US Patent 7438972 - Resin coated nanoparticle flexible film

http://www.freepatentsonline.com/7438972.html

This patent from PPG Industries Ohio teaches using resin-coated pigment nanoparticles in a film coating in order to avoid clumping of the nanoparticles upon distortion or stretching of the film. Claim 1 reads:

1. A coated flexible and/or drawable substrate comprising:

a flexible and/or drawable substrate; and

a cured film over at least a portion of the substrate, wherein the cured film has been deposited from a coating composition comprising a dispersion of resin-coated nanoparticles.