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US 10,119,040 B2Granted
Paint composition
AssigneeRohm and Haas Company
InventorsGary W. Dombrowski, Pu Luo, Partha S. Majumdar
Life of this patent
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Abstract
The present invention relates to a deep base or accent coating composition comprising an acrylic based binder and a Zn++ additive. The composition of the present invention resists water staining better than comparable formulations that do not contain the additive.
Claims10
A paint composition comprising a stable aqueous dispersion of acrylic based polymer particles functionalized with from 0.2 to 12 weight percent, based on the weight of the polymer particles, of structural units of a monomer with keto functionality;
- a colorant at a concentration in the range of from 5 to 25 weight percent, based on the weight of the paint composition;
- from 0.5 to 5 weight percent of a Zn++ compound, based on the weight of the paint composition;
- and from 0.5 to 10 weight percent of a dihydrazide or a polyamine, based on the weight of the paint composition;
- and a substantial absence of extenders;
- wherein the polymer particles are two-phase polymer particles with a soft phase having a Tg of not more than 0° C., and a hard phase having a Tg of not less than 30° C.;
- wherein the ratio of the soft phase to the hard phase is in the range of from 90:10 to 60:40;
- with the proviso that the polymer particles have an overall Tg of less than 15° C.
4 more elements
Dependencies are inferred from the claim text.