US4119609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable epoxy-carboxylic acid adducts
Assignee: Shell USA Inc
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Filing: 1977-03-28
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Granted: 1978-10-10
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Expires: 1997-03-28
Abstract
Abstract Adducts of epoxy compounds with amino-substituted aromatic carboxylic acids are described. These carboxyl-containing adducts may be cured with conventional epoxy curing agents or solubilized to prepare aqueous coating systems.
Inventors
- 👤 Roy A. Allen
- 👤 Leroy W. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:59
CPC Classifications
C; C09; C09D; C09D163/00; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/40; C08G59/50; C08G59/52; C09D161/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A curable, carboxyl-containing precondensate prepared by reacting at a temperature from about 150° F. to about 250° F. (1) an epoxy compound containing more than one vicinal epoxy group with (2) an amino-substituted aromatic carboxylic acid, said precondensate having a theoretical acid number of from about 30 to 90 and a weight per epoxy of from about 2400 to about 40,000.
Claim 2
Dependent Claim
61 words
A curable, carboxyl-containing precondensate prepared by reacting at a temperature from about 150° F. to about 250° F. (1) an epoxy compound containing more than one vicinal epoxy group with (2) an amino-substituted aromatic carboxylic acid, said precondensate having a theoretical acid number of from about 30 to 90 and a weight per epoxy of from about 2400 to about 40,000.
Claim 3
Dependent Claim
25 words
The precondensate of claim 1 wherein the epoxy compound is a glycidyl polyether of 2,2-bis(4-hydroxyphenyl) propane having a molecular weight between about 350 and 3000.
Claim 4
Dependent Claim
46 words
The precondensate of claim 1 wherein the aromatic carboxylic acid has the following formula: ##STR4## wherein X is selected from the group consisting of hydroxyl, alkyl and halogen radicals, n has a value of 1 or 2 and m has the value of 0 or 1.
Claim 5
Dependent Claim
13 words
The precondensate of claim 3 wherein m is zero and n is 1.
Claim 6
Dependent Claim
11 words
The precondensate of claim 4 wherein the acid is para-aminobenzoic acid.
Claim 7
Dependent Claim
31 words
The precondensate of claim 1 wherein the precondensate has a theoretical acid number of from about 40 to 60 and a weight per epoxy of from about 10,000 to about 40,000.
Claim 8
Dependent Claim
18 words
The curable composition comprising the precondensate of claim 1 and a curing amount of an epoxy curing agent.
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |