Patent ID: 6630002
Filing Date: 2003-10-07
Classification: C09D

Abstract:
A process for the staining of wood, which comprises treating the unstained wood with an aqueous preparation comprisingat least one dye selected from the group consisting of the dyes of the formulae andb) at least one dye stabilizer of the formula â€ƒin which E is oxyl or hydroxyl, R is hydrogen or methyl, and n is 1 or 2, if n is 1, R1 is hydrogen, C1-C18alkyl, C2-C18alkenyl, propargyl, glycidyl, C2-C50alkyl which is unsubstituted or substituted by one to ten hydroxyl groups and which may be interrupted by one to twenty oxygen atoms, or R1 is C1-C4alkyl substituted by carboxyl or â€”COOZ, in which Z is hydrogen, C1-C4alkyl or phenyl or in which Z is C1-C4alkyl substituted by â€”(COOâˆ’)nMn+, in which n is a number 1-3 and M is a metal ion from the first, second or third group of the Periodic Table or is Zn, Cu, Ni or Co, or M is a group Nn+(R2)4, in which R2 is C1-C8alkyl or benzyl, if n is 2, R1 is C1-C12alkylene, C4-C12alkenylene, xylylene or C1-C50alkylene which is unsubstituted or substituted by one to ten hydroxyl groups and which may be interrupted by one to twenty oxygen atoms.