US4425451A
Expired / Lapsed
US
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Epoxy-phosphate aqueous dispersions
Assignee: DeSoto Inc
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Filing: 1982-09-29
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Granted: 1984-01-10
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Expires: 2002-09-29
Abstract
Abstract Water dispersible epoxy-phosphate ester polymer salts are disclosed which exhibit improved stability in coating compositions contining aminoplast or phenoplast resin. These salts are provided by reacting a resinous polyepoxide having at least about 1.4 oxirane groups per molecule with less than 0.9 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide to form a monoester reaction product containing residual epoxy functionality. The monoester reaction product so-provided is then reacted with at least 1 mol of a volatile amine per equivalent of oxirane functionality in said monoester to provide a water dispersible product lacking oxirane functionality. Ether alcohols, and especially 2-butoxy ethanol, are relied upon to provide dispersions having low viscosity.
Inventors
- 👤 Kazys Sekmakas
- 👤 Raj Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1405; C08G59/1422; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
A water dispersible epoxy-phosphate ester polymer, oxirane-function-free, salt reaction product of (1) a monoester reaction product containing residual epoxy functionality, of (a) a resinous polyepoxide having at least about 1.4 oxirane groups per molecule and (b) less than 0.9 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide, with (2) at least 1 mol of a volatile amine per equivalent of oxirane functionality in said monoester.
Claim 2
Dependent Claim
68 words
A water dispersible epoxy-phosphate ester polymer, oxirane-function-free, salt reaction product of (1) a monoester reaction product containing residual epoxy functionality, of (a) a resinous polyepoxide having at least about 1.4 oxirane groups per molecule and (b) less than 0.9 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide, with (2) at least 1 mol of a volatile amine per equivalent of oxirane functionality in said monoester.
Claim 3
Dependent Claim
47 words
An epoxy-phosphate ester polymer salt as recited in claim 1 in which from 0.1 to 0.7 mol of orthophosphoric acid is used for each oxirane equivalent in said polyepoxide, and at least 2 mols of amine are used per mol of available oxirane functionality in said monoester.
Claim 4
Dependent Claim
33 words
An epoxy-phosphate ester polymer salt as recited in claim 2 in which said polyepoxide is a diglycidyl ether of a bisphenol having an average molecular weight in the range of 350 to 8000.
Claim 5
Dependent Claim
36 words
An epoxy-phosphate ester polymer salt as recited in any one of claims 1-3 in which said salt is present in solution in water miscible organic solvent medium comprising at least about 10% of an ether alcohol.
Claim 6
Dependent Claim
22 words
An epoxy-phosphate ester polymer salt as recited in claim 4 in which more than 75% of said solvent medium is 2-butoxy ethanol.
Claim 7
Dependent Claim
13 words
A stable aqueous dispersion of the polymer salt solution recited in claim 4.
Claim 8
Dependent Claim
28 words
A stable aqueous dispersion as recited in claim 6 in which said organic solvent is present with respect to water in a weight ratio of 5:95 to 50:50.
Claim 9
Dependent Claim
18 words
A stable aqueous dispersion as recited in claim 7 in which said ratio is from 20:80 to 35:65.
Claim 10
Dependent Claim
29 words
A stable aqueous dispersion as recited in claim 7 in which 5% to 50% of aminoplast or phenoplast resin is included in said dispersion based on total resin solids.
Claim 11
Dependent Claim
40 words
A stable aqueous dispersion as recited in claim 9 in which from 5% to 40% of a water dispersible polyhydric alcohol having a molecular weight of at least about 300 is included in said dispersion based on total resin solids.
Claim 12
Dependent Claim
43 words
A stable aqueous dispersion as recited in claim 9 in which from 0.2-0.5 mol of orthophosphoric acid is used for each oxirane equivalent in said polyepoxide and from 30% to 80% of the initial oxirane content is retained in said monoester reaction product.
Claim 13
Dependent Claim
172 words
A stable aqueous dispersion comprising an epoxy-phosphate ester polymer salt provided by reacting a diglycidyl ether of a bisphenol having an average molecular weight in the range of 2000 to 5000 and a 1,2-epoxy equivalency of from 1.5 to 2.0 with from 0.2 to 0.5 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide to thereby form a monoester reaction product containing from 30% to 80% of its initial oxirane content as residual epoxy functionality, and then reacting the monoester reaction product with at least 2 mols of a volatile amine per equivalent of oxirane functionality in said monoester to provide a water dispersible product lacking oxirane functionality, and then dispersing said water dispersible product in water together with from 5% to 50%, based on total resin solids, of aminoplast or phenoplast resin, said dispersion being effected with the aid of water miscible organic solvent comprising at least about 10% of an ether alcohol to provide organic solvent in a weight ratio with respect to water of 5:95 to 50:50.
Claim 14
Dependent Claim
172 words
A stable aqueous dispersion comprising an epoxy-phosphate ester polymer salt provided by reacting a diglycidyl ether of a bisphenol having an average molecular weight in the range of 2000 to 5000 and a 1,2-epoxy equivalency of from 1.5 to 2.0 with from 0.2 to 0.5 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide to thereby form a monoester reaction product containing from 30% to 80% of its initial oxirane content as residual epoxy functionality, and then reacting the monoester reaction product with at least 2 mols of a volatile amine per equivalent of oxirane functionality in said monoester to provide a water dispersible product lacking oxirane functionality, and then dispersing said water dispersible product in water together with from 5% to 50%, based on total resin solids, of aminoplast or phenoplast resin, said dispersion being effected with the aid of water miscible organic solvent comprising at least about 10% of an ether alcohol to provide organic solvent in a weight ratio with respect to water of 5:95 to 50:50.
Claim 15
Dependent Claim
27 words
A stable aqueous dispersion as recited in claim 12 in which said amine is dimethyl ethanol amine and more than 75% of the solvent is 2-butoxy ethanol.
Claim 16
Independent Claim
103 words
A method of producing a water dispersible epoxy-phosphate ester polymer salt having improved stability in aqueous dispersion in admixture with aminoplast or phenoplast resin comprising reacting a resinous polyepoxide having at least about 1.4 oxirane groups per molecule with less than 0.9 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide to thereby form a monoester reaction product containing at least 10% of its initial oxirane functionality, and then reacting the monoester reaction product so-provided with at least 1 mol of a volatile amine per equivalent of oxirane functionality in said monoester to provide a water dispersible product lacking oxirane functionality.
Claim 17
Independent Claim
103 words
A method of producing a water dispersible epoxy-phosphate ester polymer salt having improved stability in aqueous dispersion in admixture with aminoplast or phenoplast resin comprising reacting a resinous polyepoxide having at least about 1.4 oxirane groups per molecule with less than 0.9 mol of orthophosphoric acid for each oxirane equivalent in the polyepoxide to thereby form a monoester reaction product containing at least 10% of its initial oxirane functionality, and then reacting the monoester reaction product so-provided with at least 1 mol of a volatile amine per equivalent of oxirane functionality in said monoester to provide a water dispersible product lacking oxirane 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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |