US4465761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image-forming photosensitive composition
Assignee: Hodogaya Chemical Co Ltd
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Filing: 1982-02-23
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Granted: 1984-08-14
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Expires: 2002-02-23
Abstract
Abstract An image-forming photosensitive composition comprises: (a) an organohalogen compound capable of forming a free radical by the irradiation with light, (b) a substantially colorless dye which colors when it is contacted with an acidic substance, (c) an aromatic amine and/or conjugated nitrogen-containing heterocyclic compound, (d) a binder, and (e) an aliphatic amine and/or alicyclic amine.
Inventors
- 👤 Yukio Takegawa
- 👤 Akira Tukada
- 👤 Susumu Suzuka
- 👤 Nobuyoshi Endo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
139 words
An image-forming photosensitive composition consisting essentially of: (a) 1.0 to 3.0 parts by weight of an organohalogen compound capable of forming a free radical by irradiation with light, (b) 1.0 to 5.0 parts by weight of a substantially colorless dye which colors when it is contacted with an acidic substance, said dye being selected from the group consisting of phthalide dyes, xanthene dyes, phenothiazine dyes, lactam dyes and spiropyran dyes, (c) 0.5 to 3.0 parts by weight of an aromatic amine and/or conjugated nitrogen-containing heterocyclic compound effective as a sensitizer or storage stability improving agent, (d) 5.0 to 8.0 parts by weight of a binder, and (e) 0.02 to 0.7 part by weight of an aliphatic amine, alicyclic amine and/or saturated heterocyclic amine effective to reduce the fog density on the non-image area and to improve the λ value.
Claim 2
Dependent Claim
139 words
An image-forming photosensitive composition consisting essentially of: (a) 1.0 to 3.0 parts by weight of an organohalogen compound capable of forming a free radical by irradiation with light, (b) 1.0 to 5.0 parts by weight of a substantially colorless dye which colors when it is contacted with an acidic substance, said dye being selected from the group consisting of phthalide dyes, xanthene dyes, phenothiazine dyes, lactam dyes and spiropyran dyes, (c) 0.5 to 3.0 parts by weight of an aromatic amine and/or conjugated nitrogen-containing heterocyclic compound effective as a sensitizer or storage stability improving agent, (d) 5.0 to 8.0 parts by weight of a binder, and (e) 0.02 to 0.7 part by weight of an aliphatic amine, alicyclic amine and/or saturated heterocyclic amine effective to reduce the fog density on the non-image area and to improve the λ value.
Claim 3
Dependent Claim
19 words
A composition as claimed in claim 1, in which said aliphatic amine (e) contains 1 to 22 carbon atoms.
Claim 4
Dependent Claim
65 words
A composition as claimed in claim 1, in which said aliphatic amine is selected from the group consisting of butylamine, pentylamine, hexylamine, octylamine, nonylamine, dodecylamine, tetradecylamine, octadecylamine, pentadecylamine, eicosylamine, docosylamine, didodecylamine, tributylamine, trioctylamine, ethanolamine, diethanolamine, triethanolamine, ethylenediamine, diaminobutane, diaminohexane, diaminooctane, diaminododecyl and diaminododecane; said alicyclic amine is cyclohexylamine and said saturated heterocyclic amine is selected from the group consisting of piperadine, piperazine, 4-aminopiperazine and morpholine.
Claim 5
Dependent Claim
23 words
A composition as claimed in claim 1, in which said aliphatic amine and alicyclic amine have a dissociation constant of higher than 7.5.
Claim 6
Dependent Claim
13 words
A composition as claimed in claim 1, which further contains a ferrocene compound.
Claim 7
Dependent Claim
20 words
A photosensitive coating solution which comprises ingredients (a), (b), (c), (d) and (e) defined in claim 1 and a solvent.
Claim 8
Dependent Claim
17 words
A photosensitive sheet in which the photosensitive composition defined in claim 1 is coated on a substrate.
Claim 9
Dependent Claim
20 words
A photosensitive sheet as claimed in claim 7, which has an under coat layer between said substrate and said composition.
Claim 10
Dependent Claim
16 words
A composition as claimed in claim 1 in which said dye (b) is 3,3-bis(4'-dimethylaminophenyl)-6-dimethylaminophthalide or 3-(4'-dimethylaminophenyl)-3-(1',2'-dimethylindole-3'-yl)phthalide.
Claim 11
Dependent Claim
16 words
A composition as claimed in claim 1 in which said dye (b) is a phthalide compound.
Claim 12
Dependent Claim
21 words
A composition as claimed in claim 1 in which (a) is CBR 4 , (b) is 3,3-bis-(4'-dimethylaminophenyl)-6-dimethylaminophthalide and (c) is 2-phenylindole.
Claim 13
Dependent Claim
16 words
A composition as claimed in claim 1 in which said dye (b) is a xanthene dye.
Claim 14
Dependent Claim
22 words
A composition as claimed in claim 1 in which said dye (b) is selected from the group consisting of 3-diethylamino-7-dibenzylamino-fluoran and 3-diethylamino-benzo-(c)-fluoran.
Claim 15
Dependent Claim
16 words
A composition as claimed in claim 1 in which said dye (b) is a spiropyran dye.
Claim 16
Dependent Claim
22 words
A composition as claimed in claim 1 in which said dye (b) is selected from the group consisting of 1,3,3-trimethylindolinobenzospiropyran and 7-diethylamino-3'-phenyl-2,2'-spirobi(2H-1-benzopyran).
References Cited (Backward Citations)
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US3637390A
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US3980480A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |