US4266005A
Expired / Lapsed
US
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Photosensitive elastomeric composition
Assignee: Asahi Kasei Corp
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Filing: 1979-09-28
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Granted: 1981-05-05
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Expires: 1999-09-28
Abstract
Abstract A novel photosensitive elastomeric composition comprising a thermoplastic elastomer, an ethylenically unsaturated compound, a photopolymerization initiator and an N-substituted maleimide compound. The composition of the present invention is excellent in photosensitivity. The composition of the present invention is useful especially for the manufacture of flexographic printing elements.
Inventors
- 👤 Shohei Nakamura
- 👤 Yoshiyuki Suenaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
282 words
A photosensitive elastomeric composition consisting essentially of 30 to 98% by weight, based on the photosensitive elastomeric composition, of a component (a) comprising at least one thermoplastic elastomer having a number average molecular weight of 29,000 to 4,500,000 and selected from homopolymers of a conjugated diene monomer and copolymers of a conjugated diene monomer and a monoene monomer, 1 to 50% by weight, based on the photosensitive elastomeric composition, of a component (b) comprising at least one ethylenically unsaturated compound, 0.01 to 10% by weight, based on the photosensitive elastomeric composition, of a component (c) comprising at least one photopolymerization initiator, and 0.01 to 10% by weight, based on the photosensitive elastomeric composition, of a component (d) comprising at least one N-substituted maleimide compound selected from those maleimides wherein an N- or N,N'-substituent is a straight chain or branched alkyl group having 1 to 22 carbon atoms, a cycloalkyl group having a C 5 -C 8 ring unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms, a phenyl or naphthyl group unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms, an aralkyl group having a straight chain or branched C 1 -C 6 alkyl moiety and a phenyl moiety unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms, a straight chain or branched alkylene group having 1 to 12 carbon atoms, a phenylene group, a biphenylene group, a 1,6-hexamethylenebiphenylene group, a methylenebiphenylene group or a 2,2-diphenylenepropane group.
Claim 2
Dependent Claim
282 words
A photosensitive elastomeric composition consisting essentially of 30 to 98% by weight, based on the photosensitive elastomeric composition, of a component (a) comprising at least one thermoplastic elastomer having a number average molecular weight of 29,000 to 4,500,000 and selected from homopolymers of a conjugated diene monomer and copolymers of a conjugated diene monomer and a monoene monomer, 1 to 50% by weight, based on the photosensitive elastomeric composition, of a component (b) comprising at least one ethylenically unsaturated compound, 0.01 to 10% by weight, based on the photosensitive elastomeric composition, of a component (c) comprising at least one photopolymerization initiator, and 0.01 to 10% by weight, based on the photosensitive elastomeric composition, of a component (d) comprising at least one N-substituted maleimide compound selected from those maleimides wherein an N- or N,N'-substituent is a straight chain or branched alkyl group having 1 to 22 carbon atoms, a cycloalkyl group having a C 5 -C 8 ring unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms, a phenyl or naphthyl group unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms, an aralkyl group having a straight chain or branched C 1 -C 6 alkyl moiety and a phenyl moiety unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms, a straight chain or branched alkylene group having 1 to 12 carbon atoms, a phenylene group, a biphenylene group, a 1,6-hexamethylenebiphenylene group, a methylenebiphenylene group or a 2,2-diphenylenepropane group.
Claim 3
Dependent Claim
129 words
A photosensitive elastomeric composition as claimed in claim 1, wherein said component (a) is at least one thermoplastic elastomer selected from a crystalline 1,2-polybutadiene having a crystallinity of 10 to 30%, an acrylonitrile-butadiene copolymer containing 30 to 50% by weight of acrylonitrile monomer units and thermoplastic elastomeric block copolymers represented by the following general formulae: (A--B).sub.n --A, (B--A).sub.n+1 --B, (A--B).sub.n+1 and (A--B).sub.m X wherein A stands for a thermoplastic non-elastomeric polymer block of a monoene monomer having a glass transition temperature of 25° C. or more, B stands for an elastomeric polymeric block of a conjugated diene monomer having a glass transition temperature of 10° C. or less, X stands for Sn or Si, n is an integer of from 1 to 10, and m is 2 or 4.
Claim 4
Dependent Claim
57 words
A photosensitive elastomeric composition as claimed in claim 2, wherein said component (a) is at least one thermoplastic elastomer selected from thermoplastic elastomeric block copolymers in which the thermoplastic nonelastomeric polymer block has a number average molecular weight of 2,000 to 100,000 and the elastomeric polymer block has a number average molecular weight of 25,000 to 1,000,000.
Claim 5
Dependent Claim
56 words
A photosensitive elastomeric composition as claimed in claim 2 or 3, wherein said component (a) is at least one thermoplastic elastomeric selected from thermoplastic elastomeric block copolymers represented by the following general formulae: A--B--A, A--B--A--B and (A--B).sub.4 Si wherein A stands for a polystyrene block and B stands for a polyisoprene block or a polybutadiene block.
Claim 6
Dependent Claim
26 words
A photosensitive elastomeric composition as claimed in claim 1, wherein said component (b) is at least one ethylenically unsaturated compound selected from diesters of fumaric acid.
Claim 7
Dependent Claim
148 words
A photosensitive elastomeric composition as claimed in claim 1, wherein said component (d) is at least one N-substituted maleimide compound selected from those maleimides wherein an N-substituent is a straight chain or branched alkyl group having 1 to 22 carbon atoms, a cycloalkyl group having a C 5 -C 8 ring unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms, a phenyl or naphthyl group unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms, or an aralkyl group having a straight chain or branched C 1 -C 6 alkyl moiety and a phenyl moiety unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms and halogen atoms.
Claim 8
Dependent Claim
80 words
A photosensitive elastomeric composition as claimed in claim 6, wherein said component (d) is at least one N-substituted maleimide compound selected from those maleimides wherein an N-substituent is a straight chain or branched alkyl group having 1 to 22 carbon atoms, a cycloalkyl group having a C 5 -C 8 ring unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms, a phenyl group, or a benzyl group.
Claim 9
Dependent Claim
72 words
A photosensitive elastomeric composition as claimed in claim 7, wherein said component (d) is at least one N-substituted maleimide compound selected from those maleimides wherein an N-substituent is a straight chain or branched alkyl group having 6 to 22 carbon atoms, or a cycloalkyl group having a C 6 ring unsubstituted or substituted with 1 or 2 substituents selected from straight chain or branched alkyl groups having 1 to 6 carbon atoms.
Claim 10
Dependent Claim
23 words
A photosensitive element comprising a support bearing a layer of a photosensitive elastomeric composition as claimed in any of claims 1 to 8.
Claim 11
Dependent Claim
23 words
A photosensitive element as claimed in claim 9, wherein said layer of the photosensitive elastomeric composition has thickness of 0.5 to 7.0 mm.
Claim 12
Dependent Claim
30 words
A photosensitive element as claimed in claim 9 or 10, wherein a flexible cover sheet is present on the side of the photosensitive elastomeric composition layer remote from the support.
Claim 13
Dependent Claim
28 words
A photosensitive element as claimed in claim 11, wherein a flexible polymer layer is interposed between the cover sheet and the surface of the photosensitive elastomeric composition layer.
Claim 14
Dependent Claim
49 words
A photosensitive elastomeric composition as claimed in claim 1, wherein said component (c) is at least one photopolymerization initiator selected from benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, α-methylolbenzoin, α-methylolbenzoin methyl ether, α-methylolbenzoin ethyl ether, benzoin phenyl ether, α-tert-butylbenzoin, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone and 2,2-diethoxyacetophenone.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |