Patent ID: 7232467

Claim:
A method of colouring porous material, which method comprises applying to the material being coloured, in any desired order successively, or simultaneously, a) at least one capped diazonium compound of formula (1) wherein Q is an unsubstituted phenyl; naphthyl; thiophenyl; 1,3-thiazolyl; 1,2-thiazolyl; 1,3-benzothiazolyl; 2,3-benzothiazolyl; imidazolyl; 1,3,4-thiadiazolyl; 1,3,5-thiadiazolyl; 1,3,4-triazolyl; pyrazolyl; benzimidazolyl; benzopyrazolyl; pyridinyl; quinolinyl; pyrimidinyl; isoxazolyl; aminodiphenyl; aminodiphenylether and azobenzenyl or Q is a phenyl, naphthyl, thiophenyl, 1,3-thiazolyl, 1,2-thiazolyl, 1,3-benzothiazolyl, 2,3-benzothiazolyl, imidazolyl, 1,3,4-thiadiazolyl, 1,3,5-thiadiazolyl, 1,3,4-triazolyl, pyrazolyl, benzimidazolyl, benzopyrazolyl, pyridinyl, quinolinyl, pyrimidinyl and isoxazolyl, aminodiphenyl, aminodiphenylether and azobenzenyl which is mono- or poly-substituted by C 1 –C 4 alkyl, C 1 –C 4 alkoxy, C 1 –C 4 alkylthio, halogen, nitro, trifluoromethyl, CN, SCN, C 1 –C 4 alkylsulfonyl, phenylsulfonyl, benzylsulfonyl, di-C 1 –C 4 alkylaminosulfonyl, C 1 –C 4 alkyl-carbonylamino, C 1 –C 4 alkoxysulfonyl or by di-(hydroxy-C 1 –C 4 alkyl)-aminosulfonyl, R is a radical of formula —NR 16 R 17 , wherein R 16 is H; unsubstituted linear or branched C 1 –C 6 alkyl or linear or branched C 1 –C 6 alkyl, which is substituted by one or more identical or different substituent selected from the group consisting of OC 1 –C 4 alkyl, COOH, COOC 1 –C 2 alkyl, SO 3 H, NH 2 , CN, halogen and OH, and R 17 is unsubstituted linear or branched C 1 –C 6 alkyl or linear or branched C 1 –C 6 alkyl, which is substituted by one or more identical or different substituent selected from the group consisting of OC 1 –C 4 alkyl, COOH, COOC 1 –C 2 alkyl, SO 3 H, NH 2 , CN, halogen and OH, and b) at least one water-soluble coupling component under conditions such that, initially, coupling does not take place, and then causing the capped diazonium compound present on the material to react with the coupling component, with the provisos that (i) if the water-soluble coupling component is then the capped diazonium compounds is not (ii) if the water-soluble coupling component is then the capped diazonium compound is not (iii) if the water-soluble coupling component is then the capped diazonium compound is not (iv) if the water-soluble coupling component is then the capped diazonium compound is not (v) if the water-soluble coupling component is then the capped diazonium compound is not (vi) if the water-soluble coupling component is then the capped diazonium compound is not (vii) if the water-soluble coupling component is then the capped diazonium compound is not (viii) if the water-soluble coupling component is then the capped diazonium compound is not (ix) if the water-soluble coupling component is then the capped diazonium compound is not and (x) if the water-soluble coupling component is then the diazonium capped compound is not