US4140729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester coil coating composition
Assignee: Valspar Corp
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Filing: 1978-01-03
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Granted: 1979-02-20
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Expires: 1998-01-03
Abstract
Abstract There are provided linear polyesters of 1,6-hexanediol, short chain alkylene glycol, a phthalic acid, and optionally adipic acid. These polyesters are combined with an aminoplast and acid catalyst to form coating compositions which, when applied to a substrate and baked, provide a coating having an outstanding combination of flexibility, hardness, adhesion, extendability, dry heat resistance, weather resistance, and exterior color fastness.
Inventors
- 👤 Michael A. Tobias
- 👤 Conrad L. Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C09; C09D; C09D167/00; C09D167/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
A coating composition comprising a linear thermosetting polyester resin based upon, by weight of the total weight of reactant, between about 5 percent and about 15 percent 1,6-hexanediol; between about 25 percent and about 35 percent 1,3-butanediol, 1.2-propanediol,neopentyl glycol, or a mixture of ethylene glycol and neopentyl glycol in a weight ratio of ethylene glycol to neopentyl glycol of between about 0.3 and about 0.7; between about 50 percent and about 70 percent phthalic acid component; and between zero percent and about 12 percent adipic acid; said resin having a number average molecular weight of 1,500-5,000 and a combined acid number and hydroxyl number of 20-70 mg. KOH per gram of polyester, between about 10 weight percent and about 20 weight percent on resin solids of an aminoplast, between about 0.1 and 1.0 weight percent on resin solids of an acid catalyst and an inert organic solvent in an amount sufficient to provide a solids content of between about 50 weight percent and about 75 weight percent.
Claim 2
Dependent Claim
167 words
A coating composition comprising a linear thermosetting polyester resin based upon, by weight of the total weight of reactant, between about 5 percent and about 15 percent 1,6-hexanediol; between about 25 percent and about 35 percent 1,3-butanediol, 1.2-propanediol,neopentyl glycol, or a mixture of ethylene glycol and neopentyl glycol in a weight ratio of ethylene glycol to neopentyl glycol of between about 0.3 and about 0.7; between about 50 percent and about 70 percent phthalic acid component; and between zero percent and about 12 percent adipic acid; said resin having a number average molecular weight of 1,500-5,000 and a combined acid number and hydroxyl number of 20-70 mg. KOH per gram of polyester, between about 10 weight percent and about 20 weight percent on resin solids of an aminoplast, between about 0.1 and 1.0 weight percent on resin solids of an acid catalyst and an inert organic solvent in an amount sufficient to provide a solids content of between about 50 weight percent and about 75 weight percent.
Claim 3
Dependent Claim
8 words
The composition of claim 1 containing a pigment.
Claim 4
Dependent Claim
11 words
The composition of claim 2, wherein said pigment is titanium dioxide.
Claim 5
Dependent Claim
10 words
The composition of claim 3, wherein said aminoplast is hexamethoxymethylmelamine.
Claim 6
Dependent Claim
114 words
A coating composition comprising the polyester resin defined in claim 1 based upon, by weight of the total weight of reactants, about 10.0 percent 1,6-hexanediol; about 29.4 percent 1,3-butanediol; about 57.7 percent isophthalic acid; and about 2.9 percent adipic acid; said resin having a number average molecular weight of 3765 and a combined acid number and hydroxyl number of 38.1 mg. KOH per gram of polyester, about 10 weight percent on resin solids of hexamethyoxymethylmelamine, about 0.4 weight percent on resin solids of para-toluene sulfonic acid, TiO 2 pigment at a pigment/resin ratio of 1/1, and an inert organic solvent in an amount sufficient to provide a solids content of about 65 weight percent.
Claim 7
Dependent Claim
65 words
A coating composition comprising the polyester resin defined in claim 1 based upon, by weight of the total weight of reactants, about 10.0 percent 1,6-hexanediol; about 28.9 percent 1,3-butanediol; about 61.1 percent isophthalic acid; and zero percent adipic acid; said resin having a number average molecular weight of 3845 and a combined acid number and hydroxyl number of 46.3 mg. KOH per gram of polyester.
Claim 8
Dependent Claim
113 words
A coating composition comprising the polyester resin defined in claim 1 based upon, by weight of the total weight of reactants, about 10.2 percent 1,6-hexanediol; about 26.3 percent 1,2-propanediol; about 52.1 percent isophthalic acid; and about 11.5 percent adipic acid; said resin having a number average molecular weight of 3579 and a combined acid number and hydroxyl number of 46.5 mg. KOH per gram of polyester, about 15 weight percent on resin solids of hexamethoxy-methylmelamine, about 0.5 weight percent on resin solids of para-toluenesulfonic acid, TiO 2 pigment at a pigment/resin ratio of 0.9/1, and an inert organic solvent in an amount sufficient to provide a solids content of about 68.7 weight percent.
Claim 9
Dependent Claim
114 words
A coating composition comprising the polyester resin defined in claim 1 based upon, by weight of the total weight of reactants, about 10.0 percent 1,6-hexanediol; about 31.9 percent neopentyl glycol; about 52.0 percent isophthalic acid; and about 6.2 percent adipic acid; said resin having a number average molecular weight of 3721 and a combined acid number and hydroxyl number of 42.6 mg. KOH per gram of polyester, about 15 weight percent on resin solids of hexamethoxymethylmelamine, about 0.3 weight percent on resin solids of para-toluenesulfonic acid, TiO 2 pigment at a pigment/resin ratio of 1/1 and an inert organic solvent in an amount sufficient to provide a solids content of about 71.5 weight percent.
Claim 10
Dependent Claim
56 words
A coating composition comprising the polyester resin of claim 1, about 10 weight percent on resin solids of hexamethoxymethylmelamine, about 0.4 weight percent on resin solids of para-toluenesulfonic acid, TiO 2 pigment at a pigment/resin ratio of 1/1, and inert organic solvent in an amount sufficient to provide a solids content of about 65 weight percent.
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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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |