US4432850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ungelled polyepoxide-polyoxyalkylenepolyamine resins, aqueous dispersions thereof, and their use in cationic electrodeposition
Assignee: PPG Industries Ohio Inc
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Filing: 1982-09-20
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Granted: 1984-02-21
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Expires: 2002-09-20
Abstract
Abstract Ungelled resins, aqueous dispersions of cationic resins, coating compositions, and electrodeposition using the resinous coating compositions are disclosed. The resins are formed from reacting polyepoxides with polyoxyalkylenepolyamines. The aqueous dispersons are prepared by at least partially neutralizing the resins to provide cationic groups and dispersing the cationic resins in aqueous medium. When added to cationic electrodepositable coating compositions, such as high throwpower compositions, the ungelled cationic resins provide better appearing, more flexible and water-resistant electrodeposited coatings.
Inventors
- 👤 Thomas C. Moriarity
- 👤 William J. Geiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:15
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C08; C08L; C08L63/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A method of electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode and an anode immersed in an aqueous resinous dispersion, comprising passing electric current between the anode and the cathode to cause a coating to deposit on the cathode, wherein the aqueous resinous dispersion contains from: (A) 0.5 to 40 percent by weight of an ungelled resin formed from reacting: (i) a polyepoxide with (ii) a polyoxyalkylenepolyamine; the ratio of equivalents of active hydrogens in (ii), with primary amine groups being considered monofunctional, to equivalents of epoxy in (i) being within the range of 1.20 to 1.70:1; the reaction product being at least partially neutralized with acid to provide cationic groups, (B) 60 to 99.5 percent by weight of an additional cationic resin different from (A) and which is electrodepositable on a cathode; the percentages by weight being based on total weight of (A) plus (B).
Claim 2
Independent Claim
154 words
A method of electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode and an anode immersed in an aqueous resinous dispersion, comprising passing electric current between the anode and the cathode to cause a coating to deposit on the cathode, wherein the aqueous resinous dispersion contains from: (A) 0.5 to 40 percent by weight of an ungelled resin formed from reacting: (i) a polyepoxide with (ii) a polyoxyalkylenepolyamine; the ratio of equivalents of active hydrogens in (ii), with primary amine groups being considered monofunctional, to equivalents of epoxy in (i) being within the range of 1.20 to 1.70:1; the reaction product being at least partially neutralized with acid to provide cationic groups, (B) 60 to 99.5 percent by weight of an additional cationic resin different from (A) and which is electrodepositable on a cathode; the percentages by weight being based on total weight of (A) plus (B).
Claim 3
Dependent Claim
18 words
The method of claim 1 in which the aqueous dispersion contains from 5 to 25 percent resin solids.
Claim 4
Dependent Claim
9 words
An article coated by the method of claim 1.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the polyepoxide is a polyglycidyl ether of a cyclic polyol.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein the cyclic polyol is a diol.
Claim 7
Dependent Claim
35 words
The method of claim 5 wherein the polyglycidyl ether of the cyclic polyol is a polyglycidyl ether of bisphenol A or hydrogenated bisphenol A having a molecular weight within the range of 340 to 2000.
Claim 8
Dependent Claim
12 words
The method of claim 1 in which the polyoxyalkylenepolyamine is a polyoxypropylenepolyamine.
Claim 9
Dependent Claim
12 words
The method of claim 7 in which the polyoxypropylenepolyamine is a diamine.
Claim 10
Dependent Claim
20 words
The method of claim 1 in which the polyoxyalkylenepolyamine has a molecular weight within the range of 137 to 3600.
Claim 11
Dependent Claim
19 words
The method of claim 9 in which the polyoxyalkylenepolyamine has an amine equivalent weight of about 69 to 1800.
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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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |