US4845012A
Expired / Lapsed
US
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Photocurable electrodeposition coating compositions for printed circuit photoresist films
Assignee: Kansai Paint Co Ltd
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Filing: 1987-05-05
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Granted: 1989-07-04
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Expires: 2007-05-05
Abstract
Abstract A photocurable electrodeposition coating composition for printed circuit photoresist film comprising (a) a water-soluble or water-dispersible polymerizable unsaturated resin having an acid value of 20 to 300, an unsaturation equivalent of 150 to 3,000 and a number-average molecular weight of not less than 300, (b) a water-insoluble photopolymerization initiator, and (c) a chelating agent.
Inventors
- 👤 Kenji Seko
- 👤 Toshio Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16; G03F7/164; G03F7/004; Y; Y10; Y10S; Y10S430/00; Y10S430/138
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A photocurable electrodeposition coating composition for a printed circuit photoresist film comprising (a) a water-soluble or water-dispersible polymerizable unsaturated resin formed by adding a glycidyl group-containing unsaturated compound to an acrylic resin with a high acid value, and having an acid value of 20 to 300, an unsaturation equivalent of 150 to 3,000 and a number-average molecular weight of not less than 300 and a glass transition temperature of 0° to 100° C., (b) a water-soluble photopolymerization initiator, and (c) a chelating agent.
Claim 2
Dependent Claim
83 words
A photocurable electrodeposition coating composition for a printed circuit photoresist film comprising (a) a water-soluble or water-dispersible polymerizable unsaturated resin formed by adding a glycidyl group-containing unsaturated compound to an acrylic resin with a high acid value, and having an acid value of 20 to 300, an unsaturation equivalent of 150 to 3,000 and a number-average molecular weight of not less than 300 and a glass transition temperature of 0° to 100° C., (b) a water-soluble photopolymerization initiator, and (c) a chelating agent.
Claim 3
Dependent Claim
71 words
The photocurable electrodeposition coating composition of claim 1 wherein the polymerizable unsaturated resin is a resin formed by adding a glycidyl group-containing unsaturated compound to an acrylic resin with a high acid value of 40 to 650, and having an acid value of 40 to 100, an unsaturation equivalent of 250 to 1,000, a number-average molecular weight of 1,000 to 30,000 and a glass transition temperature of 20° to 70° C.
Claim 4
Dependent Claim
28 words
The photocurable electrodeposition coating composition of claim 1 wherein the water-insoluble photo polymerization initiator is selected from benzoin ethyl ether, α-hydroxyisobutylphenone, 1-hydroxy-l-cyclohexylacetophenone, 2,2-dimethoxy-2-phenylacetophenone, methylbenzoyl formate, 2-methyl-1-[4-(methylthio)phenyl]-2morpholinopropene and thioxanthone.
Claim 5
Dependent Claim
33 words
The electrodeposition coating composition of claim 1 wherein the water-insoluble photopolymerization initiator is contained in an amount of 0.1 to 10 parts by weight per 100 by weight of the polymerizable unsaturated resin.
Claim 6
Dependent Claim
31 words
The electrodeposition coating composition of claim 1 wherein the chelating agent is selected from β-diketones, acetoacetate esters, malonate esters, and ketones, esters and aldehydes having a hydroxyl group in the β-position.
Claim 7
Dependent Claim
16 words
The electrodeposition coating composition of claim 1 wherein the chelating agent is β-diketones or acetoacetate esters.
Claim 8
Dependent Claim
19 words
The electrodeposition coating composition of claim 1 wherein the chelating agent (c) is acetylacetone, methyl acetoacetate or ethyl acetoacetate.
Claim 9
Dependent Claim
33 words
The electrodeposition coating composition of claim 1 wherein the chelating agent is contained in an amount of 1 to 300 parts by weight per 100 parts by weight of the polymerizable unsaturated resin.
Claim 10
Dependent Claim
13 words
The electrodeposition coating bath composed of the electrodeposition coating composition in claim 1.
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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |