发明名称 |
PROCESS FOR PRODUCING VINYL CHLORIDE RESIN |
摘要 |
A process for producing a vinyl chloride polymer by polymerizing a monomer comprising vinyl chloride by suspension polymerization in a polymerization vessel on the inner wall surface of which a coating of a polymer scale preventive agent is formed, comprising the steps of applying a high-speed shearing force to a mixture comprising water, the monomer, a polymerization initiator, and (A) a dispersant comprising a partially saponified polyvinyl alcohol having a specified average degree of polymerization and a specified degree of saponification plus (B) a dispersant comprising a hydroxypropylmethylcellulose which has a specified methoxyl substitution degree, a specified hydroxypropoxyl substitution degree, and a specified viscosity and subjecting the mixture to said suspension polymerization. A vinyl chloride polymer having an average particle diameter of 200 to 600 .mu.m and a narrow particle size distribution and excellent in plasticizer take-up, etc. is provided.
|
申请公布号 |
CA2043041(A1) |
申请公布日期 |
1991.11.23 |
申请号 |
CA19912043041 |
申请日期 |
1991.05.22 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
KANEKO, ICHIRO;FUJIWARA, MAKOTO;FUJIMOTO, TATSUYA |
分类号 |
C08F14/06;C08F2/00;C08F2/18;C08F2/20;C08F114/06;(IPC1-7):C08F2/20 |
主分类号 |
C08F14/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|