Patent ID: 6506218
Filing Date: 2003-01-14
Classification: C11D

Abstract:
A process for bleaching paper comprising contacting the paper with a peroxy compound and a compound of the formula I(R1R1)Nâ€”Xâ€”N(R1R1)â€ƒâ€ƒ(1) or metal complexes thereof with transition metals, in whichR1 is a group of the formula (R2R3)Nâ€”(CH2)nâ€”, R2 and R3 are in each case a group of the formula (R4R5)Nâ€”(CH2)nâ€”, n is the numbers 2 or 3, or R2 and R3 together are the group of the formula A or R2 is hydrogen and R3 is a group of the formula R4 and R5 are in each case a group of the formula (R6R7)â€”Nâ€”(CH2)nâ€”, n is the numbers 2 or 3, or R4 and R5 together are the group of the formula A or R4 is hydrogen and R5 is a group of the formula R6 and R7 are in each case a group of the formula (R8R9)Nâ€”(CH2)nâ€”, n is the numbers 2 or 3, or R6 and R7 together are the group of the formula A or R6 is hydrogen and R7 is a group of the formula R8 and R9 together are the group of the formula A or R8 is hydrogen and R9 is a group of the formula A is a group of the formula in which a is an integer from 1 to 4, and R10 is hydrogen, C1-C30-alkyl, cycloalkyl or aryl radicals, C1-C4-alkoxy groups, substituted or unsubstituted amino or ammonium groups, halogen atoms, sulfo groups, carboxyl groups or groups of the formula â€”(CH2)râ€”COOH, â€”(CH2)râ€”SO3H, â€”(CH2)râ€”PO3H2, â€”(CH2)râ€”OH, where r is an integer from 0 to 4, and said acid groups may also be present in salt form, andX is a group of the formulae â€”(CH2)nâ€”, â€”(CH2)3â€”NR11â€”(CH2)3â€”, â€”(CH2)2â€”NR11â€”(CH2)2â€”, C2-C20-alkylene, â€”(CH2)1[Oâ€”(CH2)k]m â€”Oâ€”CH2)l)â€”, n is a number from 2 to 20, l and k are a number from 2 to 6, m is a number from 1 to 40, R11 is C1-C20-alkyl, C2-C20-dialkylamino-C2-C10-alkyl, C1-C10-alkoxy-C2-C10-alkyl, C2-C20-hydroxyalkyl, C3-C12-cycloalkyl, C4-C20-cycloalkyl-alkyl, C2-C20-alkenyl, C4-C30-dialkylamino-alkenyl, C3-C30-alkoxyalkenyl, C3-C20-hydroxyalkenyl, C5-C20-cycloalkyl-alkenyl, aryl or C7-C20-aralkyl, which are unsubstituted or substituted by C1-C8-alkyl, C2-C8-dialkylamino, C1-C6, alkoxy, hydroxy, C3-C8-cycloalkyl, C4-C12-cycloalkylalkyl, or two of these substitutents may form together an alkylene chain optionally interrupted by nitrogen or oxygen.