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US4154614A
Expired / Lapsed
US
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Photosensitive diazo composition with graft copolymer for use in printing screen
Assignee: Nippon Paint Co Ltd
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Filing: 1977-08-25
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Granted: 1979-05-15
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Expires: 1997-08-25
Abstract
Abstract The photosensitive composition contains a water-soluble graft copolymer of a partially hydrolyzed polyvinyl acetate grafted with acrylonitrile and optionally another vinylic monomer, a polymeric emulsion and a diazo compound. This composition possesses high resistance to solvent, abrasion and moisture and a favorable water-dissolubility as well.
Inventors
- 👤 Takahiro Tsunoda
- 👤 Sadayoshi Kaneda
- 👤 Shin Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021; G03F7/0212; G03F7/12
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
237 words
A photosensitive composition for the formation of a photosensitive film in a water-dissoluble printing screen, comprising the admixture of: (a) at least one water-soluble graft copolymer, the graft copolymer being prepared by the graft polymerization of acrylonitrile, or acrylonitrile with at least one vinylic monomer selected from the group consisting of acrylic esters, methacrylic ester, vinylic unsaturated nitrile and vinylic amide in a ratio of from 5 to 50 parts by weight of the vinylic monomer to 100 parts by weight of acrylonitrile, onto a partially hydrolyzed polyvinyl acetate having a degree of polymerization of from 300 to 1,200 and a degree of hydrolyzation of 80 to 90 mol percent, the proportion of acrylonitrile or acrylonitrile and vinylic monomer being from 30 to 120 parts by weight to 100 parts by weight of the partially hydrolized polyvinyl acetate; (b) at least one-film forming polymeric emulsion selected from the group consisting of vinyl acetate resinous emulsion, ethylene-vinyl acetate copolymeric resinous emulsion, methacrylate-vinyl acetate copolymeric resinous emulsion, styrene-butadiene copolymeric resious emulsion, methacrylate-butadiene copolymeric resinous emulsions, butyl rubber latex and vinyl chloride-vinyl acetate copolymeric resinous emulsion; and (c) at least one water-soluble diazonium compound having at least two diazonium groups; the proportion of the graft copolymer to the polymeric emulsions being from 30:100 to 100:30 parts by weight and the proportion of the diazonium compount to the total solids in the composition being from 1:100 to 10:100 parts by weight.
Claim 2
Dependent Claim
237 words
A photosensitive composition for the formation of a photosensitive film in a water-dissoluble printing screen, comprising the admixture of: (a) at least one water-soluble graft copolymer, the graft copolymer being prepared by the graft polymerization of acrylonitrile, or acrylonitrile with at least one vinylic monomer selected from the group consisting of acrylic esters, methacrylic ester, vinylic unsaturated nitrile and vinylic amide in a ratio of from 5 to 50 parts by weight of the vinylic monomer to 100 parts by weight of acrylonitrile, onto a partially hydrolyzed polyvinyl acetate having a degree of polymerization of from 300 to 1,200 and a degree of hydrolyzation of 80 to 90 mol percent, the proportion of acrylonitrile or acrylonitrile and vinylic monomer being from 30 to 120 parts by weight to 100 parts by weight of the partially hydrolized polyvinyl acetate; (b) at least one-film forming polymeric emulsion selected from the group consisting of vinyl acetate resinous emulsion, ethylene-vinyl acetate copolymeric resinous emulsion, methacrylate-vinyl acetate copolymeric resinous emulsion, styrene-butadiene copolymeric resious emulsion, methacrylate-butadiene copolymeric resinous emulsions, butyl rubber latex and vinyl chloride-vinyl acetate copolymeric resinous emulsion; and (c) at least one water-soluble diazonium compound having at least two diazonium groups; the proportion of the graft copolymer to the polymeric emulsions being from 30:100 to 100:30 parts by weight and the proportion of the diazonium compount to the total solids in the composition being from 1:100 to 10:100 parts by weight.
Claim 3
Dependent Claim
15 words
The photosensitive composition according to claim 1, wherein the acrylic ester is an alkyl acrylate.
Claim 4
Dependent Claim
16 words
The photosensitive composition according to claim 2, wherein the alkyl acrylate is methyl or ethyl acrylate.
Claim 5
Dependent Claim
18 words
The photosensitive composition according to claim 1, wherein the methacrylic ester is an alkyl methacrylate or glycidyl methacrylate.
Claim 6
Dependent Claim
16 words
The photosensitive composition according to claim 4, wherein the alkyl methacrylate is methyl or ethyl methacrylate.
Claim 7
Dependent Claim
14 words
The photosensitive composition according to claim 1, wherein the vinylic unsaturated nitrile is methacrylonitrile.
Claim 8
Dependent Claim
13 words
The photosensitive composition according to claim 1, wherein the vinylic amide is acrylamide.
Claim 9
Dependent Claim
23 words
The photosensitive composition according to claim 1, wherein the graft copolymer which is used is prepared by photo-polymerization in the presence of diacetyl.
Claim 10
Dependent Claim
28 words
The photosensitive composition according to claim 1, wherein the graft copolymer is used which is prepared by polymerization in the presence of ammonium persulfate by applying heat thereto.
Claim 11
Dependent Claim
22 words
The photosensitive composition according to claim 1, wherein the graft copolymer contains dry solids in an amount of 20 to 30 percent.
Claim 12
Dependent Claim
23 words
The photosensitive composition according to claim 1, wherein the polymeric emulsion contains dry solids in an amount of about 40 to 60 percent.
Claim 13
Dependent Claim
29 words
The photosensitive composition according to claim 1, wherein the acrylic or methacrylic ester is in the form of an ester with an aliphatic, straight or branched chained, alkyl group.
Claim 14
Dependent Claim
28 words
The photosensitive composition according to claim 12, wherein the aliphatic alkyl group is a member selected from the group consisting of methyl, etheyl, n-butyl, 2-ethylhexyl, n-tetradecyl and n-hexadecyl.
Claim 15
Dependent Claim
54 words
The photosensitive composition according to claim 1, wherein the diazonium compound is selected from the group consisting of a diazonium salt of bisphenol ester resin, a diazonium acrylamide resin, a tetrazo compound or a diazodiphenylamine where the dephenyl amine is unsubstituted or substituted by an alkyl group, an alkoxy group or a halogen atom.
Claim 16
Dependent Claim
29 words
The photosensitive composition according to claim 14, wherein the diphenylamine is a member or a combination of members selected from the group consisting of 4-amino-4'-methyldiphenylamine, 4-amino-4'-ethyldiphenylamine, 4-amino-4'-methoxyphenylamine and 4-amino-4'-chlorodiphenylamine.
Claim 17
Dependent Claim
62 words
The photosensitive composition according to claim 14, wherein the tetrazo compound is a member or a combination of members selected from the group consisting of diphenyl-4,4'-tetrazonium chloride zinc chloride double salt, 3,3'-dichlorodiphenyl-4,4'-tetrazonium chloride zinc chloride double salt, 3,3'-dimethoxydiphenyl-4,4'-tetrazonium chloride zinc chloride double salt, 3,3'-dimethyldiphenyl-4,4'-tetrazonium chloride zinc chloride double salt, 3,3'-diethyldiphenyl-4,4'-tetrazonium chloride zinc chloride double salt, 3,3'-dimethoxydiphenyl-4,4'-tetrazonium sulfate, 3,3'-dimethyldiphenyl-4,4'-tetrazonium sulfate and 3,3'-diethyldiphenyl-4,4'-tetrazonium sulfate.
Claim 18
Dependent Claim
12 words
The photosensitive composition according to claim 1, wherein an additive is added.
Claim 19
Dependent Claim
14 words
The photosensitive composition according to claim 17, wherein the additive is a defoaming agent.
Claim 20
Dependent Claim
28 words
The photosensitive composition according to claim 18, wherein the defoaming agent is a member selected from the group consisting of octyl alcohol, a silicone resin and tributyl phosphate.
Claim 21
Dependent Claim
37 words
The photosensitive composition according to claim 18, wherein the defoaming agent is used in an amount of 0.01 to 1.0 part by weight with respect to a mixture of the water-soluble polymeric material and the polymeric emulsion.
Claim 22
Dependent Claim
31 words
The photosensitive composition according to claim 17, wherein the additive is a water-insoluble powder which can show a transparency of 50 to 90 percent when it is present in the composition.
Claim 23
Dependent Claim
37 words
The photosensitive composition according to claim 21, wherein the water-insoluble powder is a member selected from the group consisting of an amorphous silicon dioxide and white carbon having an average particle size of 0.1 to 20 microns.
Claim 24
Dependent Claim
42 words
The photosensitive composition according to claim 2, wherein the water-insoluble powder is employed in an amount of 1.0 to 10.0 parts by weight with respect to 1,000 parts by weight of a mixture of the water-soluble polymeric material and the polymeric emulsion.
Claim 25
Dependent Claim
14 words
The photosensitive composition according to claim 17, wherein the additive is a water-soluble dyestuff.
Claim 26
Dependent Claim
54 words
The photosensitive composition according to claim 24, wherein the dyestuff is a member or a combination of members selected from the group consisting of C. I. basic violet, C. I. based Red 12, C. I. basic blue 1, C. I. acid green 36, C. I. acid blue 40 and C. I. acid red 249.
Claim 27
Dependent Claim
39 words
The photosensitive composition according to claim 24, wherein the dyestuff is employed in an amount of 0.1 to 1.0 part by weight per 1,000 parts by weight of a mixture of the water-soluble graft copolymer and the polymeric emulsion.
Claim 28
Dependent Claim
15 words
A water-dissoluble printing screen which is prepared by employing the photosensitive composition of claim 17.
Claim 29
Dependent Claim
15 words
A water-dissoluble printing screen which is prepared by employing the photosensitive composition of claim 1.
Claim 30
Dependent Claim
21 words
The printing screen according to claim 27, wherein the photosensitive composition is coated on a silk, polyester or steel wire screen.
Claim 31
Dependent Claim
22 words
The printing screen according to claim 27, wherein a coating of the photosensitive composition has a thickness of 60 to 200 microns.
References Cited (Backward Citations)
US3174860A
Cited
US3100150A
Cited
US3189451A
Cited
US3246986A
Cited
US3867147A
Cited
JPS4819099B1
Cited
US3853561A
Cited
JPS4717505U
Cited
US3915707A
Cited
US4019907A
Cited
JPS5083101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |