US4148653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restraining layer for retarding the diffusion of hydroxyl ions in the dye diffusion transfer process
Assignee: Agfa Gevaert AG
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Filing: 1977-01-12
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Granted: 1979-04-10
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Expires: 1997-01-12
Abstract
Abstract A restraining layer capable of retarding the diffusion of hydroxyl groups is of particular use in a neutralization system for the dye diffusion transfer process. The restraining layer of the invention comprises a film-forming linear polymer consisting of alternating hydrophilic and hydrophobic segments joined to one another by carbonate, urethane and/or ester groups. The neutralization system provides retarded reduction of pH in the photographic material.
Inventors
- 👤 Wulf von Bonin
- 👤 Erich Wolff
- 👤 Werner Krafft
- 👤 Gunther Matschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:17
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31565; Y10T428/31786; Y10T428/3179; Y10T428/31797
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
306 words
A photographic material for the production of colored images by the dye diffusion process comprising: (a) at least one transparent layer support (b) an image receiving layer (c) a light reflecting layer or means to produce such light-reflective layer (d) a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer, said reflecting layer being located between said image receiving layer and the photosensitive element (e) at least one restraining layer capable of retarding the diffusion of hydroxyl ions located between a first group and a second group of layers of said photographic material, said first group comprising at least one color unit of said photosensitive element (d), and (f) a rupturable container containing an alkaline processing composition and capable of discharging, on applying to it a compressive force, its content between said restraining layer and said first group of layers or between two layers of said first group of layers, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 2
Dependent Claim
306 words
A photographic material for the production of colored images by the dye diffusion process comprising: (a) at least one transparent layer support (b) an image receiving layer (c) a light reflecting layer or means to produce such light-reflective layer (d) a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer, said reflecting layer being located between said image receiving layer and the photosensitive element (e) at least one restraining layer capable of retarding the diffusion of hydroxyl ions located between a first group and a second group of layers of said photographic material, said first group comprising at least one color unit of said photosensitive element (d), and (f) a rupturable container containing an alkaline processing composition and capable of discharging, on applying to it a compressive force, its content between said restraining layer and said first group of layers or between two layers of said first group of layers, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 3
Dependent Claim
27 words
The material as claimed in claim 1 in which in the restraining layer the hydrophilic segments of the polymer have a molecular weight of up to 5,000.
Claim 4
Dependent Claim
55 words
The material as claimed in claim 1 in which in the restraining layer the hydrophilic segment is the residue obtained by removal of two terminal hydroxyl groups from a polyalkylene glycol of one or more compounds selected from the group consisting of ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide (tetrahydrofuran), styrene oxide and epichlorohydrin.
Claim 5
Dependent Claim
41 words
The material as claimed in claim 1 in which in the restraining layer the hydrophilic segment consists of the residue obtained by removal of two terminal hydroxyl groups from a polyethylene oxide having a molecular weight of from 150 to 2,500.
Claim 6
Dependent Claim
26 words
The material as claimed in claim 1 in which in the restraining layer the hydrophilic segments are derived from two or more different poly alkylene glycols.
Claim 7
Dependent Claim
24 words
The material as claimed in claim 1 in which in the restraining layer the hydrophobic segment is a bivalent alkylene, arylene or aralkylene radical.
Claim 8
Dependent Claim
43 words
The material as claimed in claim 1 in which in the restraining layer the hydrophobic segment is the bivalent radical of a linear prepolymer selected from the group consisting of polyesters, polyurethanes, polyamides and polyureas, having a molecular weight of up to 10,000.
Claim 9
Dependent Claim
283 words
A photographic material for the production of colored images by the dye-diffusion process comprising: (a) a first transparent layer support (b) a laminate arranged on said layer support, said laminate comprising in the following order, an image-receiving layer, a light-reflecting layer and a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer (c) a second transparent layer support (d) a neutralisation system on said second transparent support comprising an acid polymer layer and a restraining layer capable of retarding the diffusion of hydroxyl ions, said restraining layer being located between said acid polymer layer and said laminate, and (e) a rupturable container containing an alkaline processing composition and capable of discharging, on applying to it a compressive force, its content between said laminate and said neutralisation system, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 10
Dependent Claim
283 words
A photographic material for the production of colored images by the dye-diffusion process comprising: (a) a first transparent layer support (b) a laminate arranged on said layer support, said laminate comprising in the following order, an image-receiving layer, a light-reflecting layer and a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer (c) a second transparent layer support (d) a neutralisation system on said second transparent support comprising an acid polymer layer and a restraining layer capable of retarding the diffusion of hydroxyl ions, said restraining layer being located between said acid polymer layer and said laminate, and (e) a rupturable container containing an alkaline processing composition and capable of discharging, on applying to it a compressive force, its content between said laminate and said neutralisation system, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 11
Dependent Claim
27 words
The material as claimed in claim 8 in which in the restraining layer the hydrophilic segments of the polymer have a molecular weight of up to 5,000.
Claim 12
Dependent Claim
55 words
The material is claimed in claim 8 in which in the restraining layer the hydrophilic segment is the residue obtained by removal of two terminal hydroxyl groups from a polyalkylene glycol of one or more compounds selected from the group consisting of ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide (tetrahydrofuran), styrene oxide and epichlorohydrin.
Claim 13
Dependent Claim
41 words
The material as claimed in claim 8, in which in the restraining layer the hydrophilic segment consists of the residue obtained by removal of two terminal hydroxyl groups from a polyethylene oxide having a molecular weight of from 150 to 2,500.
Claim 14
Dependent Claim
26 words
The material as claimed in claim 8 in which in the restraining layer the hydrophilic segments are derived from two or more different poly alkylene glycols.
Claim 15
Dependent Claim
24 words
The material as claimed in claim 8 in which in the restraining layer the hydrophobic segment is a bivalent alkylene, arylene or aralkylene radical.
Claim 16
Dependent Claim
43 words
The material as claimed in claim 8 in which in the restraining layer the hydrophobic segment is the bivalent radical of a linear prepolymer selected from the group consisting of polyesters, polyurethanes, polyamides and polyureas, having a molecular weight of up to 10,000.
Claim 17
Dependent Claim
239 words
A neutralisation system consisting of an acid polymer layer and a restraining layer on a transparent layer support said acid layer being more adjacent to the layer support than said restraining layer, and said system being adapted to be processed in contact with an imagewise exposed photosensitive material by passing it together with said photosensitive material between a pair of juxtaposed pressure-applying members and thereby distributing an alkaline processing composition between said neutralisation system and said photosensitive material, said restraining layer being capable of retarding the diffusion of hydroxyl ions from said processing composition into said acid polymer layer, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 18
Dependent Claim
239 words
A neutralisation system consisting of an acid polymer layer and a restraining layer on a transparent layer support said acid layer being more adjacent to the layer support than said restraining layer, and said system being adapted to be processed in contact with an imagewise exposed photosensitive material by passing it together with said photosensitive material between a pair of juxtaposed pressure-applying members and thereby distributing an alkaline processing composition between said neutralisation system and said photosensitive material, said restraining layer being capable of retarding the diffusion of hydroxyl ions from said processing composition into said acid polymer layer, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 19
Dependent Claim
28 words
The neutralisation system as claimed in claim 15 in which in the restraining layer the hydrophilic segments of the polymer have a molecular weight of up to 5,000.
Claim 20
Dependent Claim
54 words
The neutralisation system in claim 15 in which in the restraining layer the hydrophilic segment in the residue obtained by removal of two terminal hydroxyl groups from a polyalkylene glycol of one or more compounds selected from the group consisting of ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide (tetrahydrofuran), styrene oxide and epichlorohydrin.
Claim 21
Dependent Claim
42 words
The neutralisation system as claimed in claim 15 in which in the restraining layer the hydrophilic segment consists of the residue obtained by removal of two terminal hydroxyl groups from a polyethylene oxide having a molecular weight of from 150 to 2,500.
Claim 22
Dependent Claim
27 words
The neutralisation system as claimed in claim 15 in which in the restraining layer the hydrophilic segments are derived from two or more different poly alkylene glycols.
Claim 23
Dependent Claim
25 words
The neutralisation system as claimed in claim 15 in which in the restraining layer the hydrophobic segment is a bivalent alkylene, arylene or aralkylene radical.
Claim 24
Dependent Claim
44 words
The neutralisation system as claimed in claim 15 in which in the restraining layer the hydrophobic segment is the bivalent radical of a linear prepolymer selected from the group consisting of polyesters, polyurethanes, polyamides and polyureas, having a molecular weight of up to 10,000.
Claim 25
Dependent Claim
289 words
A photographic material for the production of colored images by the dye-diffusion process comprising: (a) a first transparent layer support (b) a laminate arranged on said layer support, said laminate comprising in the following order, (i) an image-receiving layer, (ii) a light-reflecting layer and (iii) a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer (c) a neutralisation system arranged between said first transparent support and said laminate, said neutralisation system comprising an acid polymer layer and a restraining layer capable of retarding the diffusion of hydroxyl ions, said restraining layer being located between said acid polymer layer and said laminate, and (d) a rupturable container containing an alkaline processing solution and capable of discharging, on applying to it a compressive force, its content between said laminate, and a second transparent layer support, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
Claim 26
Dependent Claim
289 words
A photographic material for the production of colored images by the dye-diffusion process comprising: (a) a first transparent layer support (b) a laminate arranged on said layer support, said laminate comprising in the following order, (i) an image-receiving layer, (ii) a light-reflecting layer and (iii) a photosensitive element containing at least one color unit comprised of a photosensitive silver halide emulsion layer and a dye-providing compound associated to said photosensitive layer (c) a neutralisation system arranged between said first transparent support and said laminate, said neutralisation system comprising an acid polymer layer and a restraining layer capable of retarding the diffusion of hydroxyl ions, said restraining layer being located between said acid polymer layer and said laminate, and (d) a rupturable container containing an alkaline processing solution and capable of discharging, on applying to it a compressive force, its content between said laminate, and a second transparent layer support, wherein the improvement comprises the restraining layer consists essentially of a film-forming linear polymer of a molecular weight of from 5,000 to 100,000 and the linear chain of the polymer is comprised of alternating hydrophilic polyether segments with a molecular weight of 150 to 20,000 in which three or more alkylene groups are separated by oxygen atoms, so that a maximum of four carbon atoms are present between two adjacent oxygen atoms and hydrophobic segments formed from bifunctional organic compounds containing two reactive groups capable of reacting with the terminal hydroxyl groups of polyether glycols to form connecting members selected from the group consisting of carbonate, urethane and ester connecting members, by removal of said reactive groups, said alternating hydrophilic and hydrophobic segments being joined to one another through connecting members selected from said carbonate, urethane and ester connecting members.
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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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |