Coating compositions with modified particles and methods of using the same
AssigneePPG Industries Ohio, Inc.
InventorsJohn R. Schneider, Daniela White, Anthony M. Chasser, James B. O'Dwyer, Thomas R. Hockswender
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Abstract
Powder coating compositions having improved mar and scratch resistance are disclosed. The coatings generally comprise one or more particles that have been modified to render the particles more surface active. The improved resistance is achieved without affecting the appearance or mechanical performance of the coatings. Methods for using the coatings, and the substrates coated therewith, are also disclosed.
Claims47
A powder coating comprising:
- a) a film-forming resin;
- and
- b) a plurality of particles dispersed in said resin, wherein the particles have been chemically modified to have a surface tension lower than that of the film-forming resin as cured without particles.
A powder coating composition comprising:
- a) a film-forming resin;
- and
- b) a plurality of particles dispersed in said resin, wherein the particles have been modified such that they lower the surface tension of the film-forming resin.
A method for lowering the surface tension of a cured coating comprising adding to the uncured powder coating composition a particle having a lower surface tension that the cured coating has without the addition of the particle.
Dependencies are inferred from the claim text.