Water-based paint compositions
AssigneeKansai Paint Co., Ltd.
InventorYoshiyuki Yukawa
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Abstract
This invention provides water-based paint compositions which can form coating film excelling in finished appearance such as coated surface smoothness and also of excellent performance in such properties as water resistance, which comprise water-dispersible acrylic polymer particles (A), reactive group-containing resin (B) and optionally curing agent (C), the water-dispersible acrylic polymer particles (A) having a weight-average molecular weight of at least 1,100,000 and an absorbance not higher than 0.2 at the wavelength of 330 nm as measured with spectrophotometer in the state of a liquid dispersion at a mass concentration of 1.35% in 1,4-dioxane solvent.
Claims14
A water-based paint composition consisting essentially of water-dispersible acrylic polymer particles (A), a reactive group-containing acrylic resin (B) and optionally a curing agent (C),
- wherein the water-dispersible acrylic polymer particles (A) have a weight-average molecular weight of at least 1,100,000 and an absorbance in a liquid dispersion at a mass concentration of 1.35% in 1,4-dioxane solvent of not higher than 0.2 at a wavelength of 330 nm as measured with a spectrophotometer, and
- the water-dispersible acrylic polymer particles (A) are obtained by emulsion polymerization of polymerizable unsaturated monomers with an azo compound as a radical polymerization initiator, and
- wherein the reactive group-containing acrylic resin (B) has a weight-average molecular weight of 1,000-200,000.
Dependencies are inferred from the claim text.