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US4336319A
Expired / Lapsed
US
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Light-solubilizable composition
Assignee: Fujifilm Holdings Corp
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Filing: 1980-10-22
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Granted: 1982-06-22
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Expires: 2000-10-22
Abstract
Abstract A light-solubilizable composition comprising at least one o-quinonediazide compound and at least one alkali-soluble resin compatible therewith as essential components and containing fine particles dispersed therein which: (1) have an average particle size of 500 mμ or less; (2) are insoluble in an organic solvent used to coat the light-solubilizable composition and have a hydrophobic surface; (3) are transparent or white; and (4) have a refractive index of 1.3 to 1.7, in an amount of 0.1 to 50% by weight based on said light-solubilizable composition.
Inventors
- 👤 Akira Nagashima
- 👤 Nobuyuki Kita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:58
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022; G03F7/0226; H; H05; H05K; H05K3/00; H05K3/0073; H05K3/0076; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A light-solubilizable composition comprising at least one o-quinonediazide compound and at least one alkali-soluble resin compatible therewith as essential components and containing fine particles dispersed therein which: (1) have an average particle size of 500 mμ or less; (2) are insoluble in an organic solvent used to coat the light-solubilizable composition and have a hydrophobic surface; (3) are transparent or white; and (4) have a refractive index of 1.3 to 1.7, in an amount of 0.1 to 50% by weight based on said light-solubilizable composition, wherein said fine particles are aerosols of silicon dioxide where hydrophilic silanol groups on the surface thereof have been processed to render the same hydrophobic.
Claim 2
Dependent Claim
110 words
A light-solubilizable composition comprising at least one o-quinonediazide compound and at least one alkali-soluble resin compatible therewith as essential components and containing fine particles dispersed therein which: (1) have an average particle size of 500 mμ or less; (2) are insoluble in an organic solvent used to coat the light-solubilizable composition and have a hydrophobic surface; (3) are transparent or white; and (4) have a refractive index of 1.3 to 1.7, in an amount of 0.1 to 50% by weight based on said light-solubilizable composition, wherein said fine particles are aerosols of silicon dioxide where hydrophilic silanol groups on the surface thereof have been processed to render the same hydrophobic.
Claim 3
Dependent Claim
22 words
A lithographic printing plate precursor comprising an aluminum support having provided thereon a layer of light-solubilizable composition as claimed in claim 1.
Claim 4
Dependent Claim
54 words
The lithographic printing plate precursor of claim 2, wherein said o-quinonediazide compound is a compound selected from the group consisting of o-naphthoquinonediazide sulfonic acid esters of aromatic hydroxy compounds, o-naphthoquinonediazide carboxylic acid esters of aromatic hydroxy compounds, o-naphthoquinonediazide sulfonic acid amides of aromatic amino compounds and o-naphthoquinonediazide carboxylic acid amides of aromatic amino compounds.
Claim 5
Dependent Claim
40 words
The lithographic printing plate precursor of claim 3, wherein said alkali-soluble resin is selected from the group consisting of a phenol-formaldehyde resin, a cresol-formaldehyde resin, a p-tert-butylphenol-formaldehyde resin, a phenol modified xylene resin and a phenol modified xylene mesitylene resin.
Claim 6
Dependent Claim
99 words
A light-solubilizable composition of claim 1, wherein the hydrophilic silanol groups on the surface of said silicon dioxide are reacted with a reactive silane coupling agent selected from the group consisting of a trialkylchlorosilane having 1 to 4 carbon atoms in the alkyl moiety thereof, a dialkyldichlorosilane having 1 to 4 carbon atoms in the alkyl moiety thereof, vinyltrichlorosilane, vinyltriethoxysilane, vinyltris(β-methoxyethoxy)silane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, α-glycidoxypropyltrimethoxysilane, α-methacryloxypropyltrimethoxysilane, N-β-(aminoethyl)-α-aminopropyltrimethoxysilane, a titanium alkyl oxide having 1 to 5 carbon atoms in the alkyl moiety thereof, chromic acid methacrylate, toluene diisocyanate, phenyl isocyanate, an aliphatic acid having 4 to 26 carbon atoms and a rosin.
Claim 7
Dependent Claim
22 words
The lithographic printing plate precursor of claim 4, wherein said fine particles have an average particle size of 100 mμ or less.
Claim 8
Dependent Claim
22 words
The lithographic printing plate precursor of claim 4, wherein said fine particles have an average particle size of 30 mμ or less.
Claim 9
Dependent Claim
30 words
The lithographic printing plate precursor of claim 4, wherein the amount of said fine particles is 1 to 20% by weight based on the total weight of said light-solubilizable composition.
Claim 10
Dependent Claim
30 words
The lithographic printing plate precursor of claim 4, wherein the amount of o-quinonediazide compound is 10 to 50% by weight based on the total solid weight of the light-solubilizable composition.
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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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |