Acrylic-peg open time additive
AssigneeColumbia Insurance Company
InventorsGianna Pastena, Hrire Gharapetian, Navin Tilara
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Abstract
Disclosed herein is a polymeric paint additive that increases the open time and the flow and leveling of paint compositions, as well as, maintaining/improving paint film properties such as scrub resistance, water sensitivity, surfactant leaching and stain removal. The polymeric open time additive preferably has a high glass transition temperature, e.g., above 100° C., as determined by the well-known Fox's equation, and molecular weight of less than 20,000 Daltons (number average molecular weight). The particle size of the inventive polymeric open time additive is in the range of about 130 nm to about 230 nm (volume average), prior to being dissolved in a basic solution, such as an aqueous architectural composition.
Claims20
An aqueous latex architectural composition comprising
- an optional opacifying pigment,
- a film forming latex resin, and
- a non-film forming polymeric open time additive, wherein said additive has a number average MW from about 7,000 Daltons to about 20,000 Daltons, and a Tg from about 100° C. to about 200° C. and said additive comprises at least one hydrophilic monomer and at least one polymerizable glycol monomer,
- wherein the aqueous latex architectural composition is basic and said additive is dissolved in the aqueous latex architectural composition.
A copolymer open time emulsion latex comprising
- at least one hydrophilic monomer and at least one polymerizable glycol monomer,
- wherein the latex has a Mn from about 7,000 Daltons to about 20,000 Daltons, a Tg from about 100° C. to about 200° C. and a volume average particle size from about 130 nm to about 230 nm,
- wherein the latex is dissolvable in a basic aqueous solution.
Dependencies are inferred from the claim text.