EP0222045A1
Expired / Lapsed
EP
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Image-receiving material for silver complex diffusion transfer reversal (DTR) processing and a laminate formed therewith
Assignee: Agfa Gevaert NV
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Filing: 1985-11-15
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Granted: —
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Expires: 2005-11-15
Abstract
Abstract An image-receiving material suited for silver complex diffusion transfer processing and for forming a laminate therewith, e.g. serving as an identification document, wherein said material comprises a hydrophobic resin support or resin-coated paper support directly coated on a resin surface thereof with a DTR-image receiving layer containing developing nuclei in a binder medium and comprising in percent by weight on its total weight the following ingredients :2 % to 45 % of gelatin,25 % to 85 % of colloidal silica,1.0 % to 50 % of a copolymer consisting of copolymerized ethylene and an alpha,beta-unsaturated carboxylic acid monomer in free acid or salt form, wherein the polymerized ethylene content is not lower than 80% by weight, and0.2 % to 35 % of a siloxane having reacted through the siloxane part with the colloidal silica, the dry coverage of the image-receiving layer being in the range of 1 g to 15 g per m2.
Inventors
- 👤 Leon Louis Vermeulen
- 👤 Ludovicus Hendrik Vervloet
- 👤 Willy Paul De Smedt
- 👤 Piet Kok
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:25
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
An image-receiving material suited for silver complex diffusion transfer processing, wherein said material comprises a hydrophobic resin support or resin-coated paper support directly coated on a resin surface thereof with a DTR-image receiving layer containing developing nuclei in a binder medium and comprising in percent by weight on its total weight the following ingredients : 2 % to 45 % of gelatin, 25 % to 85 % of colloidal silica, 1.0 % to 50 % of a copolymer consisting of copolymerized ethylene and an alpha,beta-unsaturated carboxylic acid monomer in free acid or salt form, wherein the polymerized ethylene content is not lower than 80% by weight, and 0.2 % to 35 % of a siloxane having reacted through the siloxane part with the colloidal silica, the dry coverage of the image-receiving layer being in the range of 1 g to 15 g per m2.
Claim 2
Dependent Claim
144 words
An image-receiving material suited for silver complex diffusion transfer processing, wherein said material comprises a hydrophobic resin support or resin-coated paper support directly coated on a resin surface thereof with a DTR-image receiving layer containing developing nuclei in a binder medium and comprising in percent by weight on its total weight the following ingredients : 2 % to 45 % of gelatin, 25 % to 85 % of colloidal silica, 1.0 % to 50 % of a copolymer consisting of copolymerized ethylene and an alpha,beta-unsaturated carboxylic acid monomer in free acid or salt form, wherein the polymerized ethylene content is not lower than 80% by weight, and 0.2 % to 35 % of a siloxane having reacted through the siloxane part with the colloidal silica, the dry coverage of the image-receiving layer being in the range of 1 g to 15 g per m2.
Claim 3
Dependent Claim
16 words
An image-receiving material according to claim 1, wherein the alpha,beta-unsaturated carboxylic acid monomer is acrylic acid.
Claim 4
Dependent Claim
27 words
An image-receiving material according to claim 1 or 2, wherein the copolymerized ethylene is present in the copolymer in the range of 85 to 95% by weight.
Claim 5
Dependent Claim
27 words
An image-receiving material according to any of claims 1 to 3, wherein the silica has an average particle size in the range of 5 to 1,000 nm.
Claim 6
Dependent Claim
44 words
An image-receiving material according to any of the claims 1 to 4, wherein the support is made of a vinyl chloride homopolymer or copolymer, the copolymer containing at least 50 % by weight of vinyl chloride units and being free from hydrophilic recurring units.
Claim 7
Dependent Claim
131 words
An image-receiving material according to any of the claims 1 to 5, wherein the siloxane compound is within the scope of the following general formula : wherein : R¹ represents one of the following groups : Cl - CH₂ - CO - NH - A - Br - CH₂ - CO - NH - A - CH₂=CH-SO₂-CH₂-O-CH₂-SO₂-CH₂-NH-A- CH₂ = CH - - NH - A - wherein A represents a C₁-C₄ alkylene group, and wherein Y is a bivalent hydrocarbon chain including such chain interrupted by oxygen, or a bivalent hydrocarbon group that is linked at the side of the silicon atom to oxygen, X represents oxygen, each of R², R³ and R⁴ (same or different) represent a hydrocarbon group including a substituted hydrocarbon group, and n is 0 or 1.
Claim 8
Dependent Claim
55 words
A laminar article containing in an image-receiving layer a black-and-white photograph produced by the silver complex DTR-process which layer is sandwiched between a clear protective resin cover sheet and a hydrophobic resin-support or resin coated paper support, characterized in that said image-receiving layer has the composition described in any of the claims 1 to 6.
Claim 9
Dependent Claim
39 words
A laminar article according to claim 7, wherein the cover sheet is a resin sheet coated with or consisting of a resin having a lower glass transition temperature (Tg) and melting temperature (Tm) than the resin of said support.
Claim 10
Dependent Claim
21 words
A laminar article according to claim 8, wherein the cover sheet is a polyethylene terephthalate sheet coated with a polyethylene layer.
Claim 11
Dependent Claim
38 words
A laminar article according to any of claims 7 to 9, wherein the support is provided with security marks in the form of a watermark, finger print, signature, binary code pattern or printed patterns as on bank notes.
Claim 12
Dependent Claim
20 words
A laminar article according to any of claims 7 to 10, wherein the laminate contains a magnetic stripe and/or hologram.
References Cited (Backward Citations)
US2698236A
Cited
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