US4040924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous cationic electrodeposition of epoxy resins having quaternary groups carrying blocked NCO
Assignee: PPG Industries Inc
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Filing: 1976-11-01
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Granted: 1977-08-09
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Expires: 1996-11-01
Abstract
Abstract Resinous vehicles suitable for use in cationic electrodeposition are disclosed. The vehicles comprise the reaction product of any epoxy-containing organic material and an organic tertiary amine acid salt or sulfide-acid mixture; the amine and the sulfide containing blocked isocyanate groups capable of unblocking at elevated temperatures to cure the resinous vehicle.
Inventors
- 👤 James E. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4453; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/28; C08G18/40; C08G18/58; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8041; C08G18/8061; C08G18/8064; C08G18/807; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A method of electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode and an anode and an aqueous electrodepositable composition wherein the electrodepositable composition comprises an aqueous dispersion of: A. a hydroxyl group-containing resinous vehicle comprising the acidified reaction product of: 1. an organic polyepoxide, 2. an organic tertiary amine which contains blocked isocyanate groups or organic thioether which contains blocked isocyanate groups, said blocked isocyanate groups capable of unblocking at elevated temperature to crosslink said resinous vehicle.
Claim 2
Independent Claim
85 words
A method of electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode and an anode and an aqueous electrodepositable composition wherein the electrodepositable composition comprises an aqueous dispersion of: A. a hydroxyl group-containing resinous vehicle comprising the acidified reaction product of: 1. an organic polyepoxide, 2. an organic tertiary amine which contains blocked isocyanate groups or organic thioether which contains blocked isocyanate groups, said blocked isocyanate groups capable of unblocking at elevated temperature to crosslink said resinous vehicle.
Claim 3
Dependent Claim
19 words
The method of electrocoating of claim 1 in which the organic polyepoxide is a polyglycidyl ether of a polyphenol.
Claim 4
Dependent Claim
14 words
The method of electrocoating of claim 2 in which the polyphenol is Bisphenol A.
Claim 5
Dependent Claim
23 words
The method of electrocoating of claim 1 in which (2) is the adduct of an organic hydroxyl-containing tertiary amine and a half-capped diisocyanate.
Claim 6
Dependent Claim
22 words
The method of electrocoating of claim 1 in which (2) is the adduct of an organic, hydroxyl-containing thioether and a half-capped diisocyanate.
Claim 7
Dependent Claim
27 words
The method of electrocoating of claim 1 in which the isocyanate in (2) is blocked with a member selected from the class consisting of phenol and oximes.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |