US4423167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous compositions curable through a transesterification curing mechanism
Assignee: PPG Industries Inc
•
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-alkoxyester 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 02:39
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: 13
Claim 1
Independent Claim
49 words
A coating composition which is heat curable to give a solvent-resistant coating comprising: (A) a polymeric polyol, (B) a polyester crosslinking agent having at least two beta-alkoxyester groups per molecule, (C) a transesterification catalyst; said composition being substantially free of polyesters containing more than one beta-hydroxyester group per molecule.
Claim 2
Dependent Claim
49 words
A coating composition which is heat curable to give a solvent-resistant coating comprising: (A) a polymeric polyol, (B) a polyester crosslinking agent having at least two beta-alkoxyester groups per molecule, (C) a transesterification catalyst; said composition being substantially free of polyesters containing more than one beta-hydroxyester group per molecule.
Claim 3
Dependent Claim
18 words
The composition of claim 1 in which the polymeric polyol has a hydroxyl value of at least 170.
Claim 4
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 5
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 6
Dependent Claim
18 words
The composition of claim 4 in which the polyglycidyl ether has a molecular weight of at least 500.
Claim 7
Dependent Claim
28 words
The composition of claim 1 in which the crosslinking agent is prepared from reacting a polycarboxylic acid or its functional equivalent thereof with one or more 1,2-polyol monoethers.
Claim 8
Dependent Claim
29 words
The composition of claim 6 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 9
Dependent Claim
31 words
The composition of claim 6 in which the 1,2-polyol monoether is an alkyl ether of ethylene or propylene glycol in which the alkyl group contains from 1 to 6 carbon atoms.
Claim 10
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 11
Dependent Claim
19 words
The composition of claim 9 in which the polymeric polyol contains amine salt groups or quaternary ammonium base groups.
Claim 12
Dependent Claim
33 words
The composition of claim 10 in which the polymeric polyol is the reaction product of: (A) a polyepoxide with (B) an amine the reaction product being at least partially neutralized with an acid.
Claim 13
Dependent Claim
17 words
The composition of claim 11 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 |