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US 9,670,614 B2Granted
Color modification of textile
AssigneeNovozymes A/S
InventorsYucheng Zhou, Chu Wang, Lisbeth Kalum, Lars Henrik Oestergaard, Wenqi Huang
Life of this patent
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Abstract
The use of a peroxidase, a source of hydrogen peroxide and a mediator for providing a modified color in the textile is described.
Claims18
A method for processing a textile, comprising bleaching a dyed textile with a bleaching agent at a pH of 4-5 in an aqueous solution comprising a peroxidase, a source of hydrogen peroxide, and a mediator having the structure:
- wherein
- U1, U2 and U3 are identical or different and are O, S or NOH;
- and
- R1 and R2 are identical or different and are hydrogen, hydroxyl, formyl, carbamoyl or sulfono radical, ester or salt of the sulfono radical, sulfamoyl, nitro, nitroso, amino, cyano, phenyl, benzyl C1-C4-alkyl, C1-C4-alkoxy, C1-C4-carbonyl, or carbonyl-C1-C4-alkyl.
1 more element
A method for processing a textile, comprising
- (a) contacting a dyed textile with a cellulase;
- and
- (b) bleaching the dyed textile with a bleaching agent at a pH of 4-5 with a peroxidase, a source of hydrogen peroxide, and a mediator having the structure
- wherein
- U1, U2 and U3 are identical or different and are O, S or NOH;
- and
- R1 and R2 are identical or different and are hydrogen, hydroxyl, formyl, carbamoyl or sulfono radical, ester or salt of the sulfono radical, sulfamoyl, nitro, nitroso, amino, cyano, phenyl, benzyl C1-C4-alkyl, C1-C4-alkoxy, C1-C4-carbonyl, or carbonyl-C1-C4-alkyl, wherein steps (b) and (c) are performed sequentially or simultaneously in the same bath.
4 more elements
Dependencies are inferred from the claim text.