Patent ID: 6846525
Filing Date: 2005-01-25
Classification: B41M,Y10T

Abstract:
1. A recording sheet for receiving printed images which comprises a substrate and an image receiving coating situated on at least one surface of the substrate, said entire image receiving coating comprising an additive material selected from the group consisting of purine compounds, pyrimidine compounds selected from the group consisting of (a) amino pyrimidine compounds; (b) dihydroxy pyrimidine compounds; (c) pyrimidine dione compounds; (d) thiouracil compounds; (e) orotic acid compounds; (f) guanine compounds; (g) xanthine compounds selected from the group consisting of (i) hypoxanthine; (ii) xanthosine; and mixtures thereof; (h) pyrazole pyrimidine compounds; (i) pyrimidine acids; and mixtures thereof, pyrimidine salts, benzimidazole compounds selected from the group consisting of benzimidazole, 2-aminobenzimidazole, 2-amino-5,6-dimethylbenzimidozole, 5-benzimidazole carboxylic acid, 2,4,5-trimethyl benzimidazole, 2-guanidinobenzimidazole, 2-hydroxybenzimidazole, 4-(2-keto-1-benzimidazolinyl)piperidine, and mixtures thereof, imidazolidine compounds of the formula wherein R 1 and R 2 each, independently of one another, are hydrogen, alkyl, substituted alkyl, amino, amide, amino amide, or carboxyl, and R 3 , R 4 , R 5 , and R 6 each, independently of one another, are hydrogen, substituted alkyl, oxo, amino, amide, amino amide, or carboxyl, or wherein either R 3 and R 4 or R 5 and R 6 are replaced with a double bond to another atom, wherein when a ring carbon atom is bonded to an R group by a double bond, no other R group is bonded to said ring carbon atom, and X is oxygen, sulfur, or nitrogen, urazole compounds (a) of the formula wherein R 1 , R 2 , R 3 , and R 4 each, independently of one another, are hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl, (b) of the formula wherein R 1 , R 2 , R 3 , and R 4 each, independently of one another, are hydrogen, substituted alkyl, aryl, substituted aryl, arylalkyl, or substituted arylalkyl, or (c) which is β-tetralone hydantoin, pyrazole compounds of the formula wherein R 1 , R 2 , R 3 , and R 4 each, independently of one another, are hydrogen, alkyl, substituted alkyl, amide, hydroxyl, amino, carboxyl, ester, nitrile, alkoxy, halide, or carboxamidinyl, triazole compounds of the formula wherein R 1 , R 2 , R 3 , and R 4 each, independently of one another, are hydrogen, alkyl, substituted alkyl, mercaptyl, carboxyl, hydrazinyl, aryl, or substituted aryl, tetrazole compounds of the formula wherein R 1 and R 2 each, independently of the other, are hydrogen, alkyl, substituted alkyl, or amine, pyrazine compounds, and mixtures thereof, said substrate being selected from the group consisting of paper and transparent polymeric materials, said image receiving coating being suitable for receiving rapid drying images of an aqueous ink.