Patent US4845009A successfully refreshed from Google Patents.
US4845009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive composition comprising a polymer with maleimido group in side chain and a diazo resin
Assignee: Fujifilm Holdings Corp
•
Filing: 1986-09-17
•
Granted: 1989-07-04
•
Expires: 2006-09-17
Abstract
Abstract The present invention relates to a photosensitive composition suitable for the use in the preparation of a photosensitive lithographic plate. The photosensitive composition comprises (1) a polymer having a maleimido group in its side chain and being capable of being photocrosslinked, such as a copolymer of methyl methacrylate/N-[2-(methacryloyloxy)-ethyl]-2,3-dimethylmaleimide/methacrylic acid=15/65/20 (weight ratio) and (2) a diazo resin such as dodecylbenzenesulfonate of condensate of p-diazodiphenylamine and formaldehyde.
Inventors
- 👤 Nobuyuki Kita
- 👤 Masanori Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:33
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021; G03F7/0212
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
A photosensitive composition, which comprises, in admixture, (A) 10 to 99% by weight of a polymer having a side chain containing a maleimido group represented by the following formula (I): ##STR5## wherein R 1 and R 2 each represent a hydrogen atom, a halogen atom or an alkyl group or R 1 and R 2 may form together a five-membered or six-membered ring, the polymer capable of being photo-crosslinked; and (B) 0.1 to 15% by weight of a photosensitive diazo resin.
Claim 2
Dependent Claim
81 words
A photosensitive composition, which comprises, in admixture, (A) 10 to 99% by weight of a polymer having a side chain containing a maleimido group represented by the following formula (I): ##STR5## wherein R 1 and R 2 each represent a hydrogen atom, a halogen atom or an alkyl group or R 1 and R 2 may form together a five-membered or six-membered ring, the polymer capable of being photo-crosslinked; and (B) 0.1 to 15% by weight of a photosensitive diazo resin.
Claim 3
Dependent Claim
39 words
A photosensitive composition as set forth in claim 1, wherein the polymer capable of being photocrosslinked has two or more maleimido groups on average per molecule in its side chain and an average molecular weight of at least 1000.
Claim 4
Dependent Claim
25 words
A photosensitive composition as set forth in claim 1, wherein the polymer capable of being photocrosslinked has an average molecular weight of 10,000 to 500,000.
Claim 5
Dependent Claim
36 words
A photosensitive composition as set forth in claim 1, wherein the diazo resin in reaction product obtained by condensing a diazo monomer with a condensing agent and then reacting the thus obtained produce with an anion.
Claim 6
Dependent Claim
25 words
A photosensitive composition as set forth in claim 4, wherein the molar ratio of the diazo monomer to the condensing agent is 1:1 to 1:0.5.
Claim 7
Dependent Claim
22 words
A photosensitive composition as set forth in claim 1, wherein the photosensitive composition comprises 1 to 20% by weight of a sensitizer.
Claim 8
Dependent Claim
23 words
A photosensitive composition as set forth in claim 1, wherein the photosensitive composition comprises 0.5 to 15% by weight of a photopolymerization initiator.
Claim 9
Dependent Claim
35 words
A photosensitive composition as set forth in claim 1 wherein the halogen atom is selected from the group consisting of chlorine, bromine and iodine, and wherein the alkyl group has 1 to 4 carbon atoms.
Claim 10
Dependent Claim
17 words
A photosensitive composition as set forth in claim 8 wherein the alkyl group is a methyl group.
Claim 11
Dependent Claim
98 words
A photosensitive printing plate which comprises a support and a photosensitive composition comprising, in admixture, (A) 10 to 99% by weight of a polymer having a side chain containing a maleimido group represented by the following formula (I): ##STR6## wherein R 1 and R 2 each represent a hydrogen atom, a halogen atom or an alkyl group or R 1 and R 2 may form together a five-membered or six-membered ring, the polymer capable of being photo-crosslinked; and (B) 0.1 to 15% by weight of a photosensitive diazo resin in which the composition is applied to the support.
Claim 12
Dependent Claim
98 words
A photosensitive printing plate which comprises a support and a photosensitive composition comprising, in admixture, (A) 10 to 99% by weight of a polymer having a side chain containing a maleimido group represented by the following formula (I): ##STR6## wherein R 1 and R 2 each represent a hydrogen atom, a halogen atom or an alkyl group or R 1 and R 2 may form together a five-membered or six-membered ring, the polymer capable of being photo-crosslinked; and (B) 0.1 to 15% by weight of a photosensitive diazo resin in which the composition is applied to the support.
Claim 13
Dependent Claim
27 words
A photosensitive printing plate as set forth in claim 10, wherein amount of the photosensitive composition is about 0.1 to about 10 g/m 2 on dry basis.
Claim 14
Dependent Claim
40 words
A photosensitive printing plate as set forth in claim 10, wherein the polymer capable of being photocrosslinked has two or more maleimido groups on average per molecule in its side chain and an average molecular weight of at least 1000.
Claim 15
Dependent Claim
26 words
A photosensitive printing plate as set forth in claim 10, wherein the polymer capable of being photocrosslinked has an average molecular weight of 10,000 to 500,000.
Claim 16
Dependent Claim
37 words
A photosensitive printing plate as set forth in claim 10, wherein the diazo resin is reaction product obtained by condensing a diazo monomer with a condensing agent and then reacting the thus obtained product with an anion.
Claim 17
Dependent Claim
26 words
A photosensitive printing plate as set forth in claim 14, wherein the molar ratio of the diazo monomer to the condensing agent is 1:1 to 1:0.5.
Claim 18
Dependent Claim
36 words
A photosensitive printing plate as set forth in claim 10 wherein the halogen atom is selected from the group consisting of chlorine, bromine and iodine, and wherein the alkyl group has 1 to 4 carbon atoms.
Claim 19
Dependent Claim
18 words
A photosensitive printing plate as set forth in claim 16 wherein the alkyl group is a methyl group.
References Cited (Backward Citations)
US3988157A
Cited
US4289838A
Cited
US4220700A
Cited
GB2044788A
Cited
US4626497A
Cited
SU974326A1
Cited
US4416975A
Cited
US4614701A
Cited
US4720445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |