Patent US4826752A successfully refreshed from Google Patents.
US4826752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry photosensitive lithographic plate comprising a silicon rubber layer containing an aromatic aminosilane
Assignee: Shin-Etsu Chemical Co Ltd
•
Filing: 1987-06-18
•
Granted: 1989-05-02
•
Expires: 2007-06-18
Abstract
Abstract A dry photosensitive lithographic printing plate has a base, a photosensitive layer formed on the base and a silicone rubber layer formed on the photosensitive layer. The silicone rubber layer is formed from a silicon rubber composition containing an organopolysiloxane and a reactive aromatic aminosilane compound.
Inventors
- 👤 Susumu Yoshida
- 👤 Hiroshi Takahashi
- 👤 Hisashi Aoki
- 👤 Kiyohiro Kondow
- 👤 Tetsuya Mayuzumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:48
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/075; G03F7/0752
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
92 words
A dry photosensitive lithographic printing plate having a base, a photosensitive layer on said base and a silicone rubber layer on said photosensitive layer on said base and a silicone urbber layer on said photosensitive layer, wherein the silicone rubber layer is formed from a silicone rubber composition containing an organo-polysiloxane and a reactive aromatic aminosilane compound of the forumla: ##STR6## wherein n represents a number from 1 to 3, R 4 represents an alkyl group or phenyl group having molecular number of 1 to 3, and X represents a hydrolyzable group.
Claim 2
Dependent Claim
92 words
A dry photosensitive lithographic printing plate having a base, a photosensitive layer on said base and a silicone rubber layer on said photosensitive layer on said base and a silicone urbber layer on said photosensitive layer, wherein the silicone rubber layer is formed from a silicone rubber composition containing an organo-polysiloxane and a reactive aromatic aminosilane compound of the forumla: ##STR6## wherein n represents a number from 1 to 3, R 4 represents an alkyl group or phenyl group having molecular number of 1 to 3, and X represents a hydrolyzable group.
Claim 3
Dependent Claim
49 words
A dry photosensitive lithographic printing plate as set forth in claim 1, wherein the organo-polysiloxane has the following recurring units and a molecular weight of several thousands to several hundreds of thousands: ##STR7## wherein R 3 represents an alkyl group having 1 to 10 carbon atoms or phenyl group.
Claim 4
Dependent Claim
22 words
A dry photosensitive lithographic printing plate as set forth in claim 2, wherein at least 60% of R 3 is methyl group.
Claim 5
Dependent Claim
30 words
A dry photosensitive lithographic printing plate as set forth in claim 2, wherein the reactive aromatic aminosilane compound is used as a part or whole amount of a crosslinking agent.
Claim 6
Dependent Claim
29 words
A dry photosensitive lithographic printing plate as set forth in claim 2, wherein the reactive aromatic aminosilane compound has an aromatic nucleus in its molecule or its partial hydrolyzate.
Claim 7
Dependent Claim
44 words
A dry photosensitive lithographic printing plate as set forth in claim 7, wherein the hydrolyzable group is selected from the following functional groups: ##STR8## where R 5 and R 6 represent alkyl group or substituted alkyl groups having molecular number of 1 to 3.
Claim 8
Dependent Claim
29 words
A dry photosensitive lithographic printing plate as set forth in claim 2, wherein the amount of the reactive aromatic aminosilane compound is 0.5 to 10% based on the organo-polysiloxane.
Claim 9
Dependent Claim
31 words
A dry photosensitive lithographic printing plate as set forth in claim 2, wherein the thickness of the silicone rubber layer formed from the silicone rubber layer is about 0.5 to 10μ.
Claim 10
Dependent Claim
74 words
A dry photosensitive lithographic printing plate as set forth in claim 1, wherein the photosensitive layer contains at least one compound of which the main chain or a side chain has one of the following groups: ##STR9## wherein R and R 1 represent each an alkyl group having 1 to 10 carbon atoms and R 2 represents a hydrogen or halogen atom, an alkyl group having 1 to 10 carbon atoms or cyano group.
Claim 11
Dependent Claim
21 words
A dry photosensitive lithographic printing plate as set forth in claim 1, wherein the photosensitive layer contains an O-quinone diazide compound.
Claim 12
Dependent Claim
34 words
A dry photosensitive lithographic printing plate as set forth in claim 10, wherein the photosensitive layer further contains at least one sensitizer in amount of 2 to 8% by weight relative to the compound.
Claim 13
Dependent Claim
31 words
A dry photosensitive lithographic printing plate as set forth in claim 11, wherein the sensitizer is selected from the group consisting of 2-benzoylmethylene-1-methyl-β-naphthothiazoline, 5-nitroacenaphthene, β-chloroanthraquinone, 1,2-benzal-anthraquinone, p,p'-tetraethyldiaminodiphenyl ketone, p,p'-dimethylaminobenzophenone and 4-nitro-2-chloroaniline.
Claim 14
Dependent Claim
24 words
A dry photosensitive lithographic printing plate as set forth in claim 1, wherein the thickness of the photosensitive layer is between 0.1 to 10μ.
Claim 15
Dependent Claim
20 words
A dry photosensitive lithographic plate as set forth in claim 1, wherein the photosensitive layer is coated on a base.
Claim 16
Dependent Claim
29 words
A dry photosensitive lithographic printing plate as set forth in claim 14, wherein the base is a coated paper, a metal plate, a plastic film or a rubber plate.
Claim 17
Dependent Claim
21 words
A dry photosensitive lithographic printing plate as set forth in claim 14, wherein the base is coated with a primer layer.
Claim 18
Dependent Claim
23 words
A dry photosensitive lithographic printing plate as set forth in claim 1, wherein the silicone rubber layer is covered with a protective layer.
Claim 19
Dependent Claim
34 words
A dry photosensitive lithographic printing plate as set forth in claim 17, wherein the protective layer is a thin film or sheet of polyethylene terphthalate, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride or cellophane.
References Cited (Backward Citations)
US3953212A
Cited
JPS4973202A
Cited
US3945830A
Cited
US4347303A
Cited
US4358522A
Cited
US4496647A
Cited
US4690886A
Cited
EP0154980A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |