US4356247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive compositions
Assignee: Fujifilm Holdings Corp
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Filing: 1980-10-27
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Granted: 1982-10-26
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Expires: 2000-10-27
Abstract
Abstract A light-sensitive composition particularly suitable for making light-sensitive lithographic printing plates is described composed of a mixture of a sensitizer and a photo-crosslinkable polymer, or a mixture of a sensitizer, a compound including a light-sensitive azido group and a polymer reactive with a decomposate of azido groups to be formed upon exposure to light, and a sensitizer represented by the formula (I) ##STR1## wherein A represents a non-metallic atomic group necessary for forming a heterocyclic ring containing nitrogen; R 1 represents an alkyl group or a substituted alkyl group; R 2 represents hydrogen, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group; and Y and Z each represents an oxygen atom or a sulfur atom.
Inventors
- 👤 Yoshimasa Aotani
- 👤 Teruo Kojima
- 👤 Eiji Nakakita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:46
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/008; G03F7/0085; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/121; Y10S430/127; Y10S430/128
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A light-sensitive composition consisting essentially of a mixture of a sensitizer and a photo-crosslinkable polymer selected from polymers having a polymerization unit having bonded thereto an R--CH═CH--CO-- group, wherein R is an aryl group or a heterocyclic group, or polyesters having a --CH═CH--CO-- group in their main polymer chain, or a mixture of a sensitizer, a compound including a light-sensitive azido group and a polymer reactive with a decomposition product of azido groups to be formed upon exposure to light, said sensitizer comprising the compound represented by the formula (I) ##STR8## wherein A represents a non-metallic group necessary for forming a heterocyclic ring containing nitrogen; R 1 represents an alkyl group or a substituted alkyl group; R 2 represents hydrogen, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; and Y and Z each represents an oxygen atom or a sulfur atom.
Claim 2
Dependent Claim
148 words
A light-sensitive composition consisting essentially of a mixture of a sensitizer and a photo-crosslinkable polymer selected from polymers having a polymerization unit having bonded thereto an R--CH═CH--CO-- group, wherein R is an aryl group or a heterocyclic group, or polyesters having a --CH═CH--CO-- group in their main polymer chain, or a mixture of a sensitizer, a compound including a light-sensitive azido group and a polymer reactive with a decomposition product of azido groups to be formed upon exposure to light, said sensitizer comprising the compound represented by the formula (I) ##STR8## wherein A represents a non-metallic group necessary for forming a heterocyclic ring containing nitrogen; R 1 represents an alkyl group or a substituted alkyl group; R 2 represents hydrogen, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group; and Y and Z each represents an oxygen atom or a sulfur atom.
Claim 3
Dependent Claim
20 words
A light-sensitive composition as in claim 1 consisting essentially of a photo-crosslinkable polymer and a sensitizer represented by formula (I).
Claim 4
Dependent Claim
44 words
A light-sensitive composition as in claim 1 consisting essentially of a mixture of a compound including a light-sensitive azido group, a polymer reactive with a decomposate of azido groups to be formed upon exposure to light, and a sensitizer represented by the formula (I).
Claim 5
Dependent Claim
35 words
A light-sensitive composition as in claim 1, 2, or 3 wherein A in formula (I) represents the non-metallic group necessary for forming a heterocyclic ring selected from benzothiazole, naphthothiazole, benzoselenazole, naphthoselenazole, benzoxazole, and naphthoxazole rings.
Claim 6
Dependent Claim
29 words
A light-sensitive composition as in claim 1, 2, or 3 wherein R 1 is an alkyl group or a substituted alkyl group having from 1 to 6 carbon atoms.
Claim 7
Dependent Claim
38 words
A light-sensitive composition as in claim 1, 2, or 3 wherein R 2 is an alkyl group or a substituted alkyl group having from 1 to 16 carbon atoms or an aryl group or a substituted aryl group.
Claim 8
Dependent Claim
49 words
A light-sensitive composition as in claim 3 wherein the composition comprises from 1 to 30% by weight the compound including a light-sensitive azido group and from 99 to 70% by weight of the polymer reacted with a decomposite product of azido groups to be formed upon exposure to light.
Claim 9
Dependent Claim
69 words
A light-sensitive composition as in claim 2, wherein said photo-crosslinkable polymer is selected from the group consisting of a cinnamic acid ester of polyvinyl alcohol, starch, cellulose, hydroxyalkylcellulose or partially alkylated polyvinyl alcohol wherein said cinnamic acid is cinnamic acid, α-phenylcinnamic acid, o-chlorocinnamic acid or m-nitro cinnamic acid, cinnamoylated polystyrene, a β-(2-furyl)acrylic acid ester of polyvinyl alcohol and a polyester prepared by condensing ethyl p-phenylene diacrylate and 1,4-β-hydroxyethoxy cyclohexane.
Claim 10
Dependent Claim
19 words
A light-sensitive composition as claimed in claim 1, wherein said sensitizer represented by the general formula (I) is ##STR9##
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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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |