US3984299A
Expired / Lapsed
US
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Process for electrodepositing cationic compositions
Assignee: PPG Industries Inc
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Filing: 1975-02-05
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Granted: 1976-10-05
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Expires: 1995-02-05
Abstract
Abstract It has been found that aqueous coating compositions comprising a blocked organic polyisocyanate, an amine adduct of an epoxy group-containing resin, and optionally a catalyst for urethane formation can be electrodeposited. These compositions deposit on the cathode to provide coatings having excellent properties.
Inventors
- 👤 Robert D. Jerabek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:58
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/643; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0088; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C09D5/4438; C09D5/4453
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
In a method of electrocoating an electrically-conductive surface serving as a cathode which comprises passing electric current between said cathode and an anode in contact with an aqueous electrodepositable composition, the improvement wherein said electrodepositable composition comprises: A. a hydroxyl-containing adduct which is the reaction product of a primary or secondary amine and a polyepoxide, said adduct being solubilized with acid to provide cationic groups in said adduct, B. a blocked organic polyisocyanate stable at room temperature in the presence of hydroxyl or amino groups but reactive with hydroxyl or amino groups at elevated temperatures.
Claim 2
Dependent Claim
95 words
In a method of electrocoating an electrically-conductive surface serving as a cathode which comprises passing electric current between said cathode and an anode in contact with an aqueous electrodepositable composition, the improvement wherein said electrodepositable composition comprises: A. a hydroxyl-containing adduct which is the reaction product of a primary or secondary amine and a polyepoxide, said adduct being solubilized with acid to provide cationic groups in said adduct, B. a blocked organic polyisocyanate stable at room temperature in the presence of hydroxyl or amino groups but reactive with hydroxyl or amino groups at elevated temperatures.
Claim 3
Dependent Claim
43 words
A method according to claim 1 wherein (B) is the reaction product of an organic polyisocyanate and a compound selected from the group consisting of an aliphatic alkyl monoalcohol, a cycloaliphatic alkyl monoalcohol, an aromatic alkyl monoalcohol, a ketoxime, and a tertiary hydroxylamine.
Claim 4
Dependent Claim
21 words
A method according to claim 1 wherein B is the reaction product of an organic polyisocyanate and an aliphatic alkyl monoalcohol.
Claim 5
Dependent Claim
27 words
A method according to claim 1 wherein (A) and (B) are present in a ratio of about 0.5 to about 2.0 blocked isocyanate groups per hydroxyl group.
Claim 6
Dependent Claim
25 words
A method according to claim 1 wherein (A) is an acid-solubilized adduct of a primary or secondary amine and a polyglycidyl ether of a polyphenol.
Claim 7
Dependent Claim
45 words
A method according to claim 5 wherein (B) is the reaction product of an organic polyisocyanate and a compound selected from the group consisting of an aliphatic alkyl monoalcohol, a cycloaliphatic alkyl monoalcohol, an aromatic alkyl monoalcohol, a phenol, a ketoxime, and a tertiary hydroxylamine.
Claim 8
Dependent Claim
27 words
A method according to claim 5 wherein (A) and (B) are present in a ratio of about 0.5 to about 2.0 blocked isocyanate groups per hydroxyl group.
Claim 9
Dependent Claim
23 words
A method according to claim 1 wherein (A) is an acid-solubilized adduct of a secondary amine and a polyglycidyl ether of Bisphenol A.
Claim 10
Dependent Claim
45 words
A method according to claim 8 wherein (B) is the reaction product of an organic polyisocyanate and a compound selected from the group consisting of an aliphatic alkyl monoalcohol, a cycloaliphatic alkyl monoalcohol, an aromatic alkyl monoalcohol, a phenol, a ketoxime, and a tertiary hydroxylamine.
Claim 11
Dependent Claim
27 words
A method according to claim 1 wherein (A) is an acid-solubilized adduct of a secondary amine and a carboxylic acid-modified, epoxy group-containing polyglycidyl ether of a polyphenol.
Claim 12
Dependent Claim
9 words
An article electrocoated by the method of 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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |