Patent US4423168A successfully refreshed from Google Patents.
US4423168A
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-amido 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
2026-11-07 13:23
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: 10
Claim 1
Independent Claim
34 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-amido ester groups per molecule, (C) a transesterification catalyst.
Claim 2
Dependent Claim
34 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-amido ester groups per molecule, (C) a transesterification catalyst.
Claim 3
Dependent Claim
27 words
The composition of claim 1 in which the beta-amido ester is formed from reacting: (A) a polycarboxylic acid or its functional equivalent thereof with (B) a beta-hydroxyalkylamide.
Claim 4
Dependent Claim
82 words
The composition of claim 2 in which the beta-hydroxyalkylamide is of the structure: ##STR2## where R 1 and R 2 are hydrogen and R 1 , R 2 and R 3 are selected from the class consisting of alkyl, cycloalkyl, aryl, alkaryl including substituted radicals in which the substituents will not adversely affect the esterification reaction with the polycarboxylic acid or its functional equivalent thereof and will not adversely affect the transesterification curing reaction or the desirable properties of the coating composition.
Claim 5
Dependent Claim
29 words
The composition of claim 2 in which the polycarboxylic acid or its functional equivalent thereof is selected from the class consisting of trimellitic anhydride, phthalic anhydride and adipic acid.
Claim 6
Dependent Claim
18 words
The composition of claim 1 in which the polymeric polyol has a hydroxyl value of at least 170.
Claim 7
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 8
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 9
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 10
Dependent Claim
20 words
The composition of claim 8 in which the cationic salt groups are amine salt groups or quaternary ammonium base groups.
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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 |