US4229555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester coil coating compositions
Assignee: Valspar Corp
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Filing: 1979-07-26
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Granted: 1980-10-21
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Expires: 1999-07-26
Abstract
Abstract Linear thermosettable polyester resin compositions are prepared from benzenedicarboxylic acid, an alkyl dicarboxylic acid, (e.g. 1,6-hexanedioic acid), and a short chain alkylene diol component (e.g. 2,2-dimethyl-1,3-propanediol), the resin having a number average molecular weight of about 1,500 to about 5,000 and combined acid and hydroxyl values of about 20 to about 60 mg of KOH per gram of polyester. When these polyesters are combined with an aminoplast and an acid catalyst they form coating compositions which, when applied to a substrate and cured, provide a coating having an outstanding combination of hardness, adhesion, extendability, flexibility and dry heat resistance.
Inventors
- 👤 Michael A. Tobias
- 👤 Conrad L. Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:15
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C09; C09D; C09D167/00; C09D167/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A linear thermosettable polyester resin derived from a reaction mixture comprising: (a) between about 38 and 43 percent by weight of a short chain alkylene diol component; (b) between about 11 and about 17 percent by weight of an alkyl dicarboxylic acid having 4 to 7 carbon atoms in the primary carbon chain between the two carboxylic acid groups; (c) between about 40 and 47 percent by weight of a benzenedicarboxylic acid component; and (d) said polyester resin having a number average molecular weight of from about 1,500 to about 5,000 and a combined acid and hydroxyl number of about 20 to about 60 milligrams of KOH per gram of polyester.
Claim 2
Dependent Claim
111 words
A linear thermosettable polyester resin derived from a reaction mixture comprising: (a) between about 38 and 43 percent by weight of a short chain alkylene diol component; (b) between about 11 and about 17 percent by weight of an alkyl dicarboxylic acid having 4 to 7 carbon atoms in the primary carbon chain between the two carboxylic acid groups; (c) between about 40 and 47 percent by weight of a benzenedicarboxylic acid component; and (d) said polyester resin having a number average molecular weight of from about 1,500 to about 5,000 and a combined acid and hydroxyl number of about 20 to about 60 milligrams of KOH per gram of polyester.
Claim 3
Dependent Claim
13 words
The polyester resin of claim 1 wherein the alkylene diol component is 2,2-dimethyl-1,3-propanediol.
Claim 4
Dependent Claim
29 words
The polyester resin of claim 1 wherein the alkylene diol component comprises 2,2-dimethyl-1,3-propanediol in admixture with one or more members of the group consisting of 1,3-butanediol, 1,2-ethanediol and 1,2-propanediol.
Claim 5
Dependent Claim
15 words
The polyester resin of claim 1 wherein the alkyl dicarboylic acid component is 1,6-hexanedioic acid.
Claim 6
Dependent Claim
28 words
The polyester resin of claim 1 wherein the benzenedicarboxylic acid component is one or more members of the group consisting of: 1,3-benzenedicarboxylic acid, 1,2-benzenedicarboxylic acid and 1,2-benzenedicarboxylic anhydride.
Claim 7
Dependent Claim
14 words
The polyester resin of claim 5 wherein the benzenedicarboxylic acid component is 1,3-benzenedicarboxylic acid.
Claim 8
Dependent Claim
29 words
The polyester resin of claim 1 wherein the alkylene diol component is 2,2-dimethyl-1,3-propanediol, the alkyl dicarboxylic acid component is 1,6-hexanedioic acid and the benzenedicarboxylic acid component is 1,3-benzenedicarboxylic acid.
Claim 9
Dependent Claim
34 words
The polyester resin of claim 1 wherein the alkylene diol component is 2,2-dimethyl-1,3-propanediol, the alkyl dicarboxylic acid component is 1,6-hexanedioic and the benzenedicarboxylic acid component comprises a mixture of 1,3-benzenedicarboxylic acid with 1,2-benzenedicarboxylic anhydride.
Claim 10
Dependent Claim
73 words
A coating composition comprising the polyester resin of claim 1, between about 5 and about 35 weight percent of an aminoplast cross-linking agent on resin solids, between about 0.1 and about 1.0 weight percent of an acid catalyst on resin solids, and an inert organic solvent in an amount sufficient to provide a solids content of between about 25 weight percent and about 55 weight percent, based on the weight of the composition.
Claim 11
Dependent Claim
11 words
The coating composition of claim 9 additionally comprising a pigmenting agent.
Claim 12
Dependent Claim
73 words
A coating composition comprising the polyester resin of claim 7, between about 5 and about 35 weight percent of an aminoplast cross-linking agent on resin solids, between about 0.1 and about 1.0 weight percent of an acid catalyst on resin solids, and an inert organic solvent in an amount sufficient to provide a solids content of between about 25 weight percent and about 55 weight percent, based on the weight of the composition.
Claim 13
Dependent Claim
71 words
A coating composition comprising the polyester resin of claim 8, between about 5 and about 35 weight percent of an aminoplast cross-linking agent on resin solids, between about 0.1 and about 1.0 weight percent of an acid catalyst on resin solids, and an inert organic solvent in an amount sufficient to provide a solids content of between about 25 and about 55 weight percent, based on the weight of the composition.
Claim 14
Dependent Claim
12 words
A substrate having a coating of a cured composition of claim 9.
Claim 15
Dependent Claim
12 words
A substrate having a coating of a cured composition of claim 11.
Claim 16
Dependent Claim
12 words
A substrate having a coating of a cured composition of claim 12.
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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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |