C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/4217, 400/54
C09D 157/04 (2006.01)
Patent
CA 1127785
ABSTRACT Methods are disclosed for the production of a water dispersible solution of acidic copolymer in water soluble polyol with controlled limited reaction between the copolymer and the polyol. This method comprises copolymerizing monoethylenically unsaturated monomers including a proportion of carboxyl-functional monomer providing dispersibility in water with the aid of a base and from 0.5% - 5%, based on the total weight of mono- mers, of a monoethylenically unsaturated monomer carry- ing a reactive group selected from dicarboxylic acid anhydride functionality and N-methylol functionality, the copolymerization being carried out in solution in a water soluble polyol. This copolymerization is preceded by or carried out under conditions causing substantially complete reaction between the anhydride or the N-methylol functionality in the reactive monomer, and the hydroxy groups in the polyol. Aqueous coating compositions are provided by dispersing the copolymer solution in water with the aid of a volatile base.
320882
Sekmakas Kazys
Shah Raj
Desoto Inc.
Fetherstonhaugh & Co.
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