Abstract Color developer compositions are described which contain, dissolved therein, both (a) an organic aromatic primary amino developing agent and (b) a yellow-dye-forming coupler having the structure: WHEREIN R is a branched alkyl group containing 3 to 6 carbon 10 atoms; X is Cl or Br; Y is X, hydrogen or alkyl (1 to 8 carbon atoms); and A and B differ and are either H or -COOM, wherein M is a photographically inactive cation or a methyl or ethyl group. Use of such compositions results in more efficient coupler usage and color products having yellow dyes with improved aging characteristics. The invention encompasses such liquid developer compositions, blends of (a) and (b), and the yellow dye-forming couplers, per se.
IN A COLOR DEVELOPER COMPOSITION COMPRISING AT LEAST ONE ORGANIC AROMATIC PRIMARY AMINO DEVELOPING AGENT AND A YELLOW-DYE-FORMING COUPLER MATERIAL; THE IMPROVEMENT WHICH COMPRISES USING AS SAID YELLOW-DYE-FORMING COUPLER MATERIAL A COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
35 words
IN A COLOR DEVELOPER COMPOSITION COMPRISING AT LEAST ONE ORGANIC AROMATIC PRIMARY AMINO DEVELOPING AGENT AND A YELLOW-DYE-FORMING COUPLER MATERIAL; THE IMPROVEMENT WHICH COMPRISES USING AS SAID YELLOW-DYE-FORMING COUPLER MATERIAL A COMPOUND HAVING THE STRUCTURE:
Claim 3
Dependent Claim
43 words
An improved developer composition as in claim 1, wherein R is t-butyl, Y is hydrogen, and M is selected from the group consisting of hydrogen, alkali metal, ammonium and tertiary amino cations, and wherein said developing agent is a p-phenylenediamine-type color developing agent.
Claim 4
Dependent Claim
16 words
An improved developer composition as in claim 2, wherein said coupler material is a 2,4-dichloroacetanilide compound.
Claim 5
Dependent Claim
17 words
An improved developer composition as in claim 1, wherein said coupler material is Alpha -4-carboxyphenoxy- Beta -pivalyl-2,4-dichloroacetanilide.