Behr Process Corporation

Christopher Ziehm

Jigui Li

Ryan Hicken

Ming-Ren Tarng

A method for forming an emulsion polymer includes a step of forming a pre-emulsion by combining a monomer composition with a siloxane-containing composition in water and polymerizing the pre-emulsion by combining the pre-emulsion with a radical initiator in a reactor to form a reaction mixture. Characteristically, the monomer composition includes one or more monomers selected from the group consisting of (meth)acrylic acid monomers, (meth)acrylic monomers, styrene monomers, vinyl acetate monomers, vinyl ester monomers, and combinations thereof. A paint composition that includes the emulsion polymer is also provided. This invention describes a method to provide excellent burnish and mar resistance while avoiding problems with film appearance that can result from siloxane addition.

Burnish and mar resistant resin for clear and pigmented coatings

A method for forming a benzophenone-containing emulsion is provided. The method includes a step of forming a pre-emulsion by combining a monomer composition with a benzophenone or a benzophenone derivative in water, the monomer composition including one or more monomers selected from the group consisting of (meth)acrylic acid monomers and (meth)acrylic monomers, vinyl acetate, aromatic monomers, vinyl neodecanoate, and combinations thereof. The pre-emulsion is polymerized by combining the pre-emulsion with a radical initiator in a reactor to form a reaction mixture that polymerizes to form an emulsion polymer. This procedure implements novel and easily polymerizable benzophenone (meth)acrylates) into the polymer backbone preventing them from leaching out of finished coatings. Advantageously, the benzophenone-containing emulsions can be used to form paint coatings with dirt pick-up resistance while maintaining the excellent flexibility of paint finishes to limit cracking of the final film.

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Costa Mesa, CA, United States of America

Christopher Ziehm