US3896017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of thermosetting coating at the cathode
Assignee: DeSoto Inc
•
Filing: 1973-03-01
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Granted: 1975-07-22
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Expires: 1993-03-01
Abstract
Abstract Thermosetting coatings exhibiting a superior cure on baking are deposited at the cathode by combining a water dispersible salt of an acid with a polyamine resin with a water dispersible heathardening phenolic resin. The polyamine resin is preferably hydroxy functional and it is precondensed with the phenolic resin to insure codeposition at the cathode. The use of a phenolic resin avoids the usual retardation of an N-methylol caused by the amine groups of the polyamine resin.
Inventors
- 👤 Kazys Sekmakas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:14
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A METHOD OF ELECTRODEPOSITING A THERMOSETTING COATING AT THE CATHODE OF A UNIDIRECTIONAL ELECTRICAL SYSTEM COMPRISING PASSING A UNIDIRECTIONAL ELECTRICAL CURRENT THROUGH AN AQUEOUS ELECTROCOATING BATH COMPRISING WATER HAVING DISPERSED THEREIN A WATER DISPERSIBLE SALT OF AN CID WITH A HYDROXY FUNCTIONAL POLYAMINE RESIN, SAID POLYAMINE RESIN BEING THE REACTION PRODUCT OF A SOLVENT-SOLUBLE EPOXY RESIN ADAVANCED BY REAACTION WITH UP TO ABOUT 10% BY WEIGHT OF DIISOCYANATE AND REACTED WITH MONOSECONDARY AMINE TO BE SUBSTANTIALLY DEVOID OF EPOXY FUNCTIONALITY, SAID POLYALINE RESIN BEING PRECONDENSED WITH FROM 2% TO 60%, BASED ON THE TOTAL WEIGHT OF RESIN, OF A WATER DISPERSIBLE HEAT-HARDENING PHENOLIC RESIN TO CAUSE THE CODEPOSITION OF SAID POLYAMINE RESIN AND SAID PHENOLIC RESIN IN THE FORM OF A FILM OF COATING AT THE CATHODE, REMOVING THE COATED CATHODE FROM SAID BATH AND THEN BAKING THE COATED CATHODE TO CURE SAID POLYAMINE RESIN BY REACTION THEREOF WITH SAID PHNOLIC RESIN.
Claim 2
Independent Claim
152 words
A METHOD OF ELECTRODEPOSITING A THERMOSETTING COATING AT THE CATHODE OF A UNIDIRECTIONAL ELECTRICAL SYSTEM COMPRISING PASSING A UNIDIRECTIONAL ELECTRICAL CURRENT THROUGH AN AQUEOUS ELECTROCOATING BATH COMPRISING WATER HAVING DISPERSED THEREIN A WATER DISPERSIBLE SALT OF AN CID WITH A HYDROXY FUNCTIONAL POLYAMINE RESIN, SAID POLYAMINE RESIN BEING THE REACTION PRODUCT OF A SOLVENT-SOLUBLE EPOXY RESIN ADAVANCED BY REAACTION WITH UP TO ABOUT 10% BY WEIGHT OF DIISOCYANATE AND REACTED WITH MONOSECONDARY AMINE TO BE SUBSTANTIALLY DEVOID OF EPOXY FUNCTIONALITY, SAID POLYALINE RESIN BEING PRECONDENSED WITH FROM 2% TO 60%, BASED ON THE TOTAL WEIGHT OF RESIN, OF A WATER DISPERSIBLE HEAT-HARDENING PHENOLIC RESIN TO CAUSE THE CODEPOSITION OF SAID POLYAMINE RESIN AND SAID PHENOLIC RESIN IN THE FORM OF A FILM OF COATING AT THE CATHODE, REMOVING THE COATED CATHODE FROM SAID BATH AND THEN BAKING THE COATED CATHODE TO CURE SAID POLYAMINE RESIN BY REACTION THEREOF WITH SAID PHNOLIC RESIN.
Claim 3
Dependent Claim
29 words
A method as recited in claim 1 in which said phenolic resin is present in an amount of from 5% to 50%, based on the total weight of resin.
Claim 4
Dependent Claim
17 words
A method as recited in claim 1 in which said phenolic resin is an ''''A'''' stage resol.
Claim 5
Dependent Claim
21 words
A method as recited in claim 1 in which said aqueous electrocoating bath has a pH in the range of 6-2.
Claim 6
Dependent Claim
32 words
A method as recited in claim 4 in which said bath includes water miscible organic solvent in an amount of from 10% - 150%, based on the weight of the dispersed resins.
Claim 7
Dependent Claim
21 words
A method as recited in claim 5 in which said bath has a resin solids content in the range of 2-20%.
References Cited (Backward Citations)
US3640926A
Cited
US3729435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |