US3627720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide-containing compositions
Assignee: BASF Schweiz AG
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Filing: 1968-02-02
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Granted: 1971-12-14
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Expires: 1988-02-02
Abstract
Abstract Curable compositions comprising: A. A MATERIAL FORMED BY HEATING A LIQUID MIXTURE OF A POLYCARBOXYLIC ACID ANHYDRIDE WITH AN EPOXIDE ALCOHOL FREE FROM CARBOXYL GROUPS, SO THAT AT LEAST 40 PERCENT OF THE ALCOHOLIC HYDROXYL GROUP CONTENT OF THE EPOXIDE ALCOHOL IS ESTERIFIED BY THE POLYCARBOXYLIC ACID ANHYDRIDE BUT NOT MORE THAN 25 PERCENT OF THE 1,2-EPOXIDE GROUP CONTENT OF THE EPOXIDE ALCOHOL HAS REACTED WITH THE POLYCARBOXYLIC ACID ANHYDRIDE, B. A BASE IN QUANTITY SUFFICIENT TO NEUTRALIZE AT LEAST SOME OF COMPONENT (A), AND, IF REQUIRED, C. A CURING AGENT FOR COMPONENT (A).
Inventors
- 👤 Ian Geoffrey Hinton
- 👤 Bernard Peter Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:07
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/12; C08G59/18; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
170 words
A curable composition of matter suitable for coating articles by electrophoretic deposition comprising: a. a reaction product formed by heating a liquid mixture of a dicarboxylic acid anhydride with an epoxide alcohol free from carboxyl groups, the anhydride being used in a quantity sufficient to supply from 0.4 to 1.3 anhydride group equivalents per hydroxyl group equivalent of the epoxide alcohol, so that at least 40 percent of the alcoholic hydroxyl group content of the epoxide alcohol is esterified by the dicarboxylic acid anhydride but not more than 25 percent of the 1,2-epoxide group content of the epoxide alcohol has reacted with the dicarboxylic acid anhydride; b. a base in quantity at least sufficient to neutralize the free carboxyl groups of component, and c. a curing agent for component (a), which is a member selected from the group consisting of polycarboxylic acid, polycarboxylic anhydride, melamine-formaldehyde resin, urea-formaldehyde resin, melamine-formaldehyde resin etherified with an aliphatic alcohol containing one to four carbon atoms, phenolformaldehyde resin, and acrylate resin containing free carboxyl groups.
Claim 2
Dependent Claim
25 words
A composition as claimed in claim 1 wherein the epoxide alcohol employed as starting material for preparing component (a) is free from esterified carboxyl groups.
Claim 3
Dependent Claim
40 words
A composition as claimed in claim 1 wherein component (a) is formed by heating the epoxide alcohol with the dicarboxylic acid anhydride in the absence of any added solvent and at a temperature in the range 60* to 150* C.
Claim 4
Dependent Claim
27 words
A composition as claimed in claim 1, wherein component (a) is formed by heating together the epoxide alcohol and dicarboxylic acid anhydride for at least 30 minutes.
Claim 5
Dependent Claim
28 words
A composition as claimed in claim 6, wherein component (a) is formed by heating together the epoxide alcohol and dicarboxylic acid anhydride for from 1 to 3 hours.
Claim 6
Dependent Claim
32 words
A composition as claimed in claim 6, wherein component (a) is formed by heating the epoxide alcohol and the dicarboxylic acid anhydride at a temperature in the range 80* to 130* C.
Claim 7
Dependent Claim
29 words
A composition as claimed in claim 1, wherein the epoxide alcohol used for the preparation of component (a) has a 1,2-epoxide content of at least 1.0 equivalent per kilogram.
Claim 8
Dependent Claim
38 words
A composition as claimed in claim 1, wherein the epoxide alcohol used for the preparation of component (a) contains no substituent groups, apart from 1,2-epoxide groups and alcoholic hydroxyl groups, capable of reaction with the dicarboxylic acid anhydride.
Claim 9
Dependent Claim
27 words
A composition as claimed in claim 1, wherein the epoxide alcohol used for the preparation of component (a) contains, per average molecule, more than one 1,2-epoxide group.
Claim 10
Dependent Claim
43 words
A composition as claimed in claim 1, wherein the dicarboxylic acid anhydride used for the preparation of component (a) contains no substituent groups, other than dicarboxylic acid anhydride groups, capable of reaction with 1,2-epoxide groups or alcoholic hydroxyl groups of the epoxide alcohol.
Claim 11
Dependent Claim
40 words
A composition as claimed in claim 1, wherein the alcoholic hydroxyl groups of the epoxide alcohol used for the preparation of component (a) are members selected from the group consisting of primary alcoholic hydroxyl groups and secondary alcoholic hydroxyl groups.
Claim 12
Dependent Claim
46 words
A composition as claimed in claim 1, wherein the epoxide alcohol used for the preparation of component (a) is of the formula where Z denotes The group of formula and q is a number having a value of at least one but not more than 10.
Claim 13
Dependent Claim
33 words
A composition as claimed in claim 1, wherein the dicarboxylic acid anhydride used for the preparation of component (a) is a member selected from the group consisting of tetrahydrophthalic anhydride and hexahydrophthalic anhydride.
Claim 14
Dependent Claim
30 words
A composition as claimed in claim 1, wherein the base (b) is an aqueous solution of a member selected from the group consisting of ammonia, sodium hydroxide and potassium hydroxide.
Claim 15
Dependent Claim
60 words
A composition as claimed in claim 2, wherein the curing agent (c) is a member selected from the group consisting of melamine-formaldehyde resin, urea-formaldehyde resin, melamine-formaldehyde resin etherified with an aliphatic alcohol containing one to four carbon atoms, urea-formaldehyde resin etherified with an aliphatic alcohol containing one to four carbon atoms, phenol-formaldehyde resin and acrylate resin containing free carboxyl groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |