Patent US3840390A successfully refreshed from Google Patents.
US3840390A
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US
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Photocuring compositions cured by light irradiation
Assignee: Kansai Paint Co Ltd
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Filing: 1972-04-11
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Granted: 1974-10-08
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Expires: 1992-04-11
Abstract
Abstract The present invention relates to a photocuring composition and to methods of applying said composition to surfaces by light irradiation, which photocuring composition is prepared by blending a photosensitizer into a vinyl monomer solution of an acrylic resin containing unsaturated groups produced by the halfesterification of an acrylic resin having acid anhydride groups and a polymerizable unsaturated monomer having hydroxyl group or produced by the half-esterification of an acrylic resin having hydroxyl groups and a polymerizable unsaturated monomer having acid anhydride group.
Inventors
- 👤 K Murata
- 👤 H Kozu
- 👤 M Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/033; C; C08; C08F; C08F290/00; C08F290/02; C08F290/04; C08F290/046; G03F7/008; G03F7/028; G03F7/029; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
IN A METHOD OF PHOTOCURING A PHOTOCURING COATING COMPOSITION WHICH COMPRISES APPLYING A PHOTOCURING COATING COMPOSITION TO THE SURFACE OF THE OBJECT TO BE COATED AND IRRADIATING THE THUS-COATED SURFACE WITH LIGHT TO EFFECT THE CURING OF THE COMPOSITION, THE IMPROVEMENT WHEREBY THE PHOTOCURING COATING COMPOSITION CONSISTS ESSENTIALLY OF FROM 0.05 TO 5.0 PERCENT BY WEIGHT OF A PHOTOSENSITIZER BLENDED INTO A VINYL MONOMER SOLUTION OF AN ACRYLIC RESIN CONTAINING UNSATURATED GROUPS, SAID VINYL MONOMER SOLUTION OF ACRYLIC RESIN BEING OBTAINED BY POLYMERIZING A POLYMERIZABLE UNSATURATED MONOMER HAVING AN ACID ANHYDRIDE GROUP WITH A LIQUID VINYL MONOMER OR MIXTURE THEREOF WITHOUT USING A NON-POLYMERIZABLE ORGANIC SOLVENT IN THE REACTION SYSTEM UNTIL ABOUT 30 TO 70 PERCENT OF THE MONOMERS ARE POLYMERIZED, THEN REACTING THE THUS-OBTAINED POLYMER WITH A POLYMERIZABLE UNSATURATED VINYL MONOMER HAVING A HYDROXYL GROUP IN SUCH AMOUNTS SO AS TO PRODUCE A HALF ESTER THEREOF WITHOUT USING A NON-POLYMERIZABLE ORGANIC SOLVENT IN THE REACTION SYSTEM.
Claim 2
Dependent Claim
157 words
IN A METHOD OF PHOTOCURING A PHOTOCURING COATING COMPOSITION WHICH COMPRISES APPLYING A PHOTOCURING COATING COMPOSITION TO THE SURFACE OF THE OBJECT TO BE COATED AND IRRADIATING THE THUS-COATED SURFACE WITH LIGHT TO EFFECT THE CURING OF THE COMPOSITION, THE IMPROVEMENT WHEREBY THE PHOTOCURING COATING COMPOSITION CONSISTS ESSENTIALLY OF FROM 0.05 TO 5.0 PERCENT BY WEIGHT OF A PHOTOSENSITIZER BLENDED INTO A VINYL MONOMER SOLUTION OF AN ACRYLIC RESIN CONTAINING UNSATURATED GROUPS, SAID VINYL MONOMER SOLUTION OF ACRYLIC RESIN BEING OBTAINED BY POLYMERIZING A POLYMERIZABLE UNSATURATED MONOMER HAVING AN ACID ANHYDRIDE GROUP WITH A LIQUID VINYL MONOMER OR MIXTURE THEREOF WITHOUT USING A NON-POLYMERIZABLE ORGANIC SOLVENT IN THE REACTION SYSTEM UNTIL ABOUT 30 TO 70 PERCENT OF THE MONOMERS ARE POLYMERIZED, THEN REACTING THE THUS-OBTAINED POLYMER WITH A POLYMERIZABLE UNSATURATED VINYL MONOMER HAVING A HYDROXYL GROUP IN SUCH AMOUNTS SO AS TO PRODUCE A HALF ESTER THEREOF WITHOUT USING A NON-POLYMERIZABLE ORGANIC SOLVENT IN THE REACTION SYSTEM.
Claim 3
Dependent Claim
157 words
In a method of photocuring a photocuring coating composition which comprises applying a photocuring coating composition to the surface of the object to be coated and irradiating the thus-coated surface with light to effect the curing of the composition, the improvement whereby the photocuring coating composition consists essentially of from 0.05 to 5.0 percent by weight of a photosensitizer blended into a vinyl monomer solution of an acrylic resin containing unsaturated groups, said vinyl monomer solution of acrylic resin being obtained by polymerizing a polymerizable unsaturated monomer having a hydroxyl group with a liquid vinyl monomer or mixture thereof without using a non-polymerizable organic solvent in the reaction system until about 30 to 70 percent of the monomers are polymerized, then reacting the thus-obtained polymer with a polymerizable unsaturated vinyl monomer having an acid anhydride group in such amounts so as to produce a half ester thereof without using a non-polymerizable organic solvent in the reaction system.
Claim 4
Dependent Claim
157 words
In a method of photocuring a photocuring coating composition which comprises applying a photocuring coating composition to the surface of the object to be coated and irradiating the thus-coated surface with light to effect the curing of the composition, the improvement whereby the photocuring coating composition consists essentially of from 0.05 to 5.0 percent by weight of a photosensitizer blended into a vinyl monomer solution of an acrylic resin containing unsaturated groups, said vinyl monomer solution of acrylic resin being obtained by polymerizing a polymerizable unsaturated monomer having a hydroxyl group with a liquid vinyl monomer or mixture thereof without using a non-polymerizable organic solvent in the reaction system until about 30 to 70 percent of the monomers are polymerized, then reacting the thus-obtained polymer with a polymerizable unsaturated vinyl monomer having an acid anhydride group in such amounts so as to produce a half ester thereof without using a non-polymerizable organic solvent in the reaction system.
Claim 5
Dependent Claim
50 words
The improvement according to claim 2 in which said photosensitizer is at least one compound selected from the group consisting of cinnamic acid compounds, azo compounds, diazo compounds, thiuram compounds, halogen compounds, peroxides, azide compounds, carbonyl compoundS, organic coloring matter compounds, organic phosphorus compounds and nitrates of uranium or cerium.
Claim 6
Dependent Claim
37 words
The improvement according to claim 2 in which said polymerizable unsaturated monomer having a hydroxyl group is at least one compound selected from the group consisting of hydroxyalkyl methacrylate esters, hydroxyalkyl acrylate esters and allylic unsaturated alcohols.
Claim 7
Dependent Claim
35 words
The improvement according to claim 2 in which said polymerizable unsaturated monomer having an acid anhydride group is at least one compound selected from the group consisting of maleic anhydride, tetrahydrophthalic anhydride and endo-cis-bicyclo-(2,2,1)-5-heptene-2,3-dicarboxylic anhydride.
Claim 8
Dependent Claim
25 words
The improvement according to claim 2 in which a photocuring accelerator which is selected from the group consisting of anthraquinone, 2-nitrofluorene, and 5-nitroacenaphthene is added.
Claim 9
Dependent Claim
21 words
The improvement according to claim 6, wherein the photocuring accelerator is present in an amount of 0.1 to 1.0 wt. percent.
Claim 10
Dependent Claim
36 words
The improvement according to claim 2 in which said liquid vinyl monomer is at least one compound selected from the group consisting of acrylic acid, alkyl acrylate esters, methacrylic acid, alkyl methacrylate esters, styrene and vinyltoluene.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |