PROCESS FOR PREPARING POLYMERS,申请号ZA19730000182-传众专利搜索

PROCESS FOR PREPARING POLYMERS

申请公布号：ZA7300182(B)

申请号：ZA19730000182

申请日期：1973.01.10

申请公布日期：1973.12.19

申请人：

RHONE PROGIL

发明人：DEBORD D;SOUSSAN S

分类号：C08F214/00;C08F2/00;C08F2/02;C08F2/44;C08F14/00;C08F14/06;C08F214/06;C08F220/00;C08F220/04

主分类号：C08F214/00

摘要：1408958 Polymerization of vinyl chloride RHONE PROGIL 10 Jan 1973 [11 Jan 1972] 1274/73 Heading C3P In the two-stage bulk polymerization of vinyl chloride the first stage is effected with high turbulence to 5-15% conversion in the presence of 0À05-2% by wt. of acrylic or methacrylic acid or an alkyl, alkenyl, cycloalkyl or substituted alkyl mono-ester thereof or an ethylene glycol, polyethylene glycol, propylene glycol or polypropylene glycol dimethacrylate and the second stage is effected with low agitation. There may also be added to the second stage further monomer and/or a prepolymerizate obtained in the absence of the acrylic modifier. In examples are formed homopolymers or copolymers with vinyl acetate and/or propylene in the presence of tri- or tetraethylene glycol, ethylene glycol, propylene glycol or tripropylene glycol, dimethacrylate acrylic acid, methyl methacrylate, methyl, ethyl or 2-ethylhexyl acrylate, glycidyl methacrylate or allyl acrylate.