Color modification of textile

Patent metadata

Field	Value
Publication number	US-9670614-B2
Application number	US-201214343925-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 23, 2011
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

The use of a peroxidase, a source of hydrogen peroxide and a mediator for providing a modified color in the textile is described.

First claim

The invention claimed is:

1. 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.

2. The method of claim 1 , wherein
U1, U2 and U3 are identical or different and are O or S; and
R1 and R2 are identical or different and are hydrogen, hydroxyl, methyl, ethyl, phenyl, benzyl, formyl, amino, cyano, nitroso, methoxy and/or ethoxy.

3. The method of claim 1 , wherein
U1, U2 and U3 are O; and
R1 and R2 are identical or different and are hydrogen, hydroxyl, methyl, ethyl, phenyl, benzyl, formyl, amino, cyano, nitroso, methoxy and/or ethoxy.

4. The method of claim 1 , wherein the mediator is selected from the group consisting of 1-methylvioluric acid, 1,3-dimethylvioluric acid, thiovioluric acid, violuric acid, and esters, ethers, salts and hydrates thereof.

5. The method of claim 1 , wherein the textile is denim.

6. The method of claim 1 , wherein the method is conducted at a temperature in the range of 30-50° C.

7. The method of claim 2 , wherein the method is conducted at a temperature in the range of 30-50° C.

8. The method of claim 3 , wherein the method is conducted at a temperature in the range of 30-50° C.

9. The method of claim 4 , wherein the method is conducted at a temperature in the range of 30-50° C.

10. The method of claim 1 , wherein the bleaching agent is an oxidizing agent.

11. The method of claim 1 , wherein the bleaching agent is a reducing agent.

12. The method of claim 1 , wherein the bleaching agent is an enzymatic bleaching agent.

13. The method of claim 1 , wherein the peroxidase has an amino acid sequence which is at least 90% identity to SEQ ID NO: 1 or SEQ ID NO: 2.

14. The method of claim 1 , wherein the peroxidase has an amino acid sequence which has at least 95% sequence identity to SEQ ID NO: 1 or SEQ ID NO: 2.

15. The method of claim 1 , wherein the peroxidase has the amino acid sequence of SEQ ID NO: 1 or SEQ ID NO: 2.

16. 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.

17. The method of claim 16 , wherein step (a) is preceded by a desizing step comprising contacting the textile with an amylase.

18. The method of claim 17 , wherein the desizing step, step (a) and step (b) occur sequentially or simultaneously in the same bath.

Assignees

• Zhou Yucheng
• Wang Chu
• Kalum Lisbeth
• Oestergaard Lars Henrik
• Huang Wenqi
• Novozymes As

Inventors

• Zhou Yucheng
• Wang Chu
• Kalum Lisbeth
• Oestergaard Lars Henrik
• Huang Wenqi

Classifications

• D06L1/14

  De-sizing · CPC title

• D06L4/10

  using agents which develop oxygen (D06L4/20 takes precedence) · CPC title

• D06P5/132

  with oxidants · CPC title

• D06L4/40

  using enzymes · CPC title

• D06L1/12

  using aqueous solvents · CPC title