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US4266044A
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Novel polymeric mordanting agents for anionic compounds
Assignee: Agfa Gevaert NV
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Filing: 1978-12-11
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Granted: 1981-05-05
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Expires: 1998-12-11
Abstract
Abstract Mordanting agents for anionic organic compounds are described which comprise recurring units of the formula: ##STR1## wherein R 1 is hydrogen or methyl; A is methylene or methylene substituted by C 1 -C 5 alkyl; n is 0 or 1; R 2 is alkyl, and X is an acid radical. They are particularly suitable for hindering diffusion of dyes in hydrophilic colloid media e.g. hydrophilic colloid layers of a photographic silver halide element, for hindering diffusion of color couplers in such layers e.g. layers of a radiographic silver halide color element and for the formation of color images by the relief imbibition process.
Inventors
- 👤 Daniel M. Timmerman
- 👤 Walter F. De Winter
- 👤 Albert E. Van Hoof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835; G03C7/00; G03C7/22; G03C7/25; Y; Y10; Y10S; Y10S430/00; Y10S430/142; Y10S526/00; Y10S526/923
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A polymeric mordanting agent comprising recurring units of the general structure: ##STR10## wherein: R 1 stands for hydrogen or methyl, A stands for methylene or methylene substituted by C 1 -C 5 alkyl, n stands for 0 or 1, R 2 stands for alkyl, and X stands for an acid radical.
Claim 2
Dependent Claim
51 words
A polymeric mordanting agent comprising recurring units of the general structure: ##STR10## wherein: R 1 stands for hydrogen or methyl, A stands for methylene or methylene substituted by C 1 -C 5 alkyl, n stands for 0 or 1, R 2 stands for alkyl, and X stands for an acid radical.
Claim 3
Dependent Claim
46 words
A polymeric mordanting agent according to claim 1, wherein the said agent is a copolymer comprising in addition to the said recurring units, recurring units selected from the group consisting of (meth) acrylamide units, N-alkyl (meth)acrylamide units, alkyl(meth)acrylate units, styrene units, acrylonitrile units, and N-vinylpyrrolidone units.
Claim 4
Dependent Claim
17 words
A polymeric mordanting agent according to claim 1, wherein A is dimethyl methylene and n is 1.
Claim 5
Dependent Claim
64 words
Method of preparing a polymeric compound comprising recurring units of the general structure of claim 1, which comprises condensing the corresponding monomeric N-alkyl substituted (meth)acrylamide, which contains a keto group in the N-substituent, with aminoguanidine or a salt thereof and then polymerizing the resulting monomeric guanyl hydrazone derivative formed or copolymerizing the said monomeric guanyl hydrazone derivative with one or more other copolymerizable monomers.
Claim 6
Dependent Claim
36 words
Method according to claim 4, wherein the said polymerization or copolymerization occurs in the reaction medium of the aminoguanidine or salt thereof with the monomeric N-alkyl substituted (meth)acrylamide, which contains a keto group in the N-substituent.
References Cited (Backward Citations)
US2945006A
Cited
US3706563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |