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US4668235A Expired / Lapsed US ⏱️ 0.0 years remaining

Use of substituted 2-(2-hydroxyaryl)-2H-benzotriazolesulfonates as photostabilizing agents for natural synthetic fibres

Assignee: Commonwealth Scientific and Industrial Research Organisation
•
Filing: 1983-12-06
•
Granted: 1987-05-26
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Expires: 2003-12-06
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Abstract

Abstract PCT No. PCT/AU83/00179 Sec. 371 Date Aug. 7, 1984 Sec. 102(e) Date Aug. 7, 1984 PCT Filed Dec. 6, 1983 PCT Pub. No. WO84/02365 PCT Pub. Date Jun. 21, 1984.A method for protecting synthetic and natural fibres against phototendering. The method comprises treating the fibres with a substituted benzotriazolesulfonate of the following formula: <IMAGE> wherein (I) R1 is hydrogen or halogen, R2 is hydrogen or alkyl, R3 is hydrogen or hydroxy, R4 is -SO3X 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 -SO3X 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 -SO3X where X is hydrogen or an alkali metal, R3 and R5 are hydrogen, and R4 is hydrogen, alkyl or benzyl; or (IV) R1 is -SO3X 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.

Inventors

  • 👤 Neil A. Evans
  • 👤 Ian H. Leaver
  • 👤 Judi Rosevear
  • 👤 Peter J. Waters
  • 👤 John F. K. Wilshire

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:19
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6426; C; C07; C07D; C07D249/00; C07D249/16; C07D249/18; C07D249/20; D06M; D06M13/00; D06M13/322; D06M13/35; D06M13/352; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 58 words
A method for protecting natural fibres against phototendering which comprises treating the fibres with a substituted benzotriazolesulfonate of the following formula: ##STR11## wherein R 1 is --SO 3 X where X is hydrogen or an alkali metal, R 2 is alkyl, R 3 and R 5 are hydrogen, and R 4 is hydrogen or alkyl; under acidic conditions.
Claim 2
Independent Claim 58 words
A method for protecting natural fibres against phototendering which comprises treating the fibres with a substituted benzotriazolesulfonate of the following formula: ##STR11## wherein R 1 is --SO 3 X where X is hydrogen or an alkali metal, R 2 is alkyl, R 3 and R 5 are hydrogen, and R 4 is hydrogen or alkyl; under acidic conditions.
Claim 3
Dependent Claim 22 words
A method as defined in claim 1, which is carried out at a pH within the range of 2.0-5.5 with sulphuric acid.
Claim 4
Dependent Claim 25 words
A method as defined in claim 1, in which the fibres are treated ith the substituted benzotriazolesulfonate for about 90 minutes at about 80° C.
Claim 5
Dependent Claim 15 words
A method as defined in claim 1, in which the liquor:fibre ratio is about 60:1.
Claim 6
Dependent Claim 21 words
A method as defined in claim 1, in which the fibre is wool including dyed wool, or silk, or blends thereof.
Claim 7
Dependent Claim 41 words
A method as defined in claim 1, in which, in the formula of the substituted benzotriazolesulfonate, the halogen is chlorine, the alkali metal is sodium, and the alkyl is methyl, ethyl, propyl (n and i) butyl (s and t), or t-amyl.
Claim 8
Dependent Claim 24 words
A method as defined in claim 1, in which the substituted benzotriazolesulfonate is selected from the group consisting of: sodium 2-(3'-t-amyl-2'-hydroxy-5'-methyl)phenyl-5-(2H)-benzotriazolesulfonate; and sodium 2-(3'-i-propyl-2'-hydroxy-5'-t-butyl)phenyl-5-(2H)-benzotriazolesulfonate.
Claim 9
Dependent Claim 15 words
A method as defined in claim 1 in which the substituted benzotriazolesulfonate is sodium, 2-(3'-t-butyl-2'-hydroxy-5'-methyl)phenyl-5-(2H)-benzotriazolesulfonate.
Claim 10
Dependent Claim 58 words
A natural fibre which has been treated against phototendering with an agent which comprises a substituted benzotriazolenesulfonate of the following formula: ##STR12## wherein R 1 is --SO 3 X where X is hydrogen or an alkali metal, R 2 is alkyl, R 3 and R 5 are hydrogen, and R 4 is hydrogen or alkyl; under acidic conditions.
Claim 11
Dependent Claim 58 words
A natural fibre which has been treated against phototendering with an agent which comprises a substituted benzotriazolenesulfonate of the following formula: ##STR12## wherein R 1 is --SO 3 X where X is hydrogen or an alkali metal, R 2 is alkyl, R 3 and R 5 are hydrogen, and R 4 is hydrogen or alkyl; under acidic conditions.

References Cited (Backward Citations)

US3383241A Cited
US3849373A Cited
US4001266A Cited
GB1494826A Cited
GB1494823A Cited
GB1494825A Cited
US4141903A Cited
US4219480A Cited
US4230867A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-05-25 1990-11-24 1991-05-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-05-25 1994-11-24 1995-05-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-05-25 1998-11-24 1999-05-26 $7700.00 Window Closed / Lapsed

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