US3960685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive resin composition containing pullulan or esters thereof
Assignee: Hayashibara Seibutsu Kagaku Kenkyujo KK
•
Filing: 1974-11-05
•
Granted: 1976-06-01
•
Expires: 1994-11-05
Abstract
Abstract A photosensitive resin composition comprising pullulan, which is a polymer having repetition units of maltotriose and is represented by the formula, ##SPC1## Wherein n is an integer of 20 to 8,000, and/or a derivative thereof, a photopolymerizable monomer, a photosensitizer and a thermal polymerization inhibitor, or comprising the said pullulan, which has been incorporated with a photoactive reaction group to provide photosensitivity, and a photosensitizer, is a novel composition low in viscosity which can be prepared by use of water and can be formed into a photosensitive plate capable of being developed with water to give a clear image. Since the pullulan in said composition has no toxicity, the waste water formed at the time of development of said photosensitive plate can be treated with ease.
Inventors
- 👤 Takezo Sano
- 👤 Yukikazu Uemura
- 👤 Akihiro Furuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:57
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/0325
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
83 words
A photosensitive resin composition comprising 30 to 90 parts by weight of at least one member selected from the group consisting of pullulan, an acetylation product of pullulan, an ester of pullulan with an unsaturated organic acid and a cinnamoylated ester of pullulan, 70 to 10 parts by weight of a photopolymerizable monomer, 0.5 to 5 parts by weight of a photosensitizer and 0.1 to 1 part by weight of a thermal polymerization inhibitor per 100 parts by weight of said polymerizable monomer.
Claim 2
Dependent Claim
83 words
A photosensitive resin composition comprising 30 to 90 parts by weight of at least one member selected from the group consisting of pullulan, an acetylation product of pullulan, an ester of pullulan with an unsaturated organic acid and a cinnamoylated ester of pullulan, 70 to 10 parts by weight of a photopolymerizable monomer, 0.5 to 5 parts by weight of a photosensitizer and 0.1 to 1 part by weight of a thermal polymerization inhibitor per 100 parts by weight of said polymerizable monomer.
Claim 3
Dependent Claim
17 words
A composition according to claim 1, wherein the molecular weight of the pullulan is 10,000 to 4,000,000.
Claim 4
Dependent Claim
15 words
A composition according to claim 1, wherein said member is an acetylation product of pullulan.
Claim 5
Dependent Claim
18 words
A composition according to claim 1, wherein the substitution degree of the acetylation product is less than 1.2.
Claim 6
Dependent Claim
16 words
A composition according to claim 4 which additionally contains ethylene glycol dimethacrylate or triethylene glycol dimethacrylate.
Claim 7
Dependent Claim
20 words
A composition according to claim 4 which additionally contains vinyl acetate, methyl methacrylate, glycidyl methacrylate, ethyl acrylate or cyclohexyl acrylate.
Claim 8
Dependent Claim
19 words
A composition according to claim 1, wherein said member is an ester of pullulan with an unsaturated organic acid.
Claim 9
Dependent Claim
27 words
A composition according to claim 7, wherein the unsaturated organic acid is acrylic acid, methacrylic acid, fumaric acid, maleic acid, crotonic acid, itaconic acid or citraconic acid.
Claim 10
Dependent Claim
20 words
A composition according to claim 1, wherein the photopolymerizable monomer is acrylamide, acrylic acid, methacrylic acid, 2-hydroxyethyl methacrylate or n-vinylpyrrolidone.
Claim 11
Dependent Claim
15 words
A composition according to claim 1, wherein said photosensitizer is uranyl nitrate or sodium anthraguinone-α-sulfonate.
Claim 12
Dependent Claim
17 words
A composition according to claim 1, wherein said photosensitizer is an α-carbonyl alcohol or an α-carbonyl ether.
Claim 13
Dependent Claim
14 words
A composition according to claim 11, wherein the α-carbonyl alcohol is benzoin or α-methylbenzoin.
Claim 14
Dependent Claim
14 words
A composition according to claim 11, wherein the α-carbonyl ether is benzoin methyl ether.
Claim 15
Dependent Claim
18 words
A composition according to claim 1, wherein a crosslinkable monomer is used in place of the photopolymerizable monomer.
Claim 16
Dependent Claim
14 words
A composition according to claim 14, wherein the crosslinkable monomer is nanoethylene glycol dimethacrylate.
Claim 17
Dependent Claim
16 words
A composition according to claim 1, wherein the thermal polymerization inhibitor is hydroquinone, methylhydroquinone or p-methoxyphenol.
Claim 18
Dependent Claim
16 words
A composition according to claim 1, wherein said photosensitizer is 5-nitroacenaphthene, 3-methyl-1,3-diaza-1,9-benzanthrone or a Michler's ketone.
Claim 19
Dependent Claim
23 words
A composition according to claim 1, wherein the substitution degree of cinnamoyl group in the cinnamoyl ester of pullulan is 0.8 or less.
Claim 20
Dependent Claim
23 words
A composition according to claim 1, wherein the substitution degree of cinnamoyl group in the cinnamoyl ester of pullulan is 1 or more.
Claim 21
Dependent Claim
12 words
A composition according to claim 1, wherein an organic solvent is used.
Claim 22
Dependent Claim
18 words
A composition according to claim 20, wherein the organic solvent is dimethylformamide, acetone, chloroform or an acetone-water mixture.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |