Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1990-12-10
1993-03-02
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430557, G03C 736
Patent
active
051908484
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to novel photographic yellow couplers particularly for color photography containing an aryl sulphonyl or alkyl sulphonyl group in the coupling position.
In Research Disclosure June 1974 pages 34 to 40 there are described some 54 compounds containing an active ketomethylene group of the formula
We have now found that compounds of this type are more effective if the coupling group is an alkyl or aryl sulphonyl group, and wherein the terminal butyl group is replaced by a substituted or unsubstituted aryl group.
According therefore to the present invention there is provided a photographic coupler of the general formula (I): ##STR2## wherein R.sup.1 and R.sup.2 are substituted or unsubstituted aryl groups and R.sup.3 is a substituted or unsubstituted alkyl or aryl group.
In a preferred form of the invention R.sup.1 is a substituted aryl group. Such a substituted aryl group is most preferably alkoxy substituted.
The group R.sup.3 is preferably an alkyl substituted aryl group. The group R.sup.2 is in a preferred form of the invention an aryl group substituted at the 2-position by a halogen group preferably a chlorine atom. In a most preferred form of the invention the group R.sup.2 when substituted at the 2-position is also substituted at the 5-position.
The couplers of the invention may be included in a photosensitive photographic silver halide material, or in a multi colour photosensitive element comprising a support bearing a yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, and at least one of the yellow dye-forming couplers is a coupler as just described.
The invention also comprehends a method of forming a photographic colour image which comprises developing an imagewise exposed silver halide emulsion layer with a primary aromatic amino color developing agent in the presence of a color coupler in accordance with the foregoing formula (I).
The dye-forming couplers of this invention can be used in the ways and for the purposes that dye-forming couplers have been previously used in the photographic art. They may be dissolved in processing solutions (unballasted) or incorporated into photographic materials (normally ballasted).
Typically, the couplers are incorporated in silver halide emulsions and the emulsions coated on a support to form a photographic element. Alternatively, the couplers can be incorporated in photographic elements adjacent the silver halide emulsion where, during development, the coupler will be in reactive association with development products such as oxidized color developing agent. Thus, as used herein, the term "associated therewith" signifies that the coupler is in the silver halide emulsion layer or in an adjacent location where, during processing, it will come into reactive association with silver halide development products.
The photographic elements can be single color elements or multicolor elements. In a multicolor element, the yellow dye-forming couplers of this invention would usually be associated with a blue-sensitive emulsion, although they could be associated with an emulsion sensitized to a different region of the spectrum, or with a panchromatically sensitized, orthochromatically sensitized or unsensitized emulsion. Multicolor elements contain dye image-forming units sensitive to each of the three primary regions of the spectrum. Each unit can be comprised of a single emulsion layer or of multiple emulsion layers sensitive to a given region of the spectrum. The layers of the element, including the layers of the image-forming units, can be arranged in various orders as known in the art.
A typical multicolor photographic element would comprise a support bearing a yellow dye image-forming unit comprised of at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, at least one of the yellow dye-forming couplers being a coupler of this invention, and magenta and c
REFERENCES:
patent: 3415652 (1968-12-01), Porter
patent: 3542840 (1970-11-01), Porter
patent: 4021238 (1977-05-01), Hayashi et al.
patent: 4022620 (1977-05-01), Okumura et al.
patent: 4066457 (1978-01-01), Panosik et al.
patent: 4443536 (1984-04-01), Lestina
patent: 4973545 (1990-11-01), Moore
Hackh's Chemical Dictionary, 4th Ed., pp. 134,647.
53038v, 74 Radiation Chemistry and Photochemistry, vol. 70, 1969.
8393d, Chem. Abstracts, vol. 74, 1971.
Research Disclosure, Item No. 308119, Dec. 1989.
Research Disclosure, Item No. 12255, Jun. 1974.
Eastman Kodak Company
Kluegel Arthur E.
Wright Lee C.
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