Coating composition imparting improved stain resistance
AssigneePPG Industries Ohio, Inc.
InventorsYu Wang, Steven E. Surma, Xiangling Xu
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Abstract
A coating composition includes: an aqueous dispersion of self-crosslinkable core-shell particles, where the corm-shell particles include (1) a polymeric core at least partially encapsulated by (2) a polymeric shell having urethane linkages, keto and/or aldo functional groups, and hydrazide functional groups, where the polymeric core is covalently bonded to at least a portion of the polymeric shell, and a hydrophobic additive including a wax and/or a silicon-containing compound, where the hydrophobic additive is non-reactive with the polymeric core and the polymeric shell. A substrate coated with a coating formed from the coating composition and a method for improving stain resistance of a substrate are also disclosed.
Claims19
A coating composition comprising:
- an aqueous dispersion of self-crosslinkable core-shell particles, wherein the core-shell particles comprise (1) a polymeric core at least partially encapsulated by (2) a polymeric shell comprising urethane linkages, keto and/or aldo functional groups, and hydrazide functional groups, wherein the polymeric core is covalently bonded to at least a portion of the polymeric shell,
- a hydrophobic additive comprising a wax and/or a silicon-containing compound, wherein the hydrophobic additive is non-reactive with the polymeric core and the polymeric shell, and
- an acrylic polymer prepared from ethylenically unsaturated monomers.
Dependencies are inferred from the claim text.