Patent ID: 6794431
Filing Date: 2004-09-21
Classification: C08K,C09D,G02B,Y10T

Abstract:
A liquid composition for coating surfaces comprising(a) about 0.01% by weight to about 2% by weight of a near infrared absorbing agent selected from the group consisting of compounds of the formula (I): [(R2NZ)2N&boxH;Zâ€²&boxH;NR2]2++2Xâˆ’â€ƒâ€ƒ(I) wherein R is an alkyl group of about 1 to about 6 carbon atoms; Z is an unsubstituted divalent phenyl or a divalent phenyl substituted with at least one moiety selected from the group consisting of alkyl, alkoxy, halogen, nitro, cyano, and carboalkoxy groups; Zâ€² is an unsubstituted quinoidal phenyl or a quinoidal phenyl substituted with at least one moiety selected from the group consisting of alkyl, alkoxy, halogen, nitro, cyano, and carboalkoxy groups; and X is an anion of a strong acid, and compounds of the formula (II):[(R2NZ)3N]++PF6âˆ’â€ƒâ€ƒ(II) wherein R is an alkyl group of about 1 to about 6 carbon atoms; Z is an unsubstituted divalent phenyl or a divalent phenyl substituted with at least one moiety selected from the group consisting of alkyl, alkoxy, halogen, nitro, cyano, and carboalkoxy groups; and X is an anion of a strong acid;(b) about 20% by weight to about 60% by weight of a carrier vehicle; and (c) about 40% by weight to about 80% by weight of a solvent system, each based on the total weight of the composition.