Patent ID: 6153690
Filing Date: 2000-11-28
Classification: C08G

Abstract:
A method of producing a one-pack shelf stable waterborne isocyanate-modified acrylic polymer consisting essentially of:reacting a compound terminated with at least two isocyanate-functional groups with an isocyanate-reactive acrylic polymer in an aqueous medium to produce said one-pack shelf stable waterborne isocyanate-modified acrylic polymer,wherein said isocyanate-reactive acrylic polymer consists essentially of a copolymer polymerized from a monomer mixture which consists essentially of:(a) at least one monoethylenically unsaturated monomer selected from the group consisting of (meth)acrylic acid monomers, alkyl (meth)acrylate monomers, vinyl monomers and mixtures thereof;(b) at least one isocyanate-reactive monomer selected from the group consisting of acetyl acetoxyethyl (meth)acrylate, N-cyanoacetyl-N-methylaminoethyl (meth)acrylate, hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, isomers of hydroxy butyl (meth)acrylate and mixtures thereof.