |
申请公布号 |
CA1249099(A) |
申请公布日期 |
1989.01.17 |
申请号 |
CA19850486934 |
申请日期 |
1985.07.17 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
KOYANAGI, SHUNICHI;KITAMURA, HAJIME;SHIMIZU, TOSHIHIDE;KANEKO, ICHIRO |
分类号 |
C08F14/06;C08F2/00;C08F2/18;C08F4/06;(IPC1-7):C08F14/06 |
主分类号 |
C08F14/06 |
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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