Patent ID: 6645257
Filing Date: 2003-11-11
Classification: B27K

Abstract:
A process for pigmenting wood, which comprises treating wood in succession:a) with a solution comprising from 0.01 to 80% by weight, based on the solution, of a compound of the formula A(B)xâ€ƒâ€ƒ(I), in which x is an integer from 1 to 8, A is the radical of a chromophore of the quinacridone, anthraquinone, perylene, indigo, quinophthalone, indanthrone, isoindolinone, isoindoline, dioxazine, azo, phthalocyanine or diketopyrrolopyrrole series which is attached to x groups B via one or more heteroatoms, these heteroatoms being selected from the group consisting of N, O and S and forming part of the radical A, B is hydrogen or a group of the formula â€ƒat least one group B not being hydrogen and, if x is a number from 2 to 8, the groups B being identical or different, and L is a group of the formula â€ƒin which R1, R2 and R3 independently of one another are C1-C6alkyl, R4 and R8 independently of one another are C1-C6alkyl, C1-C6alkyl interrupted by O, S or N(R12)2, or unsubstituted or C1-C6alkyl-, C1-C6alkoxy-, halogen-, cyano- or nitro-substituted phenyl or biphenyl, R5, R6 and R7 independently of one another are hydrogen or C1-C6alkyl, â€ƒR9 is hydrogen, C1-C6alkyl or a group of the formula â€ƒR10 and R11 independently of one another are hydrogen, C1-C6alkyl, C1-C6alkoxy, halogen, cyano, nitro, N(R12)2 or unsubstituted or halogen-, cyano-, nitro-, C1-C6alkyl- or C1-C6alkoxy-substituted phenyl, R12 and R13 are C1-C6alkyl, R14 is hydrogen or C1-C6alkyl and R16 is hydrogen, C1-C6alkyl, unsubstituted or C1-C6alkyl-substituted phenyl, Q is p,q-C2-C6alkylene which is unsubstituted or substituted one or more times by C1-C6alkoxy, C1-C6alkythio or C2-C12dialkylamino, p and q being different locants, X is a heteroatom selected from the group consisting of N, O and S, m being 0 if x is O or S and 1 if x is N, and L1 and L2 independently of one another are [-(pâ€²,qâ€²-C2-C6alkylene)-Z-]nâ€”C1-C6alkyl or C1-C6alkyl which is unsubstituted or substituted one or more times by C1-C12alkoxy, C1-C12alkylthio, C1-C24dialkylamino, C6-C12aryloxy, C6-C12arylthio, C7-C24alkylarylamino or C12-C24diarylamino, n being a number from 1 to 1000, pâ€² and qâ€² being different locants, each Z independenty of the others being a heteroatom O, S or C1-C12alkyl-substituted N, and C2-C6alkylene in the repeating units [â€”C2-C6alkylene-Z-] being identical or different, and L1 and L2 may be saturated or unsaturated 1 to 10 times, uninterrupted or interrupted at any desired points by from 1 to 10 groups selected from the group consisting of â€”(C&boxH;O)â€” and â€”C6H4â€”, and L1 and L2 may carry none or from 1 to 10 further substituents selected from the group consisting of halogen, cyano and nitro; and from 0.05 to 5% by weight, based on the solution, of a salt of the formulaKat+.Anâˆ’â€ƒâ€ƒ(II), Kat+.Â½An2âˆ’â€ƒâ€ƒ(III) orKat+.&frac13;An3âˆ’â€ƒâ€ƒ(IV), in which Kat+ is lithium, sodium, potassium or ammonium, Anâˆ’ is formate, acetate, propionate or hydrogen carbonate, An2âˆ’ is oxalate, maleate, fumarate, malonate, carbonate or hydrogen phosphate, and An3âˆ’ is citrate or phosphate, in water or an organic solvent or in a single-phase mixture thereof,b) with a solution comprising from 0.01 to 50% by weight, based on the solution, of an organic C1-C6carboxylic acid in water or an organic solvent or in a single-phase mixture thereof, and c) converting the compound of the formula (I) thermally to a pigment of the formula.