US4238385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition for forming insulating film on electroconductive substrate for printed circuits and method therefor
Assignee: Shinto Paint Co Ltd
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Filing: 1979-08-14
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Granted: 1980-12-09
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Expires: 1999-08-14
Abstract
Abstract This invention is directed to coating compositions for electrocoating electroconductive substrates for printed circuits comprising a pigment-containing finely divided synthetic resin powder in which the resin comprises an epoxy resin, and the pigment comprises pigments with 2-10 weight parts of finely divided silica, admixed with a water-dilutable cationic resin, and to methods of utilizing the composition for forming an insulating film on an electroconductive substrate.
Inventors
- 👤 Yasuomi Okado
- 👤 Ken Nishizaki
- 👤 Akinobu Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:35
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A coating composition for forming an insulating film on an electroconductive substrate for printed circuits, composed of a pigment-containing finely divided synthetic resin powder and a water-dilutable cationic resin, characterized in that (i) the weight ratio of said finely divided powder to said cationic resin is 0.5-20 to 1, (ii) said finely divided powder is composed of 50-80 weight parts of a vehicle comprising an epoxy resin (A) having an epoxy equivalent of 400-2400 and a hardener, and 50-20 weight parts of a pigment (B), 2-10 weight parts in said pigment weight parts being finely divided silica particles having a particle diameter not larger than 100 mμ, and (iii) said water-dilutable cationic resin is produced from an addition product of an epoxy resin having an epoxy equivalent of 200-2400 and a primary or secondary amine by water-solubilizing said addition product with an acid compound.
Claim 2
Dependent Claim
144 words
A coating composition for forming an insulating film on an electroconductive substrate for printed circuits, composed of a pigment-containing finely divided synthetic resin powder and a water-dilutable cationic resin, characterized in that (i) the weight ratio of said finely divided powder to said cationic resin is 0.5-20 to 1, (ii) said finely divided powder is composed of 50-80 weight parts of a vehicle comprising an epoxy resin (A) having an epoxy equivalent of 400-2400 and a hardener, and 50-20 weight parts of a pigment (B), 2-10 weight parts in said pigment weight parts being finely divided silica particles having a particle diameter not larger than 100 mμ, and (iii) said water-dilutable cationic resin is produced from an addition product of an epoxy resin having an epoxy equivalent of 200-2400 and a primary or secondary amine by water-solubilizing said addition product with an acid compound.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |