发明名称 |
High vinylidene chloride content interpolymer coating resins and method of preparation. |
摘要 |
A process for preparing in aqueous emuision an interpolymer composition have polymerized therein 86 to 92 mole percent vinylidene chloride, 14 to 8 mole percent of a comonomer mixture of methyl methacrylate and a comonomer selected from the group consisting of acrylonitrile, methacrylic acid and methacrylonitrile in a ratio of the comonomer to methyl methacrylate of from 0.5 : 1 to 2 : 1, and 0.5 to 1.0 weight percent itaconic acid, based on weight of vinylidene chloride plus comonomer mixture. The interpolymers are prepared in a three step process wherein the monomer feeding is step-wise reduced for a portion of Step III and a polymerization initiator is added at the same constant rate as in Steps I an II. The process reduces the amount of unreacted mixed monomers remaining after monomer addition is completed and the detrimental results of a large variation in polymer composition particularly from high vinylidene chloride fractions.
|
申请公布号 |
EP0068461(A1) |
申请公布日期 |
1983.01.05 |
申请号 |
EP19820105638 |
申请日期 |
1982.06.25 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
GIBBS, DALE SABIN;TREPTOW, WARREN LEE |
分类号 |
C08F214/00;C08F2/22;C08F14/00;C08F214/08;C09D127/04;C09D127/08;(IPC1-7):C08F214/08 |
主分类号 |
C08F214/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|