US4352924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting powder coating compositions
Assignee: Eastman Chemical Co
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Filing: 1981-06-29
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Granted: 1982-10-05
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Expires: 2001-06-29
Abstract
Abstract Disclosed are crystalline polyesters having low melt viscosities and thermosetting compositions comprising these polyesters. The compositions are especially useful as powder coatings. The polyesters are derived from 1,4-butanediol and trans-1,4-cyclohexanedicarboxylic acid. The polyesters are characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3500 cps at 160° C. and a hydroxyl number of about 35-160. The thermosetting composition contains a curing agent which is reactive with the hydroxyl groups to crosslink the polyester.
Inventors
- 👤 Willis C. Wooten
- 👤 Winston J. Jackson, Jr.
- 👤 Herbert F. Kuhfuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/423; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C09; C09D; C09D167/00; C09D167/02; C08G2150/00; C08G2150/20; C08G2250/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moeity being of trans-1,4-cyclohexanedicarboxylic acid and 0-50 mole percent being of terephthalic acid, and the dihydric alcohol moieties consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3500 cps at 160° C. and a hydroxyl number of about 35-160.
Claim 2
Dependent Claim
76 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moeity being of trans-1,4-cyclohexanedicarboxylic acid and 0-50 mole percent being of terephthalic acid, and the dihydric alcohol moieties consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3500 cps at 160° C. and a hydroxyl number of about 35-160.
Claim 3
Dependent Claim
80 words
A thermosetting composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 700-3000 cps at 160° C. and a hydroxyl number of about 35-160, and (b) a curing agent which is reactive with hydroxyl groups to crosslink said polyester.
Claim 4
Dependent Claim
80 words
A thermosetting composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 700-3000 cps at 160° C. and a hydroxyl number of about 35-160, and (b) a curing agent which is reactive with hydroxyl groups to crosslink said polyester.
Claim 5
Dependent Claim
100 words
A thermosetting composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 1000-2000, a melt viscosity of about 50-1000 cps at 160° C. and a hydroxyl number of about 50-125, and (b) from about 10 to about 40%, based on the weight of said polyester, of a curing agent which is reactive with hydroxyl groups to crosslink said polyester.
Claim 6
Dependent Claim
100 words
A thermosetting composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 1000-2000, a melt viscosity of about 50-1000 cps at 160° C. and a hydroxyl number of about 50-125, and (b) from about 10 to about 40%, based on the weight of said polyester, of a curing agent which is reactive with hydroxyl groups to crosslink said polyester.
Claim 7
Dependent Claim
16 words
A composition according to claim 2 wherein the molecular weight of said polyester is about 1000-2000.
Claim 8
Dependent Claim
16 words
A composition according to claim 2 wherein the hydroxyl number of said polyester is about 50-125.
Claim 9
Dependent Claim
21 words
A composition according to claim 2 wherein said curing agent is selected from the group consisting of blocked isocyanates and melamines.
Claim 10
Dependent Claim
24 words
A composition according to claim 5 wherein said curing agent is an alkoxymelamine wherein the alkoxy group contains from 1 to 8 carbon atoms.
Claim 11
Dependent Claim
16 words
A composition according to claim 2 which further contains a catalyzing amount of an acid catalyst.
Claim 12
Dependent Claim
28 words
A composition according to claim 7 wherein said catalyst is present in an amount of from about 0.01 to about 5%, based on the weight of the polyester.
Claim 13
Dependent Claim
18 words
A composition according to claim 2 in particulate form of a size suitable for coating as a powder.
Claim 14
Dependent Claim
18 words
A composition according to claim 7 in particulate form of a size suitable for coating as a powder.
Claim 15
Dependent Claim
109 words
A thermosetting powder composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 1000-2000, a melt viscosity of about 50-1000 cps at 160° C. and a hydroxyl number of about 50-125, (b) from about 10 to about 40%, based on the weight of said polyester of a curing agent which is reactive with hydroxyl groups to crosslink said polyester, and (c) a catalyzing amount of an acid catalyst.
Claim 16
Dependent Claim
109 words
A thermosetting powder composition comprising (a) a linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 50 mole percent of the acid moiety being trans-1,4-cyclohexanedicarboxylic acid and the dihydric alcohol consisting essentially of 1,4-butanediol, said polyester being further characterized as having a molecular weight of about 1000-2000, a melt viscosity of about 50-1000 cps at 160° C. and a hydroxyl number of about 50-125, (b) from about 10 to about 40%, based on the weight of said polyester of a curing agent which is reactive with hydroxyl groups to crosslink said polyester, and (c) a catalyzing amount of an acid catalyst.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |