US4279985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymer imaging using epoxy and bromine containing ethylenically unsaturated compounds
Assignee: Hitachi Ltd
•
Filing: 1979-04-27
•
Granted: 1981-07-21
•
Expires: 1999-04-27
Abstract
Abstract A method for forming radiation images by using a polymeric compound having in the molecule a plurality of epoxy groups and a plurality of bromine atoms. The polymeric compound has a high radiation sensitivity and high contrast.
Inventors
- 👤 Saburo Nonogaki
- 👤 Yoshio Hatano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08C; C08C19/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/108
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
181 words
A method for forming radiation images comprising the steps of (a) preparing a substrate, (b) forming on said substrate a radiation-sensitive film composed of at least one polymeric compound selected from the group consisting of brominated and epoxidized polymers of butadiene, brominated and epoxidized copolymers of butadiene, brominated and epoxidized polymers of isoprene, brominated and epoxidized copolymers of isoprene, brominated products of copolymers of butadiene with addition-polymerizable compounds containing an epoxy group, brominated products of copolymers of isoprene with addition-polymerizable compounds containing an epoxy group and epoxidized products of copolymers of one of butadiene and isoprene with addition-polymerizable compounds containing at least one bromine atom, wherein the degree of epoxidation of the polymeric compound is about 17 to about 70% and the degree of bromination of the polymeric compound is about 7 to about 50%, the value of the sum of the epoxidation degree and bromination degree being lower than 100%, (c) exposing at least a part of said film to radiations to thereby render said part of the film solvent-insoluble, and (d) removing solvent-soluble parts of said film by development.
Claim 2
Independent Claim
181 words
A method for forming radiation images comprising the steps of (a) preparing a substrate, (b) forming on said substrate a radiation-sensitive film composed of at least one polymeric compound selected from the group consisting of brominated and epoxidized polymers of butadiene, brominated and epoxidized copolymers of butadiene, brominated and epoxidized polymers of isoprene, brominated and epoxidized copolymers of isoprene, brominated products of copolymers of butadiene with addition-polymerizable compounds containing an epoxy group, brominated products of copolymers of isoprene with addition-polymerizable compounds containing an epoxy group and epoxidized products of copolymers of one of butadiene and isoprene with addition-polymerizable compounds containing at least one bromine atom, wherein the degree of epoxidation of the polymeric compound is about 17 to about 70% and the degree of bromination of the polymeric compound is about 7 to about 50%, the value of the sum of the epoxidation degree and bromination degree being lower than 100%, (c) exposing at least a part of said film to radiations to thereby render said part of the film solvent-insoluble, and (d) removing solvent-soluble parts of said film by development.
Claim 3
Dependent Claim
41 words
A method for forming radiation images according to claim 1 wherein the development is carried out by using a solvent selected from the group consisting of dioxane, butyl acetate, a butyl acetate-ethyl cellosolve mixed solvent and a dioxane-ethyl cellosolve mixed solvent.
Claim 4
Dependent Claim
28 words
A method for forming radiation images according to claim 1 wherein the molecular weight of the polymeric compound is in the range from about 1,000 to about 10,000,000.
Claim 5
Dependent Claim
31 words
A method for forming radiation images according to claim 1 wherein the polymer of butadiene is selected from the group consisting of 1,2-polybutadiene, 1,4-polybutadiene and polybutadienes having both 1,2- and 1,4-structures.
Claim 6
Dependent Claim
30 words
A method for forming radiation images according to claim 1 wherein the polymer of isoprene is selected from the group consisting of 1,2-polyisoprene, 1,4-polyisoprene and polyisoprenes having both 1,2-and 1,4-structures.
Claim 7
Dependent Claim
116 words
A method for forming radiation images according to claim 1 wherein the copolymer of butadiene is a copolymer of butadiene with at least one monomer selected from the group consisting of aconitic acid, acrylonitrile, benzalacetophenone, butyl acrylate, 2-chlorobenzalacetophenone, 2-chloro-1,3-butadiene, p-chlorostyrene, 1-cyano-1,3-butadiene, 2,5-dichlorostyrene, diethyl fumarate, 1,1-dihydroperfluorobutyl acrylate, dimethyl butadiene, 2,3-dimethyl-1,3-butadiene, dimethyl dithiolfumarate, dinonyl fumarate, dinonyl maleate, ethyl-1-cyanocinnamate, hydrononyl acrylate, isobutylene, isoprene, methacrylic acid, methacrylonitrile, methyl acrylate, methyl-2-chlorocinnamate, methyl-4-chlorocinnamate, methyl methacrylate, α-methylstyrene, methyl thiolacrylate, 2-methyl-5-vinylpyridine, nonyl methacrylate, styrene, triethyl aconitate, trimethyl aconitate, vinyl chloride, vinyl formate, vinylidene chloride, vinylidene bromide, vinyl nonanoate, vinyl octadecanoate, vinyl pinonate and vinyl undecenoate, and the diene monomer units occupy about 50 to about 95% of the total monomer units in the copolymer.
Claim 8
Dependent Claim
63 words
A method for forming radiation images according to claim 1 wherein the copolymer of isoprene is a copolymer of isoprene with at least one monomer selected from the group consisting of acrylonitrile, 2-chloro-1,3-butadiene, dimethylbutadiene, 2,3-dimethylbutadiene, 2-fluorobutadiene, hexafluorobutadiene, isobutylene, piperylene, propylene, styrene, 2-vinylpyridine and 2-vinylquinoline, and the diene monomer units occupy about 50 to about 95% of the total monomer units in the copolymer.
Claim 9
Dependent Claim
25 words
A method for forming radiation images according to claim 1 wherein the epoxy group-containing addition-polymerizable compound is a glycidyl ester of an unsaturated fatty acid.
Claim 10
Dependent Claim
33 words
A method for forming radiation images according to claim 8 wherein the glycidyl ester of an unsaturated fatty acid is a member selected from the group consisting of glycigyl methacrylate and glycidyl acrylate.
Claim 11
Dependent Claim
18 words
A method for forming radiation images according to claim 1 wherein the bromine-containing, addition-polymerizable compound is vinylidene bromide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |