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US4268593A Expired / Lapsed US ⏱️ 0.0 years remaining

Recording material for color photography

Assignee: BASF Schweiz AG
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Filing: 1979-11-05
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Granted: 1981-05-19
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Expires: 1999-11-05
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Abstract

Abstract Recording material, for color photography, which contains at least one piperidine compound containing one or more alkyl-substituted phenol groups, as the light stabilizer, in at least one light-sensitive silver halide emulsion layer, one interlayer and/or one protective layer. Colored images which are obtained by image-wise exposure and development of this recording material for color photography display good stability towards the action of visible and ultraviolet light.

Inventors

  • 👤 David G. Leppard
  • 👤 Michael Rasberger

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 15:16
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/3924; G03C7/39244; G03C7/39248

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 279 words
A recording material, for colour photography, which contains at least one piperidine compound as the light stabiliser in at least one light-sensitive silver halide emulsion layer, one interlayer and/or one protective layer, wherein the piperidine compound has the formula ##STR15## in which R 1 is hydrogen or alkyl having 1 to 4 carbon atoms, R 2 is alkyl or hydroxyalkyl, each having 1 to 12 carbon atoms, alkenyl or alkynyl having 3 or 4 carbon atoms, benzyl or R 6 CO--, in which R 6 is hydrogen, alkyl having 1 to 12 carbon atoms, alkenyl having 2 or 3 carbon atoms, chloromethyl, cyclohexyl, benzyl or phenyl or phenylethyl, which are unsubstituted or substituted by two alkyl groups, each having 1 to 4 carbon atoms, and one hydroxyl group, R 3 is hydrogen or methyl, R 4 and R 5 are each alkyl having 1 to 5 carbon atoms or cycloalkyl having 5 to 8 carbon atoms and Y is hydrogen, alkyl having 1 to 12 carbon atoms or --C n H 2n COOR 7 , in which n is 0 or an integer from 1 to 10 and R 7 is hydrogen, alkyl having 1 to 18 carbon atoms, preferably methyl or ethyl, or the radical of the formula ##STR16## or Y is --CH 2 CH 2 CN or --NHCOR 8 , in which R 8 is methyl, ethyl, phenyl or benzyl, or Y is also cyano, benzyl or the radical of the formula ##STR17## in which R 1 and R 2 are as defined and R 9 is hydrogen or alkyl having 1 to 4 carbon atoms, m is 1 or 2 and p is 1 or 0.
Claim 2
Dependent Claim 279 words
A recording material, for colour photography, which contains at least one piperidine compound as the light stabiliser in at least one light-sensitive silver halide emulsion layer, one interlayer and/or one protective layer, wherein the piperidine compound has the formula ##STR15## in which R 1 is hydrogen or alkyl having 1 to 4 carbon atoms, R 2 is alkyl or hydroxyalkyl, each having 1 to 12 carbon atoms, alkenyl or alkynyl having 3 or 4 carbon atoms, benzyl or R 6 CO--, in which R 6 is hydrogen, alkyl having 1 to 12 carbon atoms, alkenyl having 2 or 3 carbon atoms, chloromethyl, cyclohexyl, benzyl or phenyl or phenylethyl, which are unsubstituted or substituted by two alkyl groups, each having 1 to 4 carbon atoms, and one hydroxyl group, R 3 is hydrogen or methyl, R 4 and R 5 are each alkyl having 1 to 5 carbon atoms or cycloalkyl having 5 to 8 carbon atoms and Y is hydrogen, alkyl having 1 to 12 carbon atoms or --C n H 2n COOR 7 , in which n is 0 or an integer from 1 to 10 and R 7 is hydrogen, alkyl having 1 to 18 carbon atoms, preferably methyl or ethyl, or the radical of the formula ##STR16## or Y is --CH 2 CH 2 CN or --NHCOR 8 , in which R 8 is methyl, ethyl, phenyl or benzyl, or Y is also cyano, benzyl or the radical of the formula ##STR17## in which R 1 and R 2 are as defined and R 9 is hydrogen or alkyl having 1 to 4 carbon atoms, m is 1 or 2 and p is 1 or 0.
Claim 3
Dependent Claim 33 words
A recording material, for colour photography, according to claim 1, wherein the piperidine compound has the formula ##STR18## in which R 10 is methyl, ethyl, benzyl, acetyl, acrylyl, methacrylyl, crotonyl, allyl or propargyl.
Claim 4
Dependent Claim 24 words
A recording material, for colour photography, according to either of claims 1 and 2, which contains the light stabilisers in combination with ultraviolet absorbers.
Claim 5
Dependent Claim 27 words
A recording material, for colour photography, according to claim 3, wherein the ultraviolet absorbers are compounds of the benzophenone, acrylonitrile, thiazolidone, benztriazole, oxazole, thiazole or imidazole type.
Claim 6
Dependent Claim 47 words
A recording material, for colour photography, according to any one of claims 1 to 4, which contains 1 to 500 mg of the light stabiliser and, if desired, of the ultraviolet absorber per m 2 of the layer in which it or they is or are incorporated.
Claim 7
Dependent Claim 68 words
A process for stabilising recording materials, for colour photography, which contain at least one light-sensitive silver halide emulsion layer, against the harmful action of light, which comprises incorporating 1 to 500 mg, per m 2 of layer, of at least one light stabiliser according to claim 1, if desired in combination with ultraviolet absorbers, into at least one silver halide emulsion layer, one interlayer and/or one protective layer.
Claim 8
Dependent Claim 31 words
A process for the production of coloured photographic images by image-wise exposure and colour development of a recording material, for colour photography, according to any one of claims 1 to 5.
Claim 9
Dependent Claim 12 words
The coloured photographic images obtained by the process according to claim 7.

References Cited (Backward Citations)

US2596926A Cited
US3183219A Cited
DE2126187A1 Cited
DE2654058A1 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-05-18 1984-11-17 1985-05-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-05-18 1988-11-17 1989-05-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-05-18 1992-11-17 1993-05-19 $7700.00 Window Closed / Lapsed

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