Patent EP0036221A1 successfully refreshed from Google Patents.
EP0036221A1
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Photosensitive material and a process for reproducing photo-information
Assignee: Agfa Gevaert NV
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Filing: 1981-01-20
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Granted: —
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Expires: 2001-01-20
Abstract
Abstract Photosensitive recording material and process for producing wash-off images therewith, which material comprises on a support: (1) a photosensitive recording layer capable of obtaining in the photo-exposed area a selective increase or decrease of solubility in an alkaline aqueous liquid so that it can yield a negative or positive resist pattern by wash-off treatment with an aqueous alkaline liquid, (2) subjacent to said photosensitive layer and in water permeable relationship therewith a dyed and/or pigmented alkali-soluble non-photosensitive binder layer, characterized in that said non-photosensitive layer comprises in a proportion of at least 50% by weight with respect to the dye(s) and/or pigment(s) a non-gelatinaceous binder being a binding agent or mixture of binding agents containing free carboxylic acid groups in such a degree that it has a total acid number between 90 and 350, the non-photosensitive binder layer being not soluble in pure water at 20°C but soluble in a 0.5% by weight aqueous sodium hydroxide solution at 20°C.
Inventors
- 👤 Urbain Leopold Laridon
- 👤 Augustijn Maria Meisters
- 👤 Jan Jozef Priem
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 10:14
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54; G03F1/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
154 words
Photosensitive recording material which comprises on a support : (1) a photosensitive recording layer capable of obtaining in the photo-exposed area a selective increase or decrease of solubility in an alkaline aqueous liquid so that it can yield a negative or positive resist pattern by wash-off treatment with an aqueous alkaline liquid, (2) subjacent to said photosensitive layer and in water- permeable relationship therewith a dyed and/or pigmented alkali-soluble non-photosensitive binder layer, characterized in that said non-photosensitive layer comprises in a proportion of at least 50 % by weight with respect to the dye(s) and/or pigment(s) a non-gelatinaceous binder being a binding agent or mixture of binding agents containing free carboxylic acid groups in such a degree that it has a total acid number between 90 and 350, the non-photosensitive binder layer being not soluble in pure water at 20°C but soluble in a 0.5 % by weight aqueous sodium hydroxide solution at 20°C.
Claim 2
Dependent Claim
154 words
Photosensitive recording material which comprises on a support : (1) a photosensitive recording layer capable of obtaining in the photo-exposed area a selective increase or decrease of solubility in an alkaline aqueous liquid so that it can yield a negative or positive resist pattern by wash-off treatment with an aqueous alkaline liquid, (2) subjacent to said photosensitive layer and in water- permeable relationship therewith a dyed and/or pigmented alkali-soluble non-photosensitive binder layer, characterized in that said non-photosensitive layer comprises in a proportion of at least 50 % by weight with respect to the dye(s) and/or pigment(s) a non-gelatinaceous binder being a binding agent or mixture of binding agents containing free carboxylic acid groups in such a degree that it has a total acid number between 90 and 350, the non-photosensitive binder layer being not soluble in pure water at 20°C but soluble in a 0.5 % by weight aqueous sodium hydroxide solution at 20°C.
Claim 3
Dependent Claim
55 words
Photosensitive recording material according to claim 1, characterized in that the binding agent or mixture of binding agents of the dyed and/or pigmented non-photosensitive layer is selected in such a way that it is not or only at most 10 % by weight at 20°C soluble in the solvent wherefrom the photosensitive layer is coated.
Claim 4
Dependent Claim
36 words
Photosensitive recording material according to claim 1 or 2, characterized in that, the binder of the non-photosensitive layer is applied from an aqueous dispersion and the photosensitive layer is applied from a solution containing organic solvent(s).
Claim 5
Dependent Claim
45 words
Photosensitive recording material according to any of claims 1 to 3, characterized in that, the binder of the non-photosensitive layer is a copolymer of an alkyl(meth)acrylate and (meth)acrylic acid wherein the (meth)acrylic acid content is in the range of 20 to 50 % by weight.
Claim 6
Dependent Claim
28 words
Photosensitive recording material according to any of the claims 1 to 4, characterized in that, the non-photosensitive layer contains dispersed therein a non-migratory organic dye or carbon black.
Claim 7
Dependent Claim
29 words
Photosensitive recording material according to any of the claims 1 to 5, characterized in that the non-photosensitive layer has a thickness in the -range of 0.5 to 20 pm.
Claim 8
Dependent Claim
31 words
Photosensitive recording material according to any of the claims 1 to 6, characterized in that, the support has a composite structure including a layer that imparts to it a light-reflecting property.
Claim 9
Dependent Claim
21 words
Photosensitive recording material according to claim 7, characterized in that said layer is a binder- coating containing partially embedded glass beads.
Claim 10
Dependent Claim
34 words
Photosensitive recording material according to any of claims 1 to 8, characterized in that the support at its rear-side is provided with a pressure sensitive adhesive layer covered with a peel-off sheet or ribbon.
Claim 11
Dependent Claim
108 words
Process for the reproducing of information comprising the steps of (1) information-wise photo-exposing the photosensitive layer of the recording material of any of the claims 1 to 9, to selectively increase or reduce the alkali-solubility thereof in the exposed area, (2) treating the photo-exposed layer with an aqueous alkaline liquid free from organic solvents to easy the removal of the more soluble parts of the photosensitive layer and also of the portions of the non-photosensitive layer of said recording material that are underlying the more soluble portions of the photosensitive layer and (3) smooth rubbing and rinsing with water to effect the wash-off of said parts and portions.
Claim 12
Dependent Claim
29 words
Process according to claim 10, wherein the aqueous alkaline liquid has an alkalinity not higher than obtained with a 3 % by weight aqueous sodium hydroxide solution at 20°C.
References Cited (Backward Citations)
DE2623925A1
Cited
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