US4047963A
Expired / Lapsed
US
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Photopolymer compositions
Assignee: Hercules LLC
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Filing: 1976-06-17
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Granted: 1977-09-13
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Expires: 1996-06-17
Abstract
Abstract It has been found that printing elements can be prepared from a water-soluble photopolymer composition comprising (1) a water-soluble thermoplastic ethylene oxide copolymer containing 50-96% ethylene oxide, (2) from about 0.5 to about 25% by weight based on the ethylene oxide copolymer of an ethylenically unsaturated monomer having its unsaturation in the form of at least two ##STR1## groups, wherein R is hydrogen or a C 1 -C 3 alkyl group, and (3) from about 0.1 to about 10% by weight based on the ethylene oxide copolymer of a photoinitiator thermally stable at temperatures up to about 150° C. The above described photopolymer composition can be thermoformed, such as by extrusion or compression molding.
Inventors
- 👤 David A. Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:04
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
104 words
A photopolymer composition comprising (1) a water-soluble, thermoplastic ethylene oxide copolymer containing 50-96% ethylene oxide, having a reduced specific viscosity of 0.4 l to 50 at 1% concentration in water at 25° C., (2) from about 0.5 to about 25% by weight based on the ethylene oxide copolymer of an ethylenically unsaturated monomer having its unsaturation in the form of at least two ##STR17## groups, wherein R is hydrogen or a C 1 -C 3 alkyl group, and (3) from about0.1 to about 10% by weight based on the ethylene oxide copolymer of a photoinitiator thermally stable at temperatures up to about 150° C.
Claim 2
Dependent Claim
104 words
A photopolymer composition comprising (1) a water-soluble, thermoplastic ethylene oxide copolymer containing 50-96% ethylene oxide, having a reduced specific viscosity of 0.4 l to 50 at 1% concentration in water at 25° C., (2) from about 0.5 to about 25% by weight based on the ethylene oxide copolymer of an ethylenically unsaturated monomer having its unsaturation in the form of at least two ##STR17## groups, wherein R is hydrogen or a C 1 -C 3 alkyl group, and (3) from about0.1 to about 10% by weight based on the ethylene oxide copolymer of a photoinitiator thermally stable at temperatures up to about 150° C.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the ethylene oxide copolymer is a copolymer of ethylene oxide and an oxirane containing an unsaturated substituent.
Claim 4
Dependent Claim
16 words
The composition of claim 2 wherein the oxirane containing an unsaturated substituent is allyl glycidyl ether.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein the ethylene oxide copolymer is a copolymer of ethylene oxide and an unsaturated comonomer selected from propylene oxide, epichlorohydrin and methyl glycidyl ether.
Claim 6
Dependent Claim
69 words
The composition of claim 1 wherein the ethylenically unsaturated monomer is an ethylenically unsaturated monomer having the formula ##STR18## wherein R is hydrogen or a C 1 -C 3 alkyl group; R' is selected from hydrogen, a C 1 -C 3 alkyl group and phenol; and n is 1 to 6 when R' is hydrogen and 1 when R' is a C 1 -C 3 alkyl group or phenyl.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein the ethylenically unsaturated monomer is N,N'-methylene-bis(acrylamide).
Claim 8
Dependent Claim
39 words
The composition of claim 1 wherein the ethylenically unsaturated monomer is an ethylenically unsaturated monomer having the formula ##STR19## wherein R is hydrogen or a C 1 -C 3 alkyl group and R'" is hydrogen or a ##STR20## group.
Claim 9
Dependent Claim
13 words
The composition of claim 7 wherein the ethylenically unsaturated monomer is pentaerythritol triacrylate.
Claim 10
Dependent Claim
46 words
The composition of claim 1 wherein the ethylenically unsaturated monomer is an ethylenically unsaturated monomer having the formula ##STR21## wherein R is hydrogen or a C 1 -C 3 alkyl group; R'" is hydrogen or a ##STR22## group; and R"" is a methyl or ethyl group.
Claim 11
Dependent Claim
13 words
The composition of claim 9 wherein the ethylenically unsaturated monomer is trimethylolpropane triacrylate.
Claim 12
Dependent Claim
44 words
The composition of claim 1 wherein the ethylenically unsaturated monomer is an ethylenically unsaturated monomer having the formula ##STR23## wherein R is hydrogen or a C 1 -C 3 alkyl group; R''''' is hydrogen or a methyl group; and n is 2 to 4.
Claim 13
Dependent Claim
14 words
The composition of claim 11 wherein the ethylenically unsaturated monomer is triethylene glycol dimethacrylate.
Claim 14
Dependent Claim
19 words
The composition of claim 1 wherein the photoinitiator is selected from the group of benzophenone and benzoin isopropyl ether.
Claim 15
Dependent Claim
24 words
The composition of claim 1 wherein said composition contains up to 55% by weight of an inert particulate filler essentially transparent in the composition.
Claim 16
Dependent Claim
15 words
A photopolymer element comprising a support and a layer comprising the composition of claim 1.
Claim 17
Dependent Claim
17 words
The photopolymer element of claim 15 wherein said layer comprising the composition is a relief height-forming layer.
Claim 18
Dependent Claim
28 words
The photopolymer element of claim 15 wherein said support is a metal and a layer of antihalation material is disposed between said metal and said relief height-forming layer.
Claim 19
Dependent Claim
28 words
The photopolymer element of claim 15 wherein said layer comprising the composition contains up to 55% by weight of an inert particulate filler essentially transparent in the layer.
Claim 20
Dependent Claim
79 words
The process of making a printing relief which comprises admixing the components of the composition of claim 1, thermoforming the resulting mixture in the form of a sheet, laminating the sheet to a support to form a photopolymer element, exposing to actinic light selected areas of said element until substantial crosslinking takes place in the exposed areas without significant crosslinking in the unexposed areas, and removing the unexposed areas of photopolymer composition by washing the photopolymer element with water.
Claim 21
Dependent Claim
16 words
The process of claim 19 wherein the thermoforming step is carried out by means of extrusion.
Claim 22
Dependent Claim
21 words
The process of claim 19 wherein residual surface water is removed by passing a current of warm air over the relief.
Claim 23
Dependent Claim
14 words
The crosslinked composition formed by exposing the composition of claim 1 to actinic light.
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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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |