US5360702A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic coating compositions and photographic elements made therefrom

Assignee: Eastman Kodak Co

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Filing: 1993-01-26

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Granted: 1994-11-01

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Expires: 2013-01-26

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Abstract

Abstract Melt crystallization of a photographic composition containing dispersed particles of a filter dye and dispersed particles of oxidized developer scavenger, in particular a hydrazide or a disulfonamidophenol oxidized developer scavenger, is inhibited by dispersing the oxidized developer scavenger in the composition in the form of particles comprising the oxidized developer scavenger dispersed or dissolved in an organic solvent selected such that the following relationship is satisfied: 6.65+10.0 A-1.53 B+0.11 B.sup.2 -0.99 AB<4.0 wherein A is the weight ratio of organic solvent to oxidized developer scavenger; and B is the log P of the organic solvent.

Inventors

👤 Paul L. Zengerle
👤 Glenn M. Brown
👤 John B. Rieger

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-10-29 21:17

CPC Classifications

G; G03; G03C; G03C1/00; G03C1/005

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 122 words

A photographic element comprising a support having thereon at least one silver halide photographic emulsion layer and a layer, which is the same or different from said silver halide layer, comprising a binder having dispersed therein: a) particles comprising a filter dye; and b) particles comprising an organic solvent having dispersed therein an oxidized developer scavenger; wherein the organic solvent and the relative amounts of organic solvent and oxidized developer scavenger are selected such that the following relationship is satisfied: 6.65+10.0 A-1.53 B+0.11 B.sup.2 -0.99 AB≦4.0 wherein A is the weight ratio of organic solvent to oxidized developer scavenger; B is the log P of the organic solvent; and log P is the logarithm of n-octanol/water partition coefficient of the organic solvent.

Claim 2

Dependent Claim 122 words

Claim 3

Dependent Claim 113 words

A photographic element according to claim 1, wherein the filter dye has the formula: [D--(A).sub.y)]--X.sub.n wherein D is a chromophoric light-absorbing moiety, which comprises an aromatic ring if y is 0, A is an aromatic ring bonded directly or indirectly to D, X is a substituent, other than carboxy, having an ionizable proton, either on A or on an aromatic ring portion of D, having a pKa of about 4 to 11 in a 50/50 mixture (volume basis) of ethanol and water, y is 0 to 4, n is 1 to 7 and the compound has a log partition coefficient of from about 0 to 6 when the compound is in unionized form.

Claim 4

Dependent Claim 70 words

A photographic element according to claim 1, wherein the filter dye has the formula: ##STR8## wherein R is substituted or unsubstituted alkyl or aryl, Y is an electron withdrawing group, and R 1 is substituted or unsubstituted aryl or a substituted or unsubstituted aromatic heterocyclic nucleus,L, L', and L" are each independently a substituted or unsubstituted methine group, and x is 0 or a positive integer from 1 to 6.

Claim 5

Dependent Claim 25 words

A photographic element according to claim 1, wherein the oxidized developer scavenger compound is selected from hydrazide oxidized developer scavengers or disulfonamidophenol oxidized developer scavengers.

Claim 6

Dependent Claim 105 words

A photographic element according to claim 4, wherein the oxidized developer scavenger compound is a hydrazide having the structural formula: ##STR9## wherein R 2 represents an electron donating group R 3 represents hydrogen, alkyl, alkoxy, aryl, aryloxy, aralkyl or amino of the formula--NHR 4 where R 4 is phenyl or benzyl; with the proviso that at least one of the substituents R 2 and R 3 (a) represents a ballast group of sufficient size as to render the hydrazide compound non-diffusible in a photographic element prior to development in alkaline processing solution and (b) comprises a polar group, and n is 0, 1, or 2.

Claim 7

Dependent Claim 129 words

A photographic element according to claim 4 wherein the oxidized developer scavenger compound is a 2,4 disulfonamidophenol having the structural formula: ##STR10## wherein G is hydroxy or an alkali labile precursor thereof; each R 5 is individually alkyl of 1 to 30 carbon atoms, or aryl of 6 to 30 carbon atoms or heterocyclyl of 5 to 30 atoms containing one or more ring hetero atoms selected from nitrogen, oxygen, sulfur or selenium; and R 6 , R 7 , and R 8 are each individually hydrogen, halogen, alkyl of 1 to 30 carbon atoms, aryl of 6 to 30 carbon atoms or aryloxy of 6 to 30 carbon atoms, the scavenger being of sufficient bulk so as to be non-diffusible in the alkali permeable layers of the element.

Claim 8

Dependent Claim 20 words

A photographic element according to claim 1, wherein the filter dye is in the form of a solid particle dispersion.

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-10-31	1998-05-02	1998-11-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-10-31	2002-05-02	2002-11-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-10-31	2006-05-02	2006-11-01	$7700.00	Window Closed / Lapsed

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