US4128515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water reducible epoxy esters and coating compositions containing them
Assignee: Valspar Corp
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Filing: 1977-09-14
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Granted: 1978-12-05
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Expires: 1997-09-14
Abstract
Abstract There is provided an acidic ester of a polyepoxy resin, preferably diglycidyl ether of a bisphenol, esterified with an aliphatic dicarboxylic acid. The acid ester is dispersed in alcoholic solvents and water, with a volatile base and further blended with a cross-linking agent and non-ionic surfactant to afford an aqueous dispersion useful as a heat curable coating for beverage cans, coil stock, fabricated metal, and the like.
Inventors
- 👤 Michael A. Tobias
- 👤 Carlos J. Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:29
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08K; C08K5/00; C08K5/04; C08K5/09; C08L; C08L61/00; C08L61/20; C08L63/00; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
54 words
An epoxy ester comprising an ester adduct of at least one polyfunctional epoxy resin containing more than one 1,2-epoxy group with a dicarboxylic acid, in a ratio of dicarboxylic acid equivalents to epoxide equivalents of from 1.20 to 1.50, wherein said ester adduct has an acid number of between about 20 and about 40.
Claim 2
Dependent Claim
54 words
An epoxy ester comprising an ester adduct of at least one polyfunctional epoxy resin containing more than one 1,2-epoxy group with a dicarboxylic acid, in a ratio of dicarboxylic acid equivalents to epoxide equivalents of from 1.20 to 1.50, wherein said ester adduct has an acid number of between about 20 and about 40.
Claim 3
Dependent Claim
17 words
The epoxy ester of claim 1, wherein said epoxy resin is a diglycidyl ether of a bisphenol.
Claim 4
Dependent Claim
27 words
The epoxy ester of claim 2, wherein said bisphenol is bisphenol A and said epoxy resin has an epoxy equivalent of between about 170 and about 2200.
Claim 5
Dependent Claim
33 words
The epoxy ester of claim 3, wherein said epoxy resin is an epoxy resin having an epoxy equivalent of about 493, said dicarboxylic acid is adipic acid, and said acid number is 36.3.
Claim 6
Dependent Claim
49 words
The epoxy ester of claim 3, wherein said epoxy resin is a mixture of one part epoxy resin having an epoxy equivalent of about 493 and one part epoxy resin having an epoxy equivalent of about 877, said dicarboxylic acid is succinic acid, and said acid number is 30.1.
Claim 7
Dependent Claim
49 words
The epoxy ester of claim 3, wherein said epoxy resin is a mixture of one part epoxy resin having an epoxy equivalent of about 493 and 7 parts epoxy resin having an epoxy equivalent of about 877, said dicarboxylic acid is succinic acid, and said acid number is 25.1.
Claim 8
Dependent Claim
49 words
The epoxy ester of claim 3, wherein said epoxy resin is a mixture of one part epoxy resin having an epoxy equivalent of about 493 and one part epoxy resin having an epoxy equivalent of about 877, said dicarboxylic acid is adipic acid, and said acid number is 32.7.
Claim 9
Dependent Claim
57 words
The epoxy ester of claim 3, wherein said epoxy resin is a mixture of one part epoxy resin having an epoxy equivalent of about 493 and one part epoxy resin having an epoxy equivalent of about 877, said dicarboxylic acid is a mixture of adipic acid and dimerized unsaturated fatty acids, and said acid number is 28.2.
Claim 10
Dependent Claim
88 words
A coating composition comprising in parts by weight per 100 parts by weight of the ester of claim 1 solubilized with, as the solubilizer, 1.5 to 15 parts ammonia, ammonium hydroxide, or a volatile tertiary amine to a pH of 7-9, in 30 to 60 parts of a solvent or mixture of solvents selected from the group consisting of alcohols, alkoxyalkanols, and glycols, 0 to 15 parts nonionic surfactant, 0 to 2 parts acid crosslinking catalyst, 1 to 30 parts curing agent, and 150 to 350 parts water.
Claim 11
Dependent Claim
28 words
The coating composition of claim 9, wherein said solubilizer is ammonium hydroxide and said nonionic surfactant is α-hydro-ω-hydroxy poly(oxyethylene) poly (oxypropylene) having an average molecular weight of 12,500.
Claim 12
Dependent Claim
41 words
The coating composition of claim 10, wherein said epoxy ester is the epoxy ester of claim 5, said solvent is a mixture of butanol and methoxyethanol, said curing agent is hexamethoxymethylmelamine, and said acidic crosslinking catalyst is α-(p-nonylphenol)-ω-hydroxy-poly(oxyethylene) sulfate ammonium salt.
Claim 13
Dependent Claim
41 words
The coating composition of claim 10, wherein said epoxy ester is the epoxy ester of claim 5, said solvent is a mixture of butanol and methoxyethanol, said curing agent is butylated urea-formaldehyde resin, and an acidic crosslinking catalyst is not used.
Claim 14
Dependent Claim
42 words
The coating composition of claim 10, wherein said epoxy ester is the epoxy ester of claim 6, said solvent is a mixture of butanol, 1-methoxy-2-propanol, and 1-butoxy-2-propanol, said curing agent is butylated urea-formaldehyde resin, and an acidic crosslinking catalyst is not used.
Claim 15
Dependent Claim
43 words
The coating composition of claim 10, wherein said epoxy ester is the epoxy ester of claim 7, said solvent is a mixture of butanol, hexoxyethanol, and propylene glycol, said curing agent is hexamethoxymethylmelamine, and said acidic crosslinking catalyst is α-(p-nonylphenol)-ω-hydroxy-poly(oxyethylene) sulfate ammonium salt.
Claim 16
Dependent Claim
43 words
The coating composition of claim 10, wherein said epoxy ester is the epoxy ester of claim 8, said solvent is a mixture of propylene glycol, hexoxyethanol, and butanol, said curing agent is hexamethoxymethylmelamine, and said acidic crosslinking catalyst is α-(p-nonylphenol)-ω-hydroxy-poly(oxyethylene) sulfate ammonium salt.
Claim 17
Dependent Claim
13 words
A metal substrate coated with the coating composition of claim 9 and baked.
Claim 18
Dependent Claim
13 words
A metal substrate coated with the coating composition of claim 11 and baked.
Claim 19
Dependent Claim
13 words
A metal substrate coated with the coating composition of claim 12 and baked.
Claim 20
Dependent Claim
13 words
A metal substrate coated with the coating composition of claim 13 and baked.
Claim 21
Dependent Claim
13 words
A metal substrate coated with the coating composition of claim 14 and baked.
Claim 22
Dependent Claim
12 words
A metal substrate coated with coating composition of claim 15 and baked.
Claim 23
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 9 and baked, containing food or beverage.
Claim 24
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 11 and baked, containing food or beverage.
Claim 25
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 12 and baked, containing food or beverage.
Claim 26
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 13 and baked, containing food or beverage.
Claim 27
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 14 and baked, containing food or beverage.
Claim 28
Dependent Claim
20 words
A metal food packaging container interior coated with the coating composition of claim 15 and baked, containing food or beverage.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |