Water-based coating compositions containing epoxy resin(s) and (meth)acrylate(s), and methods of using the same
AssigneeCognis Deutschland GmbH & Co. KG
InventorsRainer Hoefer, Ulrich Nagorny
Life of this patent
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Abstract
Water-based coating composition comprising: (a) from 0.5 to 90% by weight of at least one epoxy resin, wherein the epoxy resin is solid at 20° C., and wherein the epoxy resin is self-dispersing in water; (b) from 0.5 to 90% by weight of at least one (meth)acrylate of a polyol; and (c) from 5.0 to 99.0% by weight of water; wherein the at least one (meth)acrylate comprises at least two (meth)acrylate groups per molecule, and wherein the Brookfield viscosity of the composition is less than 15000 mPas.
Claims16
A water-based coating composition comprising:
- (a) from 0.5 to 90% by weight of at least one epoxy resin, wherein the epoxy resin is solid at 20° C., and wherein the epoxy resin is self-dispersing in water;
- (b) from 0.5 to 90% by weight of at least one (meth)acrylate of a polyol;
- and (c) from 5.0 to 99.0% by weight of water;
- wherein the at least one (meth)acrylate comprises at least two (meth)acrylate groups per molecule, and wherein the Brookfield viscosity of the composition is less than 15000 mPas.
A method for preparing a cured coating composition, said method comprising:
- (a) providing a coating composition comprising:
- (a) from 0.5 to 90% by weight of at least one epoxy resin, wherein the epoxy resin is solid at 20° C., and wherein the epoxy resin is self-dispersing in water;
- (b) from 0.5 to 90% by weight of at least one (meth)acrylate of a polyol;
- and (c) from 5.0 to 99.0% by weight of water;
- wherein the at least one (meth)acrylate comprises at least two (meth)acrylate groups per molecule, and wherein the Brookfield viscosity of the composition is less than 15000 mPas;
- (b) contacting the composition with from 1 to 200% by weight, based on the at least one epoxy resin, of a water-dilutable hardener;
- and
- (c) allowing the composition and hardener to cure.
Dependencies are inferred from the claim text.