CA1144804A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Photosensitive composition containing a diazo resin, a polyethylenically unsaturated compound and a photoinitiator
Assignee: 3M Co
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Filing: 1980-02-26
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Granted: 1983-04-19
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Expires: 2000-02-26
Abstract
Abstract FN 915,446 PHOTOSENSITIVE COMPOSITIONS AND ARTICLES Abstract of the Disclosure Photoreactive lithographic printing plate compositions ordinarily require organic solvents and/or aqueous alkaline solutions to develop the image after exposure to light. The use of such solvents or solutions for development requires an additional expense in the use of lithographic plates above the cost of the plates and requires the user to store development solutions and solvents. The present invention provides a truly water developable photoreactive printing plate composition. The plates constructed according to the present invention may be readily developed by pure water.
Inventors
- 👤 Paul M. Fuchs
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 14:58
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0955; G03F7/016; G03F7/021
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
71 words
A photoreactive composition comprising a homogeneous mixture of: A. 15-75% by weight of an organic solvent soluble film forming resin, B. 10-60% by weight of free radical polymerizable polyethylenically unsaturated compounds having at least two ethylenically unsaturated groups, C. 0.5 to 15% by weight of a free-radical photoinitiator system, D. 10-40% by weight of a water-softenable organic solvent soluble polymer, and E. 1-20% by weight of organic solvent soluble diazo resin.
Claim 2
Dependent Claim
71 words
A photoreactive composition comprising a homogeneous mixture of: A. 15-75% by weight of an organic solvent soluble film forming resin, B. 10-60% by weight of free radical polymerizable polyethylenically unsaturated compounds having at least two ethylenically unsaturated groups, C. 0.5 to 15% by weight of a free-radical photoinitiator system, D. 10-40% by weight of a water-softenable organic solvent soluble polymer, and E. 1-20% by weight of organic solvent soluble diazo resin.
Claim 3
Dependent Claim
20 words
An imageable system comprising a substrate having coated on at least one surface thereof the photoreactive composition of claim 1.
Claim 4
Dependent Claim
23 words
The imageable system of claim 2 wherein the substrate comprises aluminum the surface of which is coated with the photoreactive composition is oleophilic.
Claim 5
Dependent Claim
29 words
4, The imageable system of claim 3 wherein there is a coating of a water soluble diazo resin on the aluminum surface under the coating of the photoreactive composition.
Claim 6
Dependent Claim
30 words
The composition of claim 1 wherein at least two of the ethylenically unsaturated groups on said ethylenically unsaturated compounds are selected from the class consisting of acrylate and methacrylic groups.
Claim 7
Dependent Claim
26 words
The composition of claim 5 wherein said ethylenically unsaturated compounds have from 2 to 5 groups selected from the group consisting of acrylate and methacrylate groups.
Claim 8
Dependent Claim
33 words
The composition of claims 1 or 5 wherein said watersoftenable polymer is selected from the group consisting of polyvinylpyrrolidone, partially hydrolyzed polyvinyl acetate, hydroxyalkyl cellulose resins, and organic solvent soluble polyvinyl alcohol derivatives.
Claim 9
Dependent Claim
11 words
The composition of claim 5 wherein said water-softenable resin comprises polyvinylpyrrolidone.
Claim 10
Dependent Claim
11 words
The composition of claim 6 wherein said water-softenable resin comprises polyvinylpyrrolidone.
Claim 11
Dependent Claim
24 words
The composition of claims 1 or 5 wherein at least 0.5% by weight of a second film forming resin which is oleophilic is present.
Claim 12
Dependent Claim
18 words
The composition of claim 8 wherein at least 0.5% by weight of oleophilic film forming resin is present.
Claim 13
Dependent Claim
25 words
The composition of claim 11 wherein said oleophilic film forming resin is selected from the group consisting of cellulose acetate butyrate and cellulose acetate propionate.
Claim 14
Dependent Claim
43 words
The composition of claim 5 wherein said the group consisting of epoxy resins, polyesters, polyallyl orthophthalate prepolymers, polyallyl isophthalate prepolymers, polyvinyl formal, polyurethanes/ polyvinyl-butyral, polyoxyethylene oxides, polyvinylhydrogen phthalates, polyacrylates, polymethacrylates, cellulose acetate esters, and polyvinylchloride having a molecular weight of at least 1,000.
Claim 15
Dependent Claim
43 words
The composition of claim 5 wherein said the group consisting of epoxy resins, polyesters, polyallyl orthophthalate prepolymers, polyallyl isophthalate prepolymers, polyvinyl formal, polyurethanes, polyvinyl-butyral, polyoxyethylene oxides, polyvinylhydrogen phthalates, polyacrylates, polymethacrylates, cellulose acetate esters, and polyvinylchloride having a molecular weight of at least 1,000.
Claim 16
Dependent Claim
44 words
The composition of claim 5 wherein said the group consisting of epoxy resins, polyesters, polyallyl orthophthalate prepolymers, polyallyl isophthalate prepolymers, polyvinyl formal, polyurethanes, polyvinyl-butyral, polyoxyethylene oxides, polyvinylhydrogen phthalates, polyacrylates, polymethacrylates, cellulose acetate esters, and polyvinylchloride having a molecular weight of at least 1, 000.
Claim 17
Dependent Claim
43 words
The composition of claim 5 wherein the said group consisting of epoxy resins, polyesters, polyallyl orthophthalate prepolymers, polyallyl isophthalate prepolymers, polyvinyl formal, polyurethanes, polyvinyl-butyral, polyoxyethylene oxides, polyvinylhydrogen phthalates, polyacxylates, poly-methacrylates, cellulose acetate esters, and polyvinylchloride having a molecular weight of at least 1,000.
Claim 18
Dependent Claim
36 words
An imageable system comprising a grained and anodized aluminum substrate, a water soluble diazo resin on one surface thereof, and the photoreactive ccmposition of claim 5, 6 or 8 coated over said water soluble diazo resin.
Claim 19
Dependent Claim
23 words
A photoreactive composition comprising in homogeneous mixture a diazo resin, a free radical polymerizable polyethylenically unsaturated compound, and a free radical photoinitiator system.
Claim 20
Dependent Claim
23 words
A photoreactive composition comprising in homogeneous mixture a diazo resin, a free radical polymerizable polyethylenically unsaturated compound, and a free radical photoinitiator system.
Claim 21
Dependent Claim
33 words
The ccmposition of claim 6 wherein said solvent soluble film form-ing resin comprises a resin which is capable of crosslinking or polymerizing by itself when heated to a temperature of at least 100°C.
Claim 22
Dependent Claim
33 words
An imageable system comprising a grained and anodized aluminum substrate, a water soluble diazo resin on one surface thereof, and the photo-reactive composition of claim 7 coated over said water soluble diazo resin.
Claim 23
Dependent Claim
33 words
An imageable system comprising a grained and anodized aluminum substrate, a water soluble diazo resin on one surface thereof, and the photo-reactive composition of claims 10 coated over said water soluble diazo resin.
Claim 24
Dependent Claim
72 words
A photoreactive composition comprising a homogeneous mixture of: A. 1-75% by weight of organic solvent soluble film forming resin, B. 10-65% by weight of free radical polymerizable polyethylenically unsaturated compounds having at least two ethylenically unsaturated groups, C. 0.5 to 15% by weight of a free radical photoinitiator system, D. 5-40% by weight of a water softenable organic solvent soluble polymer, and E. 1-20% by weight of organic solvent soluble diazo resin.
Claim 25
Dependent Claim
72 words
A photoreactive composition comprising a homogeneous mixture of: A. 1-75% by weight of organic solvent soluble film forming resin, B. 10-65% by weight of free radical polymerizable polyethylenically unsaturated compounds having at least two ethylenically unsaturated groups, C. 0.5 to 15% by weight of a free radical photoinitiator system, D. 5-40% by weight of a water softenable organic solvent soluble polymer, and E. 1-20% by weight of organic solvent soluble diazo resin.
Claim 26
Dependent Claim
35 words
A photoreactive composition comprising a homogeneous mixture according to claim 22 wherein the sum of the water softenable and organic film forming resins would be equal to at least 10% by weight of the com-position.
References Cited (Backward Citations)
No citation records indexed.
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