US4098744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable water-borne epoxy resin coating compositions
Assignee: Shell USA Inc
•
Filing: 1977-03-28
•
Granted: 1978-07-04
•
Expires: 1997-03-28
Abstract
Abstract Hydrolytically-stable, water-soluble curable coating compositions are prepared by (1) condensing an epoxy resin with an amino-substituted aromatic carboxylic acid, preferably an amino-substituted benzoic acid, and then (2) essentially neutralizing the condensate with an amine, preferably a tertiary amine such as triethylamine and dimethylethanol amine or ammonia.
Inventors
- 👤 Roy A. Allen
- 👤 Leroy W. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
C; C09; C09D; C09D163/00; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/52; C09D161/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
62 words
A hydrolytically-stable, heat-curable composition comprising: (1) a water-soluble composition prepared by (a) condensing near chemical equivalent amounts of an epoxy resin having more than one 1,2-epoxy group with an amino-containing aromatic carboxylic acid, and (b) solubilizing the resulting condensate by reacting the pendant carboxyl groups with an amine or ammonia, and (2) a curing amount of a water-miscible aminoplast or phenoplast resin.
Claim 2
Dependent Claim
62 words
A hydrolytically-stable, heat-curable composition comprising: (1) a water-soluble composition prepared by (a) condensing near chemical equivalent amounts of an epoxy resin having more than one 1,2-epoxy group with an amino-containing aromatic carboxylic acid, and (b) solubilizing the resulting condensate by reacting the pendant carboxyl groups with an amine or ammonia, and (2) a curing amount of a water-miscible aminoplast or phenoplast resin.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the amino-containing aromatic acid is an amino-substituted benzoic acid.
Claim 4
Dependent Claim
13 words
The composition of claim 2 wherein the amino-substituted benzoic acid is para-aminobenzoic acid.
Claim 5
Dependent Claim
24 words
The composition of claim 1 wherein the epoxy resin is a glycidyl polyether of 2,2-bis(4-hydroxyphenyl)propane having a molecular weight between about 350 and 3000.
Claim 6
Dependent Claim
20 words
The composition of claim 1 wherein the condensate of step (a) has an acid number between about 30 and 90.
Claim 7
Dependent Claim
12 words
The composition of claim 1 wherein the amine is a tertiary amine.
Claim 8
Dependent Claim
11 words
The composition of claim 6 wherein the tertiary amine is 2-dimethylamino-2-methyl-1-propanol.
Claim 9
Dependent Claim
10 words
The composition of claim 1 wherein the amine is 2-amino-2-methyl-1-propanol.
Claim 10
Dependent Claim
11 words
The composition of claim 6 wherein the tertiary amine is dimethylethanolamine.
Claim 11
Dependent Claim
14 words
The composition of claim 1 wherein the curing agent is a hexamethoxy methylmelamine resin.
Claim 12
Dependent Claim
16 words
The composition of claim 1 comprising from about 20 to about 30% nonvolatiles in a solvent.
Claim 13
Dependent Claim
28 words
The composition of claim 11 wherein the solvent consists of from 70% to 90% by volume of water and from 10% to 30% by volume of organic solvent.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |