US4026857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy emulsion water-based coating
Assignee: Mobil Oil AS
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Filing: 1975-08-01
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Granted: 1977-05-31
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Expires: 1995-08-01
Abstract
Abstract A coating formulation comprises an oil-in-water emulsion of a solution of epoxy resin in an alkoxy alcohol, such as 2-hexoxyethanol (hexyl cellosolve) as the dispersed phase, a curing agent and a non-ionic surfactant. The emulsion is stable and has spreading and wetting properties over low energy and lubricated surfaces and aluminum, thus yielding films free from surface imperfections.
Inventors
- 👤 George L. Brown
- 👤 Carlos J. Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:08
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C09; C09D; C09D163/00; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
147 words
An oil-in-water emulsion coating formulation containing in parts by weight: a. 100 parts of epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 or of a mixture of two or more epoxy resins each having an epoxy equivalent weight falling within the range of between about 400 and 6,000; b. about 25 to 160 parts of an alkoxyethanol solvent having the formula ROCH 2 CH 2 OH, wherein R is C 5 -C 7 alkyl or a mixture of said alkoxyethanol and a co-solvent, selected from the group consisting of alcohols, ketones, and carbitols containing at least about 50 weight percent alkoxyethanol; c. about 2-15 parts non-ionic surfactant; d. about 0 to 2 parts of an acid cross-linking catalyst; e. about 1 to 30 parts of a conventional curing agent for an epoxy resin; and f. about 140 to 300 parts of water.
Claim 2
Dependent Claim
147 words
An oil-in-water emulsion coating formulation containing in parts by weight: a. 100 parts of epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 or of a mixture of two or more epoxy resins each having an epoxy equivalent weight falling within the range of between about 400 and 6,000; b. about 25 to 160 parts of an alkoxyethanol solvent having the formula ROCH 2 CH 2 OH, wherein R is C 5 -C 7 alkyl or a mixture of said alkoxyethanol and a co-solvent, selected from the group consisting of alcohols, ketones, and carbitols containing at least about 50 weight percent alkoxyethanol; c. about 2-15 parts non-ionic surfactant; d. about 0 to 2 parts of an acid cross-linking catalyst; e. about 1 to 30 parts of a conventional curing agent for an epoxy resin; and f. about 140 to 300 parts of water.
Claim 3
Dependent Claim
10 words
The formulation of claim 1, wherein said solvent is 2-hexoxyethanol.
Claim 4
Dependent Claim
16 words
The formulation of claim 2, wherein said epoxy resin is a diglycidyl ether of bisphenol A.
Claim 5
Dependent Claim
24 words
The formulation of claim 3, wherein said surfactant has the structure ##STR4## and has an average molecular weight between about 10,000 and about 14,000.
Claim 6
Dependent Claim
12 words
The formulation of claim 4, wherein said curing agent is an aminoplast.
Claim 7
Dependent Claim
48 words
The formulation of claim 4, wherein said epoxy resin has an epoxy equivalent weight of 2,000-2,500; said surfactant a+c is 190-200; said catalyst is an acid phosphate ester of nonylphenoxy polyoxyethylene having 45-55 polyoxyethylene units per unit of nonylphenol and said curing agent is mixed methoxy- and butoxy-methylmelamine.
Claim 8
Dependent Claim
21 words
The formulation of claim 6, wherein said curing agent is a mixture of butylated urea-formaldehyde resin and mixed methoxy- and butoxy-methylmelamine.
Claim 9
Dependent Claim
105 words
The formulation of claim 1, wherein said epoxy resin is a mixture of diglycidyl ether of bisphenol A having an epoxy equivalent weight of 2,000-2,500 and a diglycidyl ether of bisphenol A having an epoxy equivalent weight of 450-550; said solvent is a mixture of 2-hexoxyethanol and n-butanol containing 93 weight percent 2-hexoxyethanol; said surfactant has the structure ##STR5## wherein a+c is 190-200 and b is 60-70; said catalyst has the structure C 9 H 19 (C 6 H 4 )(OCH 2 CH 2 ) 4 OSO 3 NH 4 ; and said curing agent is a mixture of hexamethoxymelamine and mixed methoxy- and butoxy-methylmelamine.
Claim 10
Dependent Claim
73 words
The formulation of claim 1, wherein said epoxy resin is a diglycidyl ether of bisphenol A having an epoxy equivalent weight of 2,500-4,000; said solvent is 2-hexoxyethanol; said surfactant has the structure ##STR6## wherein a+c is 190-200 and b is 60-70; said catalyst has the structure C 9 H 19 (C 6 H 4 )(OCH 2 CH 2 ) 4 OSO 3 NH 4 ; and said curing agent is butylated urea-formaldehyde resin.
Claim 11
Dependent Claim
12 words
The formulation of claim 6, wherein said curing agent is polymeric urea.
Claim 12
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 1 and baked.
Claim 13
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 3 and baked.
Claim 14
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 6 and baked.
Claim 15
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 7 and baked.
Claim 16
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 8 and baked.
Claim 17
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 9 and baked.
Claim 18
Dependent Claim
12 words
A metal substrate coated with the formulation of claim 10 and baked.
References Cited (Backward Citations)
US3446764A
Cited
US3844998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |