US4387214A
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: 1983-06-07
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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. At least 40 mole percent of the acid moiety is a terephthalic or isophthalic acid moiety, and the polyester contains as moieties of the dihydric alcohol about 40-100 mole percent 1,6-hexanediol, the polyester being further characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3000 cps at 160 DEG C. and a hydroxyl number of about 30-160.
Inventors
- 👤 David T. Passmore
- 👤 Willis C. Wooten
- 👤 Paul McBride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/20; C09; C09D; C09D167/00; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
77 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic or isophthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol, said polyester being further characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3000 cps at 160° C. and a hydroxyl number of about 30-160.
Claim 2
Dependent Claim
77 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic or isophthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol, said polyester being further characterized as having a molecular weight of about 700-3000, a melt viscosity of about 50-3000 cps at 160° C. and a hydroxyl number of about 30-160.
Claim 3
Dependent Claim
27 words
A polyester according to claim 1 containing moieties of at least one other glycol selected from the group consisting of ethylene glycol, 1,4-butanediol, neopentyl glycol and 1,4-cyclohexanedimethanol.
Claim 4
Dependent Claim
11 words
A polyester according to claim 2 wherein the glycol is 1,4-butanediol.
Claim 5
Dependent Claim
13 words
A polyester according to claim 1 wherein the molecular weight is about 1000-2000.
Claim 6
Dependent Claim
13 words
A polyester according to claim 1 wherein the hydroxyl number is about 50-125.
Claim 7
Dependent Claim
75 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol, 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.
Claim 8
Dependent Claim
75 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol, 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.
Claim 9
Dependent Claim
92 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol and a second glycol selected from the group consisting of ethylene glycol, 1,4-butanediol, neopentyl glycol and 1,4-cyclohexanedimethanol, 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.
Claim 10
Dependent Claim
92 words
A linear saturated crystalline polyester of an acid moiety and a moiety of a dihydric alcohol, at least 40 mole percent of the acid moiety being a terephthalic acid moiety, said polyester containing as moieties of the dihydric alcohol at least 40 mole percent 1,6-hexanediol and a second glycol selected from the group consisting of ethylene glycol, 1,4-butanediol, neopentyl glycol and 1,4-cyclohexanedimethanol, 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.
Claim 11
Dependent Claim
31 words
A polyester according to claim 1 wherein from about 0.1 to about 12 mole % of the acid moiety is replaced with a polybasic acid having at least three functional groups.
Claim 12
Dependent Claim
13 words
A polyester according to claim 8 wherein the polybasic acid is trimellitic anhydride.
Claim 13
Dependent Claim
31 words
A polyester according to claim 7 wherein from about 0.1 to about 12 mole % of the acid moiety is replaced with a polybasic acid having at least three functional groups.
Claim 14
Dependent Claim
13 words
A polyester according to claim 10 wherein the polybasic acid is trimellitic anhydride.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |