US4145324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coatings based on hydrolyzed epoxy resins
Assignee: Valspar Corp
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Filing: 1977-02-09
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Granted: 1979-03-20
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Expires: 1997-02-09
Abstract
Abstract Poly-1,2-epoxy resins, such as diglycidyl ethers of bisphenols, are hydrolyzed at high solids content in organic solvents, such as hexoxyethanol. The hydrolyzed epoxy resins are used in coating formulations (aqueous emulsions or solutions) together with curing agent and, optionally, a catalyst for cross-linking.
Inventors
- 👤 Albert C. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:55
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1405; C08G59/1427; C09; C09D; C09D163/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31688
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
A coating formulation of: (a) an oil-in-water emulsion consisting essentially of a solution of a hydrolyzed poly-1,2-epoxy resin, a non-ionic surfactant, a conventional curing agent, and water; or (b) a solution consisting essentially of a hydrolyzed poly-1,2-epoxy resin and a conventional curing agent in alkoxyethanol or a mixture of alkoxyethanol with alcohols, ketones, carbitols, or acetates of alcohols, ethoxyethanol or carbitols.
Claim 2
Dependent Claim
61 words
A coating formulation of: (a) an oil-in-water emulsion consisting essentially of a solution of a hydrolyzed poly-1,2-epoxy resin, a non-ionic surfactant, a conventional curing agent, and water; or (b) a solution consisting essentially of a hydrolyzed poly-1,2-epoxy resin and a conventional curing agent in alkoxyethanol or a mixture of alkoxyethanol with alcohols, ketones, carbitols, or acetates of alcohols, ethoxyethanol or carbitols.
Claim 3
Dependent Claim
28 words
A coating formulation consisting essentially of an oil-in-water emulsion of a solution of hydrolyzed diglycidyl ether of a bisphenol, a non-ionic surfactant, a conventional curing agent, and water.
Claim 4
Dependent Claim
28 words
A coating formulation consisting essentially of an oil-in-water emulsion of a solution of hydrolyzed diglycidyl ether of a bisphenol, a non-ionic surfactant, a conventional curing agent, and water.
Claim 5
Dependent Claim
12 words
The coating formulation of claim 2 in addition to an acid catalyst.
Claim 6
Dependent Claim
29 words
The coating composition of claim 3, wherein said nonionic surfactant is a block copolymer of ethylene oxide and propylene oxide and said curing agent is a melamine-formaldehyde cross-linking agent.
Claim 7
Dependent Claim
47 words
A coating composition consisting essentially of a solution of a hydrolyzed diglycidyl ether of a bisphenol and a conventional curing agent in a solvent which is an alkoxyethanol or a mixture of alkoxyethanol with at least one alcohol, ketone, carbitol, or acetate of alcohols, ethoxyethanol, or carbitols.
Claim 8
Dependent Claim
47 words
A coating composition consisting essentially of a solution of a hydrolyzed diglycidyl ether of a bisphenol and a conventional curing agent in a solvent which is an alkoxyethanol or a mixture of alkoxyethanol with at least one alcohol, ketone, carbitol, or acetate of alcohols, ethoxyethanol, or carbitols.
Claim 9
Dependent Claim
20 words
The coating composition of claim 5, wherein said curing agent is a melamine-formaldehyde crosslinking agent and said solvent is n-hexoxyethanol.
Claim 10
Dependent Claim
10 words
The coating composition of claim 6 containing an acid catalyst.
Claim 11
Dependent Claim
33 words
The coating composition of claim 5, wherein said curing agent is a urea-formaldehyde crosslinking agent and said solvent is a mixture of ethoxyethanol acetate, toluol, methyl ethyl ketone, methyl isobutyl ketone and n-butanol.
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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |