US4045231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive resin composition for flexographic printing plates
Assignee: Tokyo Ohka Kogyo Co Ltd
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Filing: 1976-02-18
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Granted: 1977-08-30
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Expires: 1996-02-18
Abstract
Abstract A photosensitive resin composition for flexographic printing plates comprising styrene-butadiene block copolymer containing 35 - 50% by weight of styrene, at least one liquid prepolymer having a molecular weight of 1,000 - 5,000 selected from the group consisting of polybutadiene and butadiene-styrene copolymer, at least one photopolymerizable monomer containing at least one vinyl group, such as tetraethyleneglycol diacrylate, a photopolymerization initiator such as benzophenone, and a thermopolymerization inhibitor optionally added. This photosensitive resin composition affords relief images suitable for use in flexographic printing.
Inventors
- 👤 Hiroyuki Toda
- 👤 Eiichi Otomegawa
- 👤 Toshimi Aoyama
- 👤 Hisashi Nakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/118
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
56 words
A photosensitive resin composition for flexographic printing plates comprising (a) styrene-butadiene block copolymer containing 35- 50% by weight of styrene, (b) at least one liquid prepolymer having a molecular weight of 1,000- 5,000 selected from the group consisting of polybutadiene and butadiene-styrene copolymer, and (c) at least one photopolymerizable monomer containing one or more vinyl groups.
Claim 2
Dependent Claim
56 words
A photosensitive resin composition for flexographic printing plates comprising (a) styrene-butadiene block copolymer containing 35- 50% by weight of styrene, (b) at least one liquid prepolymer having a molecular weight of 1,000- 5,000 selected from the group consisting of polybutadiene and butadiene-styrene copolymer, and (c) at least one photopolymerizable monomer containing one or more vinyl groups.
Claim 3
Dependent Claim
38 words
The photosensitive resin composition of claim 1 wherein said liquid prepolymer as the component (b) is contained in amount of 1-200 parts by weight per 100 parts by weight of said styrene-butadiene block copolymer as the component (a).
Claim 4
Dependent Claim
51 words
The photosensitive resin composition of claim 1 wherein said photopolymerizable monomer as the component (c) is contained in an amount of 3- 30 parts by weight per 100 parts by weight of a total of said styrene-butadiene block copolymer as the component (a) and said liquid prepolymer as the component (b).
Claim 5
Dependent Claim
44 words
The photosensitive resin composition of claim 1 wherein said photopolymerizable monomer as the component (c) is a polyvinyl ester obtained by reacting a diol or triol having 2- 10 carbon atoms with a monoethylenically unsaturated monocarboxylic or polycarboxylic acid having 3- 5 carbon atoms.
Claim 6
Dependent Claim
34 words
The photosensitive resin composition of claim 1 wherein a thermopoloymerization inhibitor is contained in an amountof 0.05- 1 part by weight per 100 parts by weight of said photopolymerizable monomer as the component (c).
Claim 7
Dependent Claim
17 words
The photosensitive resin composition of claim 1 wherein said composition is shaped into a film or plate.
Claim 8
Dependent Claim
12 words
The photosensitive resin composition of claim 1 which contains a photopolymerization initiator.
Claim 9
Dependent Claim
39 words
The photosensitive resin composition of claim 7 wherein said photopolymerization initiator as the component (d) is contained in an amount of 0.1- 30 parts by weight per 100 parts by weight of said photopolymerizable monomer as the component (c).
Claim 10
Dependent Claim
36 words
The photosensitive resin composition of claim 1 in which said styrene-butadiene block copolymer is a soluble, thermoplastic composed of at least two thermoplastic non-elastomeric polystyrene blocks and an elastomeric polybutadiene block interposed between the polystyrene blocks.
Claim 11
Dependent Claim
81 words
The photosensitive resin composition of claim 9 in which said liquid prepolymer (b) is a polybutadiene which contains in the molecule 1,2 - bonds of at least 90 mol% having the formula ##STR3## wherein n is a positive integer, or polybutadieneor styrene butadiene copolymer which contains in the molecule 1,4-bonds of at least 80 mol % and is shown by the general formula: ##STR4## wherein X stands for --CH═CH 2 or --C 6 H 5 and m for a positive integer.
References Cited (Backward Citations)
US3676386A
Cited
US3925076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |