EP0070118A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Thermosetting powder coating compositions
Assignee: Kodak Ltd
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Filing: 1982-06-28
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Granted: —
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Expires: 2002-06-28
Abstract
Abstract A linear saturated crystalline polyester comprising an acid component containing at least 40 mole per cent of terephthalic or isophthalic acid moieties and a dihydric alcohol component containing at least 40 mole per cent of 1,6-hexanediol moieties, and having a number average molecular weight of 700 to 3000, a melt viscosity of 50-3000 cP at 160°C and a hydroxyl number of 30 to 160 is very suitable for use in powder coating compositions. These compositions contain a curing agent to cross-link the polyester and may contain an acid crosslinking catalyst.
Inventors
- 👤 Paul Mcbride
- 👤 David Thomas Passmore
- 👤 Carl W. Wooten
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 13:43
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
73 words
A linear saturated crystalline polyester of an acid component and a dihydric alcohol component, at least 40 mole per cent of the acid component being a terephthalic or isophthalic acid moiety and at least 40 mole per cent of the dihydric alcohol component being a 1,6-hexanediol moiety, the polyester having a number average molecular weight of 700 to 3000, a melt viscosity of 50-3000 cP at 160°C and a hydroxyl number of 30-160.
Claim 2
Dependent Claim
73 words
A linear saturated crystalline polyester of an acid component and a dihydric alcohol component, at least 40 mole per cent of the acid component being a terephthalic or isophthalic acid moiety and at least 40 mole per cent of the dihydric alcohol component being a 1,6-hexanediol moiety, the polyester having a number average molecular weight of 700 to 3000, a melt viscosity of 50-3000 cP at 160°C and a hydroxyl number of 30-160.
Claim 3
Dependent Claim
14 words
A polyester according to claim 1 having a number average molecular weight of 1000-2000.
Claim 4
Dependent Claim
17 words
A polyester according to claim 1 or 2 having a melt viscosity of 50 to 100 cP.
Claim 5
Dependent Claim
15 words
A polyester according to any of the preceding claims having a hydroxyl number of 50-125.
Claim 6
Dependent Claim
31 words
A polyester according to any of the preceding claims wherein the dihydric alcohol component contains moieties of at least one of the glycols : ethylene glycol, 1,4-butanediol, neopentyl glycol and 1,4-cyclohexanedimethanol.
Claim 7
Dependent Claim
15 words
A polyester according to any of the preceding claims which comprises moieties of a polyol.
Claim 8
Dependent Claim
16 words
A polyester according to any of the preceding claims which comprises moieties of a polybasic acid.
Claim 9
Dependent Claim
20 words
A polyester according to claim 7 wherein the polybasic acid is trimellitic acid, the moieties being derived from trimellitic anhydride.
Claim 10
Dependent Claim
28 words
A thermosetting composition which contains a polyester according to any of the preceding claims and a curing agent which is reactive with hydroxyl groups to crosslink the polyester.
Claim 11
Dependent Claim
17 words
A composition according to claim 9 wherein the curing agent is a blocked isocyanate or a melamine.
Claim 12
Dependent Claim
17 words
A composition according to claim 9 or 10 which contains a catalyzing amount of an acid catalyst.
Claim 13
Dependent Claim
24 words
A composition according to claim 11 wherein the weight of the catalyst present is from 0.01 to 5% of the weight of the polyester.
Claim 14
Dependent Claim
24 words
A composition according to any of claims 9 to 12 which is in particulate form of a size suitable for coating as a powder.
References Cited (Backward Citations)
DE2837522B1
Cited
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