发明授权
US5084535A Preparation of pulverulent polymers of acrylic and/or methacrylic acid
and use thereof
失效
丙烯酸和/或甲基丙烯酸的聚合物的制备及其用途
- 专利标题： Preparation of pulverulent polymers of acrylic and/or methacrylic acid and use thereof
- 专利标题（中）： 丙烯酸和/或甲基丙烯酸的聚合物的制备及其用途
-
申请号： US438035申请日： 1989-11-20
-
公开(公告)号： US5084535A公开(公告)日： 1992-01-28
- 发明人: Karl Hennig , Heinrich Hartmann , Hans-Juergen Raubenheimer , Hermann Fischer , Walter Denzinger
- 申请人： Karl Hennig , Heinrich Hartmann , Hans-Juergen Raubenheimer , Hermann Fischer , Walter Denzinger
- 申请人地址： DEX Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DEX Ludwigshafen
- 优先权： DEX3842185 19881215
- 主分类号： B01F17/52
- IPC分类号： B01F17/52 ; C08F2/00 ; C08F2/04 ; C08F2/10 ; C08F2/38 ; C08F20/06 ; C08F28/00 ; C08F120/04 ; C08F228/02 ; C11D3/37 ; D21H19/36 ; D21H19/58
摘要：
Pulverulent polymers of acrylic acid and methacrylic acid are prepared by polymerizing (a) from 100 to 70% by weight of acrylic acid, methacrylic acid or a mixture thereof and (b) from 0 to 30% by weight of vinylsulfonic acid or an alkali metal salt thereof in a monohydric C.sub.1 -C.sub.8 -alcohol, water or a mixture thereof in a pulverulent bed in the presence of a polymerization initiator and from 0.05 to 10 mol % of thiocarboxylic acid and/or a mercaptoalcohol and from 0.05 to 10 mol % of propionic acid or formic acid as regulators, each percentage being based on the monomers used in the polymerization, by maintaining the pulverulent state during the polymerization, removing the heat of polymerization by distilling off the solvent and recirculating the reaction mixture.