Use of substituted 2-(2'-hydroxyaryl)-2H-benzotriazolesulfonates as photostabilizing agents for natural and synthetic fibres
First Claim
1. A method for protecting fibres against phototendering which comprises treating the fibres under acidic conditions with a substituted benzotriazolesulfonate of the following formula:
- ##STR11## wherein R1 is hydrogen or halogen, R2 is --SO3 X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is alkyl or benzyl.
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Abstract
A method for protecting synthetic and natural fibres against phototendering. The method comprises treating the fibres with a substituted benzotriazolesulfonate of the following formula: ##STR1## wherein (I) R1 is hydrogen or halogen, R2 is hydrogen or alkyl, R3 is hydrogen or hydroxy, R4 is --SO3 X where X is hydrogen or an alkali metal, and R5 is hydrogen, with the proviso that R2 is not methyl when R1 and R3 are hydrogen; or
(II) R1, R3 and R4 are hydrogen, R2 is --SO3 X where X is hydrogen or an alkali metal, and R5 is --OR6 where R6 is hydrogen or alkyl; or
(III) R1 is hydrogen or halogen, R2 is --SO3 X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is hydrogen, alkyl or benzyl; or
(IV) R1 is --SO3 X where X is hydrogen or an alkali metal, R2 is alkyl, R3 and R5 are hydrogen, and R4 is hydrogen or alkyl;
under acidic conditions. The method is particularly suitable for treating wool, silk and nylon fibres, including blends thereof.
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Citations
16 Claims
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1. A method for protecting fibres against phototendering which comprises treating the fibres under acidic conditions with a substituted benzotriazolesulfonate of the following formula:
- ##STR11## wherein R1 is hydrogen or halogen, R2 is --SO3 X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is alkyl or benzyl.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16)
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12. A fibre which has been treated against phototendering with an agent which comprises a substituted benzotriazolesulfonate of the following formula:
- ##STR12## wherein R1 is hydrogen or halogen R2 is --SO3 X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is alkyl or benzyl;
under acidic conditions. - View Dependent Claims (13, 14)
- ##STR12## wherein R1 is hydrogen or halogen R2 is --SO3 X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is alkyl or benzyl;
Specification