Patent ID: 7268176

Claim:
An additive comprising a mixture of: a) an aminoplast; b) silica particles having an average particle size below one micron dispersed in organic solvent, and c) a functional siloxane having the following structure: wherein R 16 , R 17 , R 18 , R 19 , R 20 , R 21 , and R 23 are each a monovalent hydrocarbon group of 1 to 10 carbon atoms and can be the same or different; R 22 , R 24 , and R 25 are each a divalent hydrocarbon group of 1 to 24 carbon atoms and can be the same or different; Z 1 , Z 2 , and Z 3 are each an active hydrogen group reactive with the aminoplast and can be the same or different; and n and m are 0 to 12, wherein component (a) is present in an amount of between 90 and 60 weight percent and component (b) is present in an amount between 10 and 40 weight percent, with the weight percent being based on the total weight of (a) and (b), and wherein the additive does not include any other film-forming resin.