US3607800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-dispersible polyurethane resins
Assignee: DeSoto Inc
•
Filing: 1969-02-24
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Granted: 1971-09-21
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Expires: 1989-02-24
Abstract
Abstract Water-dispersible polyurethane resins are provided by reacting a resinous polyol with a stoichiometric deficiency of polyisocyanate to provide an hydroxy-functional polyurethane in which carboxyl functionality is generated with a portion of the carboxyl functionality being preferably consumed by reaction with monoepoxide to generate hydroxy ester groups.
Inventors
- 👤 Kazys Sekmakas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:16
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6212; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/30; C08G18/36; C08G18/64; C08G18/6407; C08G18/83; C08G18/831
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
31 words
A polyurethane resin as recited in claim 1 in which said carboxyl groups are generated by reacting a portion of the hydroxy groups provided by said polyol with polycarboxylic acid monoanhydride.
Claim 2
Dependent Claim
27 words
A polyurethane resin as recited in claim 2 in which said resinous polyol is provided by reacting a resinous polyepoxide with a stoichiometric proportion of monocarboxylic acid.
Claim 3
Dependent Claim
19 words
A polyurethane resin as recited in claim 3 in which said monocarboxylic acid is a frosting oil fatty acid.
Claim 4
Dependent Claim
39 words
A polyurethane resin as recited in claim 1 in which said polyurethane includes carboxyl groups providing an acid number of from about 20 to about 120 and said reaction with monoepoxide lowers the acid number to below about 30.
Claim 5
Dependent Claim
28 words
A polyurethane resin as recited in claim 1 in which said resinous polyol is a bisphenol-based resinous polyepoxide having a molecular weight of about 400 to about 2,000.
Claim 6
Dependent Claim
29 words
A polyurethane resin as recited in claim 1 in which said monoepoxide is selected from the group consisting of C2-C4 mono-oxides and glycidyl esters of alpha-branched saturated monocarboxylic acids.
Claim 7
Dependent Claim
107 words
A polyurethane resin dispersible in water with the aid of a base producing by reacting a resinous polyol of relatively low molecular weight with an organic diisocyanate in a ratio of hydroxy to isocyanate of from 2:1 to 50:1, said polyurethane resin including carboxyl groups generated by reacting a portion of the hydroxy groups provided by said polyol with polycarboxylic acid monoanhydride to provide an acid number of from about 20 to about 120, a portion of said carboxyl groups being converted to hydroxy ester groups by reaction with monoepoxide free of functional groups which would interfere with the reaction between the carboxyl groups and the monoepoxide.
Claim 8
Dependent Claim
29 words
A polyurethane resin as recited in claim 8 in which said resinous polyol is provided by reacting a resinous polyepoxide with a stoichiometric proportion of drying oil fatty acid.
Claim 9
Dependent Claim
41 words
A polyurethane resin as recited in claim 9 in which said drying oil fatty acid is a frosting oil fatty acid and the ratio of hydroxy groups in said resinous polyol to isocyanate groups in said diisocyanate is less than 15:1.
Claim 10
Dependent Claim
33 words
An aqueous electrocoating bath comprising the polyurethane resin of claim 8 dispersed in water with the aid of a base and providing a resin solids content of from 1-20 percent by weight therein.
Claim 11
Dependent Claim
77 words
A nongelled polyurethane resin produced by reacting a resinous polyepoxide having a molecular weight in the range of from about 300 to about 4,000 with a stoichiometric proportion of frosting oil fatty acid to provide an epoxy ester polyol, said polyol being reacted with a stoichiometric deficiency of organic diisocyanate in a ratio of hydroxy to isocyanate of from 2:1 to 50:1 and with a polycarboxylic acid monoanhydride to provide an hydroxy functional polyurethane including carboxyl functionality.
Claim 12
Dependent Claim
45 words
A polyurethane resin as recited in claim 12 in which a portion of the carboxyl groups of said polyurethane are reacted with monoepoxide free of functional groups which would interfere with the reaction between the carboxyl groups and the monoepoxide to generate hydroxy ester groups.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |