US3954468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation process for producing colored photopolymer systems
Assignee: HECULES INCORPORATED A CORP OF DE
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Filing: 1974-08-27
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Granted: 1976-05-04
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Expires: 1994-08-27
Abstract
Abstract A colored image in a polymer binder is obtained by polymerization of a mixture comprising (1) at least one polymerizable monomer, (2) a halogen containing activator (free radical source), (3) a binder, and (4) at least one normally bleachable dye, dissolved in said mixture; the polymerization being accomplished by imagewise exposure of said composition to a suitable dose of radiation, and is accompanied by fixing of the dye to the photopolymer. As a consequence, the dyes lose their bleaching characteristic and when the exposed areas are developed with a strong acid such as one which would normally bleach the dye, the dye is leached from only the unexposed areas. If the developer also includes an aliphatic alcohol, the unexposed areas may be removed, leaving a relief image with color in the raised portions.
Inventors
- 👤 James Marvin Lewis
- 👤 Raymond Willis Newyear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:47
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/105; Y; Y10; Y10S; Y10S430/00; Y10S430/143; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
76 words
A process which comprises: I. providing a photosensitive composition consisting essentially of: 1. at least one photopolymerizable monomer selected from the group consisting of N-vinyl amines, N-vinyl amides, N-vinylimides, acrylamines and congeners of said monomers; 2. at least one iodine containing compound which produces free radicals on exposure to suitable radiation and which thereby activates the photopolymerization of said monomer, and which is selected from the group consisting of alkyl iodides, sulfenyl iodides and sulfonyl iodides;
Claim 2
Dependent Claim
76 words
A process which comprises: I. providing a photosensitive composition consisting essentially of: 1. at least one photopolymerizable monomer selected from the group consisting of N-vinyl amines, N-vinyl amides, N-vinylimides, acrylamines and congeners of said monomers; 2. at least one iodine containing compound which produces free radicals on exposure to suitable radiation and which thereby activates the photopolymerization of said monomer, and which is selected from the group consisting of alkyl iodides, sulfenyl iodides and sulfonyl iodides;
Claim 3
Dependent Claim
84 words
at least one dye selected from the group consisting of: a. substituted anthraquinones b. binuclear merochanines c. complex merochanines d. cyanines e. 9-phenyl-fluoren-9-ols; and 4. a resin binder in which said constituents (1), (2), and (3) are dissolved to form a coating solution in which the several constituents are present in the following proportions by weight: (a) photopolymerizable monomer
100 - 300
(b) organic iodine compound
15 - 300
(c) dye or image color compound
0.005 - 5
(d) resin binder 200 - 3000
Claim 4
Dependent Claim
84 words
at least one dye selected from the group consisting of: a. substituted anthraquinones b. binuclear merochanines c. complex merochanines d. cyanines e. 9-phenyl-fluoren-9-ols; and 4. a resin binder in which said constituents (1), (2), and (3) are dissolved to form a coating solution in which the several constituents are present in the following proportions by weight: (a) photopolymerizable monomer
100 - 300
(b) organic iodine compound
15 - 300
(c) dye or image color compound
0.005 - 5
(d) resin binder 200 - 3000
Claim 5
Dependent Claim
120 words
all of the above being carried in solution in 3,000 to 10,000 parts by weight of a compatible solvent for the same: Ii. wet coating a suitable, clean substrate with a layer of said solution between about 0.1 and 5.0 mils wet thickness; Iii. drying the layer; Iv. subjecting said layer to an imagewise exposure of a dose or suitable radiation whereby said monomer photopolymerizes in the radiation affected areas; and V. leaching any color present in the unexposed portion of said layer by contacting said layer with a solution of a strong acid, whereby as a result of said exposure, photopolymerization and leaching with strong acid, the dye becomes fixed to the polymer produced by photopolymerization of said monomer.
Claim 6
Dependent Claim
120 words
all of the above being carried in solution in 3,000 to 10,000 parts by weight of a compatible solvent for the same: Ii. wet coating a suitable, clean substrate with a layer of said solution between about 0.1 and 5.0 mils wet thickness; Iii. drying the layer; Iv. subjecting said layer to an imagewise exposure of a dose or suitable radiation whereby said monomer photopolymerizes in the radiation affected areas; and V. leaching any color present in the unexposed portion of said layer by contacting said layer with a solution of a strong acid, whereby as a result of said exposure, photopolymerization and leaching with strong acid, the dye becomes fixed to the polymer produced by photopolymerization of said monomer.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the strong acid solution contains a lower aliphatic alcohol.
Claim 8
Dependent Claim
43 words
The process of claim 1 wherein the radiation used in the imagewise exposure step is selected from the group consisting of x-rays and electron beams and the composition includes at least one organometallic compound which enhances its sensitivity to x-rays and electron beams.
Claim 9
Dependent Claim
18 words
The process of claim 3 wherein the composition includes a triaryl compound of As, Bi, Sb or P.
Claim 10
Dependent Claim
13 words
The process of claim 3 wherein the strong acid is an organic acid.
Claim 11
Dependent Claim
13 words
The process of claim 3 wherein the strong acid is an inorganic acid.
Claim 12
Dependent Claim
9 words
The planographic product of the process of claim 1.
Claim 13
Dependent Claim
34 words
The product of the process of claim 2 wherein raised portions of the product are colored and depressed portions are uncolored as a consequence of color having been removed from depressed portions by leaching.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |