US4489182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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: 1984-12-18
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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 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
2026-11-07 08:24
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; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
35 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 gamma- and/or delta-hydroxyester groups per molecule, (C) a transesterification catalyst.
Claim 2
Dependent Claim
35 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 gamma- and/or delta-hydroxyester groups per molecule, (C) a transesterification catalyst.
Claim 3
Dependent Claim
16 words
The composition of claim 1 in which the crosslinking agent contains at least two gamma-hydroxyester groups.
Claim 4
Dependent Claim
25 words
The composition of claim 2 in which the crosslinking agent is formed from reacting a polycarboxylic acid or its functional equivalent thereof with a 1,3-polyol.
Claim 5
Dependent Claim
23 words
The composition of claim 3 in which the 1,3-polyol is selected from the class consisting of trimethylolethane, 1,3-butanediol, 1,3-propanediol 1,3-propanediol and mixtures thereof.
Claim 6
Dependent Claim
16 words
The composition of claim 1 in which the crosslinking agent contains at least two delta-hydroxyester groups.
Claim 7
Dependent Claim
25 words
The composition of claim 5 in which the crosslinking agent is formed from reacting a polycarboxylic acid or its functional equivalent thereof with a 1,4-polyol.
Claim 8
Dependent Claim
11 words
The composition of claim 6 in which the 1,4-polyol is 1,4-butanediol.
Claim 9
Dependent Claim
33 words
The composition of claim 3, 4, 6 or 7 in which the polycarboxylic acid or its functional equivalent thereof is selected from the class consisting of trimellitic anhyride, adipic acid and phthalic anhydride.
Claim 10
Dependent Claim
18 words
The composition of claim 1 in which the polymeric polyol has a hydroxyl value of at least 170.
Claim 11
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 12
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 13
Dependent Claim
18 words
The composition of claim 11 in which the polyglycidyl ether has a molecular weight of at least 500.
Claim 14
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 15
Dependent Claim
20 words
The composition of claim 13 in which the cationic salt groups are amine salt groups or quaternary ammonium base groups.
Claim 16
Dependent Claim
32 words
The composition of claim 14 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 an acid.
Claim 17
Dependent Claim
17 words
The composition of claim 15 in which the polyepoxide is a polyglycidyl ether of a cyclic polyol.
References Cited (Backward Citations)
GB739701A
Cited
US3937679A
Cited
GB1283653A
Cited
GB1525331A
Cited
US4101486A
Cited
GB1531046A
Cited
EP0008262A1
Cited
US4307153A
Cited
US4332711A
Cited
EP0040867A2
Cited
US4362847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |