US4238583A
Expired / Lapsed
US
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Thermosettable polyester resin compositions
Assignee: Valspar Corp
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Filing: 1979-07-20
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Granted: 1980-12-09
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Expires: 1999-07-20
Abstract
Abstract There are disclosed thermosettable polyester resins which are the reaction products of specified amounts of a benzenedicarboxylic acid component (e.g.: 1,3-benzenedicarboxylic acid), a trihydroxy alkyl component (e.g.: 2-ethyl-2-(hydroxymethyl)-1,3-propanediol), a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 2,2-dimethyl-1,3-propanediol), a dihydroxy alkyl constituent having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties (e.g.: 1,6-hexanediol), and optionally, an alkyl dicarboxylic acid component (e.g.: 1,6-hexanedioic acid). Such polyesters, having a number average molecular weight of from about 400 to about 1400, a combined acid and hydroxyl number of about 50 to about 250 milligrams of KOH per gram of polyester, and a glass transition temperature of about -15 DEG to +25 DEG C., are found to be especially useful in high solids content coating formulations.
Inventors
- 👤 Michael A. Tobias
- 👤 Conrad L. Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:20
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/123; C08G63/127; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
170 words
A thermosettable polyester resin derived from a reaction mixture comprising: (a) between about 40 percent and about 60 percent by weight of a benzenedicarboxylic acid component; (b) between about 2 percent and about 18 percent by weight of a trihydroxy alkyl component; (c) between about 9 percent and about 23 percent by weight of a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties; (d) between about 9 percent and about 30 percent by weight of a dihydroxy alkyl compound having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties; and (e) from 0 percent to about 10 percent by weight of an alkyl dicarboxylic acid component; (f) said polyester resin having a number average molecular weight of from about 400 to about 5000, a combined acid and hydroxyl value of about 40 to about 250 milligrams of KCH per gram of polyester, and a glass transition temperature of about -15° to +25° C.
Claim 2
Dependent Claim
170 words
A thermosettable polyester resin derived from a reaction mixture comprising: (a) between about 40 percent and about 60 percent by weight of a benzenedicarboxylic acid component; (b) between about 2 percent and about 18 percent by weight of a trihydroxy alkyl component; (c) between about 9 percent and about 23 percent by weight of a short chain alkylene diol component having four or fewer carbon atoms in the primary carbon chain between the hydroxyl moieties; (d) between about 9 percent and about 30 percent by weight of a dihydroxy alkyl compound having four to ten carbon atoms in the primary carbon chain between the hydroxyl moieties; and (e) from 0 percent to about 10 percent by weight of an alkyl dicarboxylic acid component; (f) said polyester resin having a number average molecular weight of from about 400 to about 5000, a combined acid and hydroxyl value of about 40 to about 250 milligrams of KCH per gram of polyester, and a glass transition temperature of about -15° to +25° C.
Claim 3
Dependent Claim
54 words
A polyester resin as defined in claim 1 wherein said resin has a number average molecular weight of from about 400 to about 1400, a combined acid and hydroxyl value of about 50 to about 250 milligrams of KOH per gram of polyester, and a glass transition temperature of about -15° to +25° C.
Claim 4
Dependent Claim
54 words
A polyester resin as defined in claim 1 wherein said resin has a number average molecular weight of from about 1400 to about 5000, a combined acid and hydroxyl value of about 40 to about 160 milligrams of KOH per gram of polyester, and a glass transition temperature of about -15° to +25° C.
Claim 5
Dependent Claim
18 words
The polyester resin of claim 1, 2 or 3 wherein the benzenedicarboxylic acid component (a) comprises 1,3-benzenedicarboxylic acid.
Claim 6
Dependent Claim
26 words
The polyester resin of claim 1, 2 or 3 wherein the benzenedicarboxylic acid component (a) comprises a mixture of 1,3-benzenedicarboxylic acid with 1,2-benzenedicarboxylic anhydride or acid.
Claim 7
Dependent Claim
28 words
The polyester resin of claim 1, 2 or 3 wherein each of the hydroxy groups in the trihydroxy alkyl component (b) is attached to a terminal carbon atom.
Claim 8
Dependent Claim
14 words
The resin of claim 6 wherein the trihydroxy alkyl component (b) comprises a 2-ethyl-2-(hydroxymethyl)-1,3-propanediol.
Claim 9
Dependent Claim
13 words
The resin of claim 6 wherein the trihydroxy alkyl component (b) comprises 2-(hydroxymethyl)-2-methyl-1,3-propanediol.
Claim 10
Dependent Claim
17 words
The polyester resin of claim 1, 2 or 3 wherein the alkylene diol component (c) comprises 2,2-dimethyl-1,3-propanediol.
Claim 11
Dependent Claim
33 words
The polyester resin of claim 1, 2 or 3 wherein the alkylene diol component (c) comprises 2,2-dimethyl-1,3-propanediol in admixture with one or more members of the group consisting of: 1,3-butanediol; 1,2-propanediol; and 1,2-ethanediol.
Claim 12
Dependent Claim
17 words
The polyester resin of claim 1, 2 or 3 wherein the dihydroxy alkyl compound (d) comprises 1,6-hexanediol.
Claim 13
Dependent Claim
19 words
The polyester resin of claim 1, 2 or 3 wherein the alkyl dicarboxylic acid component (e) is 1,6-hexanedioic acid.
Claim 14
Dependent Claim
17 words
The polyester resin of claim 1, 2 or 3 derived from 1,3-benzenedicarboxylic acid, 2-ethyl-2-(hydroxymethyl)-1,3-propanediol, 2,2-dimethyl-1,3-propanediol, and 1,6-hexanediol.
Claim 15
Dependent Claim
77 words
A coating composition comprising the polyester resin of claim 1 or 3, between about 5 weight percent and about 25 weight percent of an aminoplast cross-linking agent on resin solids, between about 0 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 35 weight percent and about 55 weight percent, based on the weight of the composition.
Claim 16
Dependent Claim
76 words
A coating composition comprising the polyester resin of claim 1 or 2, between about 25 weight percent and about 60 weight percent of an aminoplast crosslinking agent on resin solids, between about 0 and 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 55 weight percent and about 100 weight percent, based on the weight of the composition.
Claim 17
Dependent Claim
35 words
A coating composition as defined in claim 15 wherein said organic solvent is used in an amount sufficient to provide a solids content of between about 75 and 100 weight percent of said coating composition.
Claim 18
Dependent Claim
13 words
A coating composition as defined in claim 14 additionally comprising a pigmenting agent.
Claim 19
Dependent Claim
13 words
A coating composition as defined in claim 15 additionally comprising a pigmenting agent.
Claim 20
Dependent Claim
13 words
A coating composition as defined in claim 16 additionally comprising a pigmenting agent.
Claim 21
Dependent Claim
74 words
A coating composition comprising the polyester resin of claim 13, between about 5 weight percent and about 25 weight percent of an aminoplast crosslinking agent on resin solids, between about 0 and 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 35 weight percent and about 55 weight percent, based on the weight of the composition.
Claim 22
Dependent Claim
71 words
A coating composition comprising the polyester resin of claim 13, between about 25 weight percent and about 60 weight percent of an aminoplast crosslinking agent on resin solids, between about 0 and 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 75 and 100 weight percent, based on the weight of the composition.
Claim 23
Dependent Claim
14 words
A substrate having a coating of a cured composition as defined in claim 14.
Claim 24
Dependent Claim
14 words
A substrate having a coating of a cured composition as defined in claim 15.
Claim 25
Dependent Claim
12 words
A substrate having a cured coating composition as defined in claim 16.
Claim 26
Dependent Claim
12 words
A substrate having a cured coating composition as defined in claim 20.
References Cited (Backward Citations)
US3678128A
Cited
US3852375A
Cited
US3804920A
Cited
US3957709A
Cited
US4123404A
Cited
US4113793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |