Patent US4247659A successfully refreshed from Google Patents.
US4247659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy ester copolymer soluble in water with the aid of an amine
Assignee: DeSoto Inc
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Filing: 1979-03-09
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Granted: 1981-01-27
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Expires: 1999-03-09
Abstract
Abstract Water soluble epoxy ester copolymers adapted for sanitary can use comprise an hydroxy functional epoxy ester of a polyepoxide having an average molecular weight of about 300 to about 1100 and a 1,2-epoxy equivalency of about 1.4 to about 2.0, esterified with an at least approximately stoichiometric proportion, based on epoxide functionality, of monocarboxylic acid selected from benzoic acid, C 1 -C 8 alkyl substituted benzoic acid, and C 6 -C 10 alkanoic acid, the esterification reaction being continued to provide an acid number of less than 20, this hydroxy functional epoxy ester is polyesterified with from 1.5-8%, based on the weight of the epoxy ester, of a monoethylenically unsaturated dicarboxylic acid which resists homopolymerization to an acid number of less than 20, and the polyester so obtained is copolymerized with from 15% to 70% of monoethylenic monomers, based on the copolymer, these monoethylenic monomers including carboxyl functional monomer providing an acid number of from 20-100 in the copolymer. The copolymers are dispersed in water by salt formation with an amine and aminoplast or phenoplast resin is incorporated to provide curing reactivity.
Inventors
- 👤 Kazys Sekmakas
- 👤 Raj Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:42
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292; C08F; C08F290/00; C08F290/08; C08F290/14; C08F290/144; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
159 words
Epoxy ester copolymer soluble in water with the aid of an amine comprising the hydroxy functional epoxy ester of a polyepoxide having an average molecular weight of about 300 to about 1100 and a 1,2-epoxy equivalency of about 1.4 to about 2.0, esterified with an at least approximately stoichiometric proportion, based on epoxide functionality, of monocarboxylic acid selected from benzoic acid, C 1 -C 8 alkyl substituted benzoic acid, and C 6 -C 10 alkanoic acid, the esterification reaction being continued to provide an acid number of less than 20, said hydroxy functional epoxy ester being polyesterified with from 1.5-8%, based on the weight of the epoxy ester, of a monoethylenically unsaturated dicarboxylic acid which resists homopolymerization to an acid number of less than 20, and said polyester being copolymerized with from 15% to 70% of monoethylenic monomers, based on the copolymer, said monoethylenic monomers including carboxyl functional monomer providing an acid number of from 20-100 in the copolymer.
Claim 2
Dependent Claim
159 words
Epoxy ester copolymer soluble in water with the aid of an amine comprising the hydroxy functional epoxy ester of a polyepoxide having an average molecular weight of about 300 to about 1100 and a 1,2-epoxy equivalency of about 1.4 to about 2.0, esterified with an at least approximately stoichiometric proportion, based on epoxide functionality, of monocarboxylic acid selected from benzoic acid, C 1 -C 8 alkyl substituted benzoic acid, and C 6 -C 10 alkanoic acid, the esterification reaction being continued to provide an acid number of less than 20, said hydroxy functional epoxy ester being polyesterified with from 1.5-8%, based on the weight of the epoxy ester, of a monoethylenically unsaturated dicarboxylic acid which resists homopolymerization to an acid number of less than 20, and said polyester being copolymerized with from 15% to 70% of monoethylenic monomers, based on the copolymer, said monoethylenic monomers including carboxyl functional monomer providing an acid number of from 20-100 in the copolymer.
Claim 3
Dependent Claim
22 words
Epoxy ester copolymer as recited in claim 1 in which said polyepoxide has an average molecular weight of from 350 to 800.
Claim 4
Dependent Claim
19 words
Epoxy ester copolymer as recited in claim 2 in which said polyepoxide is a diglycidyl ether of a bisphenol.
Claim 5
Dependent Claim
19 words
Epoxy ester copolymer as recited in claim 1 in which said monocarboxylic acid is para tertiary butyl benzoic acid.
Claim 6
Dependent Claim
33 words
Epoxy ester copolymer as recited in claim 1 in which said hydroxy functional epoxy ester is polyesterified with from 2.5-5%, based on the weight of the epoxy ester, of said unsaturated dicarboxylic acid.
Claim 7
Dependent Claim
22 words
Epoxy ester copolymer as recited in claim 1 in which said polyepoxide and said monocarboxylic acid are used in substantially stoichiometric proportions.
Claim 8
Dependent Claim
17 words
Epoxy ester copolymer as recited in claim 1 in which said unsaturated dicarboxylic acid is fumaric acid.
Claim 9
Dependent Claim
18 words
Epoxy ester copolymer as recited in claim 7 in which said carboxyl functional monomer is also fumaric acid.
Claim 10
Dependent Claim
18 words
Epoxy ester copolymer as recited in claim 1 in which at least 50% of said monomers are nonreactive.
Claim 11
Dependent Claim
24 words
Epoxy ester copolymer as recited in claim 9 in which said nonreactive monomers are selected from the group consisting of styrene and vinyl toluene.
Claim 12
Dependent Claim
21 words
Epoxy ester copolymer as recited in claim 1 in which said copolymer has an acid number of up to about 60.
Claim 13
Dependent Claim
20 words
Epoxy ester copolymer as recited in claim 9 in which the functionality of any nonacidic ractive monomer is hydroxy functionality.
Claim 14
Dependent Claim
20 words
Epoxy ester copolymer as recited in claim 9 in which the functionality of any nonacidic reactive monomer is amide functionality.
Claim 15
Dependent Claim
20 words
Epoxy ester copolymer as recited in claim 9 in which the functionality of any nonacidic reactive monomer is N-methylol functionality.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |