Basf Corporation

Basf Coatings Ag

David K Lau

Randall Gene Schmidt

John Bernard Horstman

Donald H Campbell

Gary Michael Wieber

Kenneth Christopher Fey

Gerald Lawrence Witucki

Peter Betz

Thomas C Balch

Gudrun Wiemann

Lori Jean Sutton-Poungthana

Vicki Lynn Berry

Lori Sutton - Poungthana

A coating composition, particularly a clearcoat composition, which may be a two-component clearcoat composition, comprises a film-forming material, a crosslinking agent, and a nonlinear polysiloxane polymer having a functional group reactive with the crosslinking agent. The coating composition exhibits excellent scratch resistance and adhesion of repair coating layers and sealants, such as windshield sealants.

Nonlinear polysiloxane containing coatings with improved adhesion properties

The presence of an acid catalyst in a clearcoat composition enables the production of a wrinkle-free coating in a process comprising the simultaneous curing of applied layers of both a waterborne basecoat composition as well as a solventborne clearcoat composition. The waterborne basecoat composition comprises an organic resin, a crosslinker, and a free amine. The solventborne clearcoat composition comprises an acid catalyst in an amount significantly higher than the quantity normally used in high solids original equipment manufacturer clearcoat compositions, a polymer which is crosslinkable with melamine, and a monomeric melamine type crosslinking resin for crosslinking the polymer. The process is most preferably used to make an automotive quality topcoat.

Process for making wrinkle-free coating using solventborne clearcoat

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Royal Oak, MI, United States of America

David K Lau