Latex based open-time extenders for low VOC paints
AssigneeColumbia Insurance Company
InventorsMichael Bochnik, Yakov Freidzon, Robert Sheerin, Ning Wu
Life of this patent
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Abstract
The present invention relates to paint extenders or open-time extenders, which are mixed with an architectural coating, such as aqueous latex paints, to increase the coating's open time. The open-time extender comprises acrylic or vinyl latex particles having a mean diameter of less than about 150 nm, and at least one crosslinkable monomer that can crosslink the latex particles in the open-time extender to the latex particles in the architectural coating at ambient conditions. The open-time extender also comprises water and the total solid content of the open-time extender is less than about 15% by weight.
Claims15
An open-time extender adapted to be admixed to an architectural coating composition to extend the open time of said architectural coating composition,
- said open-time extender comprising latex particles having a mean diameter of less than about 150 nm, at least one crosslinkable monomer or oxidatively crosslinkable monomer that can crosslink at ambient conditions, and
- water,
- wherein the total solid content of the open-time extender is less than about 15% by weight.
Dependencies are inferred from the claim text.