发明授权
- 专利标题: Dispersant polymers
- 专利标题(中): 分散剂聚合物
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申请号: US455447申请日: 1995-05-31
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公开(公告)号: US5554682A公开(公告)日: 1996-09-10
- 发明人: Rodney M. Harris , Maqsood S. Ahmed , Thomas A. Renner
- 申请人: Rodney M. Harris , Maqsood S. Ahmed , Thomas A. Renner
- 申请人地址: OH Cleveland
- 专利权人: The Sherwin-Williams Company
- 当前专利权人: The Sherwin-Williams Company
- 当前专利权人地址: OH Cleveland
- 主分类号: C08F220/12
- IPC分类号: C08F220/12 ; C09D7/02 ; C08L33/00 ; C08K5/10
摘要:
A hydroxy-functional polymeric dispersant which is substantially free of acid groups, amine groups, and ethylenic unsaturation, the dispersant being especially adapted for dispersing pigments therein and being compatible with a variety of film-forming polymers, said dispersant being the free radical addition polymerization reaction product of a mixture of monomers consisting essentially of:(a) 15-30% by weight styrene; and(b) 15-30% by weight of at least one alkyl methacrylate monomer having 1 to 16 carbon atoms in the alkyl group; and(c) 20-60% by weight of at least one alkyl acrylate monomer having 1 to 16 carbon atoms in the alkyl group; and(d) 7-25% by weight of at least one hydroxy-functional ethylenically unsaturated monomer copolymerizable with monomers (a) (b) and (c);wherein said polymeric dispersant has a weight average molecular weight of 18,000 to 24,000, a number average molecular weight of 4,500 to 7,400, and a polydispersity of 2.9 to 4.2.
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