US4179440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy emulsion water-based coating using water-dispersible epoxy emulsifier
Assignee: Valspar Corp
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Filing: 1978-12-26
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Granted: 1979-12-18
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Expires: 1998-12-26
Abstract
Abstract A coating formulation comprises an oil-in-water emulsion of a solution of epoxy resin or capped epoxy resin in an alkoxy alcohol, such as 2-hexoxyethanol, as the dispersed phase, a curing agent, and a water-dispersible epoxy resin emulsifier. 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
- 👤 Carlos J. Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:26
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/40; C08G59/62; C08G59/621; 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: 7
Claim 1
Independent Claim
234 words
An oil-in-water emulsion coating formulation containing in parts by weight: (a) a capped epoxy resin having an epoxy equivalent weight between about 400 and about 6,000; (b) a carboxyl functional epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 having an acid number between about 35 and about 150 or a carboxyl functional capped epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 having an acid number between about 35 and about 150; (c) the ratio of (a):(b) being between about 90 parts:10 parts and about 10 parts:90 parts, the relative proportions of the following components, based upon (a) plus (b) being 100 parts; (d) sufficient tertiary amine, ammonia, or ammonium hydroxide to neutralize (b) to a pH of about 7.0 to about 9.1; (e) between about 25 parts and about 160 parts of an alkoxyethanol solvent having the formula ROCH 2 CH 2 OH, wherein R is C 5-7 alkyl, or a mixture of said alkoxyethanol and at least one co-solvent, selected from the group consisting of alkoxy alcohols, and ketones, containing at least about 30 weight percent of said alkoxyethanol; (f) between about 0 part and about 2 parts of an acid cross-linking catalyst; (g) between about 1 part and about 30 parts of a conventional curing agent for an epoxy resin; and (h) between about 200 parts and about 600 parts of water.
Claim 2
Dependent Claim
234 words
An oil-in-water emulsion coating formulation containing in parts by weight: (a) a capped epoxy resin having an epoxy equivalent weight between about 400 and about 6,000; (b) a carboxyl functional epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 having an acid number between about 35 and about 150 or a carboxyl functional capped epoxy resin having an epoxy equivalent weight between about 400 and about 6,000 having an acid number between about 35 and about 150; (c) the ratio of (a):(b) being between about 90 parts:10 parts and about 10 parts:90 parts, the relative proportions of the following components, based upon (a) plus (b) being 100 parts; (d) sufficient tertiary amine, ammonia, or ammonium hydroxide to neutralize (b) to a pH of about 7.0 to about 9.1; (e) between about 25 parts and about 160 parts of an alkoxyethanol solvent having the formula ROCH 2 CH 2 OH, wherein R is C 5-7 alkyl, or a mixture of said alkoxyethanol and at least one co-solvent, selected from the group consisting of alkoxy alcohols, and ketones, containing at least about 30 weight percent of said alkoxyethanol; (f) between about 0 part and about 2 parts of an acid cross-linking catalyst; (g) between about 1 part and about 30 parts of a conventional curing agent for an epoxy resin; and (h) between about 200 parts and about 600 parts of water.
Claim 3
Dependent Claim
11 words
The formulation of claim 1, wherein said alkoxyethanol solvent is 2-hexoxyethanol.
Claim 4
Dependent Claim
12 words
The formulation of claim 2, wherein said curing agent is an aminoplast.
Claim 5
Dependent Claim
16 words
The formulation of claim 3, wherein said aminoplast is a commercial mixed methoxy and butoxy hexaalkoxymethylmelamine.
Claim 6
Dependent Claim
19 words
The formulation of claims 3 or 4, wherein (a) is a bisphenol A capped diglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
51 words
The formulation of claim 5, wherein (b) is an adduct of equal parts of a diglycidyl ether of bisphenol A having an epoxy equivalent weight of 450-550 and a diglycidyl ether of bisphenol A having an epoxy equivalent weight of 875-1,025 with succinic acid and having an acid number of 32.
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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |