C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 220/02 (2006.01) C08F 2/16 (2006.01) C08F 22/02 (2006.01) C11D 3/37 (2006.01)
Patent
CA 2139817
The present invention provides an efficient aqueous polymerization process of 6 hours or less for preparing water soluble polymer products formed from 50 to 100 weight percent of one or more monoethylenically unsaturated dicarboxylic acid monomers and 0 to 50 weight percent of one or more optional other water soluble monoethylenically unsaturated monomers. In this process, 1) an aqueous reaction mixture of dicarboxylic acid monomer is formed, 2) from about 0.9 to about 2.1 equivalent moles of base are added to the reaction mixture per mole dicarboxylic acid monomer, 3) at least one metal promoter is added to the reaction mixture, 4) one or more initiators and optional other water soluble monoethylenically unsaturated monomer are fed to the reaction mixture, 5) the weight percent reaction solids during the polymerization is between about 40 and about 65 weight percent, and 6) the reaction temperature is maintained at about 80 °C to about 140°C. The polymer product produced by the process of the present invention is useful as an additive in detergents, cleaning formulations, and water circulating systems.
Fiarman Irwin S.
Mccallum Thomas F. III
Weinstein Barry
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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