US3801328A
Expired / Lapsed
US
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Photopolymer printing plate and its production
Assignee: Napp Systems USA Inc
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Filing: 1972-02-11
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Granted: 1974-04-02
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Expires: 1992-02-11
Abstract
Abstract A photopolymer printing plate developable with water which comprises a support material, the adhering surface of which is abraded, and a layer of a water-soluble photosensitive resin composition comprising at least one unsaturated ethylenic compound, preferably having a boiling point above 100*C., a molecular weight below 1,500 and one to four polymerizable ethylenic groups, said ethylenic compound being polymerizable by means of actinic light in the presence of a photopolymerization initiator, a photopolymerization initiator and a partially saponified polyvinyl acetate. The plates may be used as printing plates as such or can be used to prepare relief images.
Inventors
- 👤 Y Takimoto
- 👤 Y Umeda
- 👤 T Hirayama
- 👤 T Yoshikawa
- 👤 K Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; G03F7/032; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/11; Y10S430/114; Y10S430/117
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
54 words
The photopolymerizable composition of claim 1 wherein said partially saponified polyvinyl aceTate polymer comprises one or more partially saponified polyvinyl acetate polymers having different saponification degrees, wherein the arithmetic average of the different saponification degrees, based upon the weight percent of each polymer, is within the range of about 65 to 99 mole percent.
Claim 2
Dependent Claim
65 words
The photopolymerizable composition of claim 1 further characterized by having the following ratios by weight of the respective components based upon the total weight of the composition, about 0.1 to 3.0 parts by weight of said combined unsaturated ethylenic monomers, about 0.001 to 0.15 parts by weight of said polymerization initiator, and about 0.1 to 1.0 parts by weight of said partially saponified polyvinyl acetate.
Claim 3
Dependent Claim
30 words
A photopolymerizable composition according to claim 3, further comprising about 0.01 to 0.3 percent by weight of a thermal polymerization inhibitor, based upon the weight of said unsaturated ethylenic monomers.
Claim 4
Dependent Claim
32 words
A photopolymerizable composition of claim 3 wherein said unsaturated ehtylenic monomers having a boiling point above about 100*C, a molecular weight below about 1500 and about 1 to 4 polymerizable ethylenic groups.
Claim 5
Dependent Claim
100 words
A photopolymerizable composition of claim 3 wherein said unsaturated ehtylenic monomers comprise at least one monofunctional monomer selected from the group consisting of an acrylic or methacrylic ester of a lower alkanol having at least one hydroxy group and at least one polyfunctional monomer selected from the group consisting of an acrylic or methacrylic ester of a polyethylene glycol having the structural formula (HO(CH2 CH2 O)nH) and having an ether or ester group at the end opposite from said ester moiety, n, the number of ethylene oxide units in said polyethylene glycol ester, being either one or nine to 23.
Claim 6
Dependent Claim
37 words
A photopolymerizable composition according to claim 1, wherein said photopolymerization initiator is selected from the group consisting of benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin octyl ether, benzoin vinyl ether and benzoin allyl ether.
Claim 7
Dependent Claim
25 words
A photopolymerizable composition according to claim 4, wherein said thermal polymerization inhibitor is selected from the group consisting of 2, 6 di-t-butyl-cresol, hydroquinone and P-methoxyphenol.
Claim 8
Dependent Claim
65 words
A photopolymerizable composition according to claim 3, wherein said unsaturated ethylenic compound comprises at least one mono-functional member selected from the group consisting of B-hydroxyethyl acrylate, B-hydroxyethyl methacrylate, B-hydroxypropyl acrylate, B-hydroxypropyl methacrylate, and at least one polyfunctional member selected from the group consisting of methoxpolyethylene glycol monoacrylate, methoxypolyethylene glycol monomethacrylate, polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, glycol dimethacrylate, pentaerythritol dimethacrylate, trimethacrylolethane trimethacrylate and tetramethylolmethane tetramethacrylate.
Claim 9
Dependent Claim
160 words
A water-developable photopolymerizable composition comprising the following ratios by weight of the respective components based upon the total weight of the composition: about 0.1 to 3.0 parts by weight of a mixture comprising about 1 to 50 percent by weight of a polyfunctional ethylenic unsaturated monomer, based upon the total combined weight of ethylenic unsaturated monomers, and at least one monofunctional ethylenic unsaturated monomer, said mixture of monomers being capable of forming polymer by photoinitiated polymerization in the presence of a polymerization initiator activatable by actinic light; and about 0.1 to 1.0 parts by weight of a partially saponified, water-soluble, polyvinyl acetate polymer capable of serving as a backbone polymer for the grafting of the polymer formed by said mixture of unsaturated ethylenic monomers, said partially saponified polyvinyl acetate Having an average polymerization degree of about 300 to 2,000 and an average saponification degree of about 65 to 99 mole percent and a benzoin alkylate initiator activatable by actinic light.
Claim 10
Dependent Claim
98 words
A photopolymerizable composition of claim 10 wherein said monofunctional unsaturated ethylenic monomer is selected from the group consisting of an acrylic or methacrylic ester of a lower alkanol having at least one hydroxy group and wherein said polyfunctional unsaturated ethylenic monomer is selected from the group consisting of an acrylic or methacrylic ester of polyethylene glycol having the structural formula (HO (CH2 CH2 O)nH) and having an ether or ester group at the end opposite from said ester moiety, the number, n, of ethylene oxide units in said polyethylene glycol ester being either one or nine to 23.
Claim 11
Dependent Claim
18 words
A photopolymerizable composition of claim 10 further characterized by having dyestuff antihalation material dispersed within said photopolymerizable composition.
Claim 12
Dependent Claim
153 words
A photopolymer printing plate developable with water which comprises a support material and a layer of water soluble photosensitive resin composition disposed thereon, said composition comprising the following components having the following respective ratios by weight based upon the total weight of the composition, about 0.1 to 3.0 parts by weight of a mixture comprising about 1 to 50 percent by weight of a polyfunctional ethylenically unsaturated monomer, based upon the total combined weight of ethylenically unsaturated monomers, and at least one monofunctional ethylenically unsaturated monomer, said mixture of monomers being capable of forming polymer by photoinitiated polymerization in the presence of a polymerization initiator activatable by actinic light, about 0.1 to 1.0 parts by weight of a partially saponified polyvinyl acetate having a degree of polymerization of about 300 to 2,000 and a degree of saponification of about 65 to 99 mole percent, and a benzoin alkylate initiator activatable by actinic light.
Claim 13
Dependent Claim
31 words
A photopolymer printing plate according to claim 13, further comprising about 0.01 to 0.3 percent by weight of a thermal polymerization inhibitor, based upon the weight of said unsaturated ethylenic monomers.
Claim 14
Dependent Claim
53 words
A photopolymer printing plate according to claim 13, wherein the partially saponified polyvinyl acetate comprises one or more partially saponified polyvinyl acetate polymers having different degrees of saponification and different degrees of polymerization, wherein the average degree of polymerization is 300 to 2,000 and average saponification degree is 65 to 99 mole percent.
Claim 15
Dependent Claim
20 words
A photopolymer printing plate according to claim 13, wherein said support material is a chemically or mechanically abraded metallic plate.
Claim 16
Dependent Claim
23 words
A photopolymer printing plate according to claim 16, wherein the metallic plate is a chemically or mechanically abraded aluminum or an iron plate.
Claim 17
Dependent Claim
16 words
A photopolymer printing plate according to claim 13, wherein said support material is a metallic plate.
Claim 18
Dependent Claim
20 words
A photopolymer printing plate according to claim 16, wherein the metallic plate is an aluminum, tin or galvanized steel plate.
Claim 19
Dependent Claim
15 words
A photopolymerizable composition according to claim 7 wherein said photopolymerization initiator is benzoin isopropyl ether.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |