US4001101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of epoxy compositions
Assignee: PPG Industries Inc
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Filing: 1971-07-29
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Granted: 1977-01-04
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Expires: 1991-07-29
Abstract
Abstract Synthetic resins which are water-dispersible epoxy resins having epoxy groups, chemically-bound quaternary ammonium base salts, can be dissolved or dispersed in water to provide aqueous coating compositions. Such compositions, in which these resins are the major resinous component, can be applied by electrodeposition and deposit on the cathode to provide coatings of improved properties, including a high degree of resistance to corrosion or staining.
Inventors
- 👤 Joseph F. Bosso
- 👤 Marco Wismer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:54
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4078; C08G59/50; C08G59/52; C08G59/56; C08G59/58; C08G59/62; C08G59/64; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; C09D5/4457
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
124 words
A method of coating a conductive substrate serving as a cathode which comprises passing electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising an aqueous dispersion comprising an ungelled, water-dispersible epoxy resin having in the resin molecule: a. at least one 1,2-epoxy group, b. at least about 0.05 percent by weight of chemically-bound nitrogen, at least one percent of which is in the form of a quaternary ammonium base salt of an acid having a dissociation constant greater than about 1 × 10 - 5 , c. said water-dispersed composition containing boron in the form of boric acid, an ester of boric acid or a compound which can be cleaved to form boric acid in aqueous medium.
Claim 2
Independent Claim
124 words
A method of coating a conductive substrate serving as a cathode which comprises passing electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising an aqueous dispersion comprising an ungelled, water-dispersible epoxy resin having in the resin molecule: a. at least one 1,2-epoxy group, b. at least about 0.05 percent by weight of chemically-bound nitrogen, at least one percent of which is in the form of a quaternary ammonium base salt of an acid having a dissociation constant greater than about 1 × 10 - 5 , c. said water-dispersed composition containing boron in the form of boric acid, an ester of boric acid or a compound which can be cleaved to form boric acid in aqueous medium.
Claim 3
Dependent Claim
18 words
A method as in claim 1 wherein the acid salt is in the form of an internal zwitterion.
Claim 4
Dependent Claim
14 words
A method as in claim 1 wherein the water dispersed composition contains boric acid.
Claim 5
Dependent Claim
20 words
A method as in claim 1 wherein the resin contains about 0.05 to about 16 percent by weight of nitrogen.
Claim 6
Dependent Claim
25 words
A method as in claim 4 wherein at least about 20 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 7
Dependent Claim
25 words
A method as in claim 5 wherein at least about 50 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 8
Dependent Claim
22 words
A method as in claim 6 wherein substantially all of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 9
Dependent Claim
94 words
A method as in claim 1 of coating a conductive substrate serving as a cathode which comprises passing electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising an ungelled water-dispersible epoxy resin having in the resin molecule: a. at least one 1,2-epoxy group, b. from about 0.05 to about 16 percent by weight of chemically-bound nitrogen, said nitrogen being present in the form of quaternary nitrogen or amino nitrogen; at least about one percent of said nitrogen being in the form of a quaternary ammonium base salt.
Claim 10
Dependent Claim
25 words
A method as in claim 8 wherein at least about 20 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 11
Dependent Claim
25 words
A method as in claim 9 wherein at least about 50 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 12
Dependent Claim
22 words
A method as in claim 10 wherein substantially all of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 13
Dependent Claim
14 words
A method as in claim 8 wherein the acid is an organic carboxylic acid.
Claim 14
Dependent Claim
25 words
A method as in claim 12 wherein at least about 20 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 15
Dependent Claim
25 words
A method as in claim 13 wherein at least about 50 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 16
Dependent Claim
22 words
A method as in claim 13 wherein substantially all of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 17
Dependent Claim
12 words
A method as in claim 12 wherein the acid is lactic acid.
Claim 18
Dependent Claim
25 words
A method as in claim 16 wherein at least about 20 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 19
Dependent Claim
25 words
A method as in claim 17 wherein at least about 50 percent of the nitrogen is in the form of quaternary ammonium base salt groups.
Claim 20
Dependent Claim
22 words
A method as in claim 18 wherein substantially all of the nitrogen is in the form of quaternary ammonium base salt groups.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |