Patent US4413091A successfully refreshed from Google Patents.
US4413091A
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Photosensitive polymer and photosensitive material for photomechanical process
Assignee: Tokyo Ohka Kogyo Co Ltd
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Filing: 1981-12-31
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Granted: 1983-11-01
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Expires: 2001-12-31
Abstract
Abstract (1) A polyvinyl alcohol derivative represented by the formula: ##STR1## (where R 1 is a hydrogen atom or an alkyl group, R 2 is an aryl group, and k, l, m, and n denote integers of 1 or more.) (2) A photosensitive material for photomechanical process containing a polyvinyl alcohol derivative represented by the formula: ##STR2## (where R 1 is a hydrogen atom or an alkyl group, R 2 is an aryl group, and k, l, m, and n denote integers of 1 or more) and a sensitizing agent.
Inventors
- 👤 Hidenori Iwasaki
- 👤 Yukio Urata
- 👤 Shunichi Kasukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:16
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A polyvinyl alcohol derivative characterized as being a solid at ambient temperature and composed of a recurring structural unit comprising (a) from 5 to 40% by mole of a structural unit represented by the general formula ##STR4## in which R 1 is a hydrogen atom or an alkyl group; (b) from 5 to 35% by mole of a structural unit represented by the general formula ##STR5## in which R 2 is an aryl group; (c) from 1 to 45% by mole of a structural unit represented by the formula ##STR6## and (d) from 1 to 60% by mole of a structural unit represented by the formula ##STR7##
Claim 2
Dependent Claim
107 words
A polyvinyl alcohol derivative characterized as being a solid at ambient temperature and composed of a recurring structural unit comprising (a) from 5 to 40% by mole of a structural unit represented by the general formula ##STR4## in which R 1 is a hydrogen atom or an alkyl group; (b) from 5 to 35% by mole of a structural unit represented by the general formula ##STR5## in which R 2 is an aryl group; (c) from 1 to 45% by mole of a structural unit represented by the formula ##STR6## and (d) from 1 to 60% by mole of a structural unit represented by the formula ##STR7##
Claim 3
Dependent Claim
26 words
A polyvinyl alcohol derivative as set forth in claim 1, in which the degree of polymerization is in the range from about 120 to about 2,200.
Claim 4
Dependent Claim
26 words
A polyvinyl alcohol derivative as set forth in claim 1, in which the degree of polymerization is in the range from about 500 to about 1,000.
Claim 5
Dependent Claim
52 words
A polyvinyl alcohol derivative as set forth in any one of claims 1, 2 or 3, in which the N 3 -R 2 -group is a member selected from the group consisting of an o-azide phenyl group, a m-azide phenyl group, a p-azide phenyl group, a l-azide-5-naphthyl group, and hydroxy substitutes thereof.
Claim 6
Dependent Claim
45 words
A polyvinyl alcohol derivative as set forth in any one of claims 1, 2 or 3 in which the R 1 -group is selected from the group consisting of a hydrogen atom, a methyl group, a propyl group, a butyl group, and a nonyl group.
Claim 7
Dependent Claim
138 words
A process for producing a polyvinyl alcohol derivative characterized as being a solid at ambient temperature and composed of a recurring structural unit comprising (a) from 5 to 40% by mole of a structural unit represented by the general formula ##STR8## in which R 1 is a hydrogen atom or an alkyl group; (b) from 5 to 35% by mole of a structural unit represented by the general formula ##STR9## in which R 2 is an aryl group; (c) from 1 to 45% by mole of a structural unit represented by the formula ##STR10## and (d) from 1 to 60% by mole of a structural unit represented by the formula ##STR11## comprising hydrolyzing polyvinyl acetate dissolved in an organic solvent with a mineral acid and simultaneously performing acetalization with an azide aryl aldehyde and a saturated aliphatic aldehyde.
Claim 8
Dependent Claim
138 words
A process for producing a polyvinyl alcohol derivative characterized as being a solid at ambient temperature and composed of a recurring structural unit comprising (a) from 5 to 40% by mole of a structural unit represented by the general formula ##STR8## in which R 1 is a hydrogen atom or an alkyl group; (b) from 5 to 35% by mole of a structural unit represented by the general formula ##STR9## in which R 2 is an aryl group; (c) from 1 to 45% by mole of a structural unit represented by the formula ##STR10## and (d) from 1 to 60% by mole of a structural unit represented by the formula ##STR11## comprising hydrolyzing polyvinyl acetate dissolved in an organic solvent with a mineral acid and simultaneously performing acetalization with an azide aryl aldehyde and a saturated aliphatic aldehyde.
Claim 9
Dependent Claim
27 words
A process as set forth in claim 6, in which the polyvinyl acetate has a degree of polymerization in the range from about 120 to about 2,200.
Claim 10
Dependent Claim
27 words
A process as set forth in claim 6, in which the polyvinyl acetate has a degree of polymerization in the range from about 500 to about 1,000.
Claim 11
Dependent Claim
21 words
A process as set forth in any one of claims 6, 7 or 8, in which the organic solvent is methanol.
Claim 12
Dependent Claim
33 words
A process as set forth in any one of claims 6, 7 or 8, in which the mineral acid is selected from the group consisting of hydrochloric acid, sulfuric acid, and phosphoric acid.
Claim 13
Dependent Claim
47 words
A process as set forth in any one of claims 6, 7 or 8, in which the azide aryl aldehyde is selected from the group consisting of an o-azide benzaldehyde group, a m-azide benzaldehyde group, a p-azide benzaldehyde group, a l-azide-5-naphthyl aldehyde group, and hydroxy substitutes thereof.
Claim 14
Dependent Claim
40 words
A process as set forth in any one of claims 6, 7 or 8, in which the azide aryl aldehyde is used in an amount from 0.2 to 0.6 mol% for 1 mol of vinyl acetate monomer constituting polyvinyl acetate.
Claim 15
Dependent Claim
36 words
A process as set forth in any one of claims 6, 7 or 8, in which the saturated aliphatic aldehyde is selected from the group consisting of formaldehyde, acetaldehyde, propyl aldehyde, butyl aldehyde, and nonyl aldehyde.
Claim 16
Dependent Claim
40 words
A process as set forth in any one of claims 6, 7 or 8, in which the saturated aliphatic aldehyde is used in an amount from 0.05 to 0.4 mol% for 1 mol of vinyl acetate monomer constituting polyvinyl acetate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |