Patent EP0146337A2 successfully refreshed from Google Patents.
EP0146337A2
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Elements having hydrophilic layers containing hydrophobes in polymer particles and a method of making same
Assignee: Eastman Kodak Co
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Filing: 1984-12-12
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Granted: —
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Expires: 2004-12-12
Abstract
Abstract Elements, including radiation-sensitive elements (e.g. color photographic paper products), comprise a support having thereon a substantially crystal- and agglomeration-free hydrophilic layer. This layer comprises a hydrophilic composition comprising a hydrophilic binder and water-insoluble polymer particles dispersed therein. These particles have recurring units derived from one or more ethylenically unsaturated polymerizable monomers, and comprise from 0.5 to 10 percent, based on total monomer weight, of a hydrophobe uniformly distributed throughout the particles. Particularly useful polymer particles are those having recurring units derived from at least one monomer having a crosslinkable moiety. Particularly useful hydrophobes are optical brighteners.
Inventors
- 👤 Herbert Dean Remley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C7/00; G03C7/30; G03C7/388; G03C7/3882
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
76 words
An element comprising a support having thereon a hydrophilic layer which comprises a hydrophilic composition comprising a hydrophilic binder and water-insoluble polymer particles dispersed therein, the polymer particles having recurring units derived from one or more ethylenically unsaturated polymerizable monomers, the element characterized in that the hydrophilic layer is substantially crystal- and agglomeration-free and the polymer particles comprise from 0.5 to 10 percent, based on total monomer weight, of a hydrophobe uniformly distributed throughout the particles.
Claim 2
Dependent Claim
76 words
An element comprising a support having thereon a hydrophilic layer which comprises a hydrophilic composition comprising a hydrophilic binder and water-insoluble polymer particles dispersed therein, the polymer particles having recurring units derived from one or more ethylenically unsaturated polymerizable monomers, the element characterized in that the hydrophilic layer is substantially crystal- and agglomeration-free and the polymer particles comprise from 0.5 to 10 percent, based on total monomer weight, of a hydrophobe uniformly distributed throughout the particles.
Claim 3
Dependent Claim
11 words
The element as claimed in claim 1 comprising a radiation-sensitive layer.
Claim 4
Dependent Claim
29 words
The element as claimed in claim 2 which is a multilayer color photographic element comprising a paper support having thereon a plurality of photographic color-forming silver halide emulsion layers.
Claim 5
Dependent Claim
31 words
The element as claimed in any of claims 1 to 3 wherein the hydrophobe is a photographic dye, photographic dye-forming coupler, photographic developing agent, optical brightener, or ultraviolet light absorbing compound.
Claim 6
Dependent Claim
18 words
The element as claimed in any of claims 1 to 4 wherein the hydrophobe is an optical brightener.
Claim 7
Dependent Claim
37 words
The element as claimed in any of claims 1 to 5 wherein the polymer particles have recurring units derived from two or more ethylenically unsaturated polymerizable monomers, at least one of the monomers having a crosslinkable moiety.
Claim 8
Dependent Claim
121 words
The element as claimed in any of claims 1 to 6 wherein the polymer particles are composed of polymers represented by the structure: wherein -A- represents randomly recurring units derived from one or more vinyl aromatics, olefins and diolefins, vinyl esters or esters of α,β-unsaturated polymerizable carboxylic acids; -B- represents randomly recurring units derived from one or more ethylenically unsaturated polymerizable monomers having one or more anionic moieties; -C-represents randomly recurring units derived from one or more ethylenically unsaturated polymerizable monomers having a crosslinkable moiety; w represents a weight percent from 75 to 100; x represents a weight percent of from 0 to 20; and y represents a weight percent of from 0 to 5, all based on total monomer weight.
Claim 9
Dependent Claim
28 words
The element as claimed in any of claims 2 to 7 wherein the hydrophilic layer containing the polymer particles is interposed between the support and the radiation-sensitive layer(s).
Claim 10
Dependent Claim
29 words
The element as claimed in any of claims 1 to 8 wherein the hydrophobe is 2,5-bis(6-butyl-2-benzoxazolyl)thiophene optical brightener and the polymer particles are composed of poly(methyl methacrylate-co-styrene-co-ethylene glycol dimethacrylate).
Claim 11
Dependent Claim
117 words
A method of making the element as claimed in claim 1 comprising the steps of: (a) dissolving from 0.5 to 10 percent, based on total monomer weight, of a hydrophobe in solution with one or more ethylenically unsaturated polymerizable monomers; (b) dispersing and polymerizing the solution formed in step (a) in water as fine droplets under conditions sufficient to promote suspension polymerization of the monomers in the droplets and to form polymeric particles having the hydrophobe uniformly distributed throughout the particles; (c) dispersing the polymeric particles formed in step (b) in a hydrophilic binder to form a hydrophilic composition; and (d) applying the hydrophilic composition to a support to form a substantially crystal- and agglomeration-free hydrophilic layer.
Claim 12
Dependent Claim
17 words
The method as claimed in claim 10 wherein a radiation-sensitive composition is applied over the hydrophilic layer.
Claim 13
Independent Claim
18 words
The method as claimed in any of claims 10 or 11 wherein the hydrophobe is an optical brightener.
Claim 14
Independent Claim
37 words
The method as claimed in any of claims 10 to 12 wherein step (a) is carried out at a temperature greater than room temperature but less than the temperature at which spontaneous polymerization of the monomers occurs.
References Cited (Backward Citations)
No citation records indexed.
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