US4511447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of resinous compositions curable through a transesterification curing mechanism
Assignee: PPG Industries Inc
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Filing: 1984-08-01
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Granted: 1985-04-16
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Expires: 2004-08-01
Abstract
Abstract Coating compositions comprising a polymeric polyol with a polyester crosslinking agent having at least two gamma and/or delta-hydroxyester groups per molecule are disclosed. The compositions, when applied to a substrate and cured in the presence of a transesterification catalyst, give solvent-resistant coatings.
Inventors
- 👤 Joseph T. Valko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:12
CPC Classifications
C; C09; C09D; C09D167/00; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C09D163/00; C09D201/00; C09D201/02; C09D201/06; C09D5/00; C09D5/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A method of coating a conductive substrate serving as a cathode which comprises passing electric current between an anode and a cathode in electrical contact with an aqueous resinous dispersion, which comprises: (A) a polymeric polyol which contains cationic salt groups, (B) a crosslinking agent having at least two gamma- and/or delta-hydroxyester groups per molecule, and (C) a transesterification catalyst.
Claim 2
Independent Claim
60 words
A method of coating a conductive substrate serving as a cathode which comprises passing electric current between an anode and a cathode in electrical contact with an aqueous resinous dispersion, which comprises: (A) a polymeric polyol which contains cationic salt groups, (B) a crosslinking agent having at least two gamma- and/or delta-hydroxyester groups per molecule, and (C) a transesterification catalyst.
Claim 3
Dependent Claim
20 words
The method of claim 1 in which the cationic salt groups are amine salt groups or quaternary ammonium base groups.
Claim 4
Dependent Claim
31 words
The method of claim 2 in which the polymeric polyol is formed from reacting: (A) a polyepoxide with (B) an amine; the reaction product being at least partially neutralized with acid.
Claim 5
Dependent Claim
17 words
The method of claim 3 in which the polyepoxide is a polyglycidyl ether of a cyclic polyol.
Claim 6
Dependent Claim
16 words
The method of claim 1 in which the crosslinking agent contains at least two gamma-hydroxyester groups.
Claim 7
Dependent Claim
25 words
The method of claim 5 in which the crosslinking agent is formed from reacting a polycarboxylic acid or its functional equivalent thereof with a 1,3-polyol.
Claim 8
Dependent Claim
23 words
The method of claim 6 in which the 1,3-polyol is selected from the class consisting of trimethylolethane, trimethylolpropane, 1,3-butanediol, 1,3-propanediol and mixtures thereof.
Claim 9
Dependent Claim
16 words
The method of claim 1 in which the crosslinking agent contains at least two delta-hydroxyester groups.
Claim 10
Dependent Claim
25 words
The method of claim 8 in which the crosslinking agent is formed from reacting a polycarboxylic acid or its functional equivalent thereof with a 1,4-polyol.
Claim 11
Dependent Claim
11 words
The method of claim 9 in which the 1,4-polyol is 1,4-butanediol.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |