Post-extended anionic acrylic dispersion
AssigneeBASF SE
InventorsAnna M. Budde, Timothy D. Salatin
Life of this patent
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Abstract
The present invention is directed to an aqueous anionic acrylic dispersion produced by a) dispersing an acrylic resin, having functional groups selected from the group consisting of carboxylic acid groups, carboxylic anhydride groups or mixtures thereof in water in the presence of a tertiary amine and b) reacting the carboxylic acid groups on the acrylic resin with an organic compound having at least two oxirane groups, a basecoat and a rheology control agent comprising said aqueous anionic acrylic dispersion, a method of coating a substrate with said dispersion and the coated substrate.
Claims13
A process for producing a basecoat, comprising the steps of:
- a) dispersing an acrylic resin having functional groups consisting of carboxylic acid groups, anhydride groups, and mixtures thereof in water in the presence of a tertiary amine to form a dispersion of an acrylic resin having carboxylic acid groups;
- b) subsequently reacting the carboxylic acid groups on the acrylic resin with an organic compound with at least two oxirane groups to from about 30% to about 100% of the theoretical completion to form an aqueous anionic acrylic dispersion;
- and
- c) adding a crosslinker selected from the group consisting of acrylics, polyesters, alkyds, epoxy resins, aminoplast resins, blocked polyisocyanates, and mixtures thereof.
Dependencies are inferred from the claim text.