Patent US4423169A successfully refreshed from Google Patents.
US4423169A
Expired / Lapsed
US
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Resinous compositions curable through a transesterification curing mechanism
Assignee: PPG Industries Inc
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Filing: 1981-07-29
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Granted: 1983-12-27
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Expires: 2001-07-29
Abstract
Abstract Coating compositions comprising a polymeric polyol with a polyester crosslinking agent having at least two beta- and/or gamma-ester ester 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
2026-11-01 09:23
CPC Classifications
C; C09; C09D; C09D167/00; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C09D163/00; C09D201/00; C09D201/02; C09D201/06; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
36 words
A coating composition which is heat curable to give a solvent-resistant coating comprising: (A) a polymeric polyol, (B) a crosslinking agent having at least two beta- and/or gamma-ester ester groups per molecule, (C) a transesterification catalyst.
Claim 2
Dependent Claim
36 words
A coating composition which is heat curable to give a solvent-resistant coating comprising: (A) a polymeric polyol, (B) a crosslinking agent having at least two beta- and/or gamma-ester ester groups per molecule, (C) a transesterification catalyst.
Claim 3
Dependent Claim
19 words
The composition of claim 1 in which the crosslinking agent contains at least two beta-ester ester groups per molecule.
Claim 4
Dependent Claim
33 words
The composition of claim 2 in which the crosslinking agent is formed from reacting: (A) a polycarboxylic acid or its functional equivalent thereof, (B) a 1,2-polyol or 1,2-epoxy compound, (C) a monocarboxylic acid.
Claim 5
Dependent Claim
22 words
The composition of claim 3 in which the 1,2-polyol is selected from the class consisting of ethylene glycol, propylene glycol, and 1,2-butanediol.
Claim 6
Dependent Claim
42 words
The composition of claim 3 in which the 1,2-epoxy is selected from the class consisting of 1,2-epoxy butane, a glycidyl ester of a saturated aliphatic monocarboxylic acid containing from 9 to 12 carbon atoms, ethylene oxide, propylene oxide, and n-butyl glycidyl ether.
Claim 7
Dependent Claim
19 words
The composition of claim 1 in which the crosslinking agent contains at least two gamma-ester ester groups per molecule.
Claim 8
Dependent Claim
30 words
The composition of claim 6 in which the crosslinking agent is formed from reacting: (A) a polycarboxylic acid or its functional equivalent thereof, (B) a 1,3-polyol, (C) a monocarboxylic acid.
Claim 9
Dependent Claim
21 words
The composition of claim 7 in which the 1,3-polyol is selected from the class consisting of 1,3-propanediol, trimethylolpropane, trimethylolethane, and 1,3-butanediol.
Claim 10
Dependent Claim
34 words
The composition of claim 3, 4, 5, 7 or 8 in which the polycarboxylic acid or its functional equivalent thereof is selected from the class consisting of trimellitic anhydride, adipic acid and phthalic anhydride.
Claim 11
Dependent Claim
31 words
The composition of claim 3, 4, 5, 7 or 8 in which the monocarboxylic acid is selected from the class consisting of isobutyric acid, acetic acid, propionic acid and benzoic acid.
Claim 12
Dependent Claim
18 words
The composition of claim 1 in which the polymeric polyol has a hydroxyl value of at least 170.
Claim 13
Dependent Claim
21 words
The composition of claim 1 in which the polymeric polyol has a hydroxyl value within the range of 180 to 300.
Claim 14
Dependent Claim
59 words
The composition of claim 1 in which the polymeric polyol is selected from the class consisting of: (A) a polyglycidyl ether of a cyclic polyol, (B) the reaction product of a polyglycidyl ether of a cyclic polyol with an amine, (C) the at least partially acid-neutralized reaction product of a polyglycidyl ether of a cyclic polyol with an amine.
Claim 15
Dependent Claim
18 words
The composition of claim 13 in which the polyglycidyl ether has a molecular weight of at least 500.
Claim 16
Dependent Claim
21 words
The composition of claim 1 which is dispersed in aqueous medium and in which the polymeric polyol contains cationic salt groups.
Claim 17
Dependent Claim
20 words
The composition of claim 15 in which the cationic salt groups are amine salt groups or quaternary ammonium base groups.
Claim 18
Dependent Claim
27 words
The composition of claim 16 which is formed from reacting: (A) a polyepoxide, (B) an amine; said reaction product being at least partially neutralized with an acid.
Claim 19
Dependent Claim
17 words
The composition of claim 17 in which the polyepoxide is a polyglycidyl ether of a cyclic polyol.
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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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |