Patent US4056493A successfully refreshed from Google Patents.
US4056493A
Expired / Lapsed
US
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Trimellitic anhydride modified urethane electrocoating resins
Assignee: EIDP Inc
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Filing: 1974-03-04
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Granted: 1977-11-01
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Expires: 1994-03-04
Abstract
Abstract A novel coating bath composition for anodic deposition of paint comprises on a pigment and particulate filler-free basis, an aqueous dispersion of a water-soluble base, and a unique polycarboxylic acid formed by (a) reacting 1 molar part of a triol with 1 molar part of an acyclic, olefinically unsaturated monocarboxylic acid of about 18 carbon atoms, (b) reacting the product of (a) with 2 molar parts of a diisocyanate, (c) reacting the product of (b) with 2 molar parts of a diol or triol, and (d) reacting the product of (c) with about 0.5 to about 2 molar parts of trimellitic anhydride.
Inventors
- 👤 Ivan H. Tsou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/28; C08G18/30; C08G18/36; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
In a bath composition for electrodepositing paint on an anode and comprising on a pigment and particulate fillerfree basis an aqueous dispersion of a film-forming, polycarboxylic acid paint binder resin at least partially neutralized with water-soluble base, the improvement wherein said polycarboxylic acid paint binder resin is formedby: a. reacting 1 molar part of glycerine with 1 molar part of an acyclic, olefinically unsaturated monocarboxylic fatty acid of about 18 carbon atoms at a temperature of about 230° C. b. reacting the product of (a) with 2 molar parts of toluene diisocyanate at a temperature of about 75° C., c. reacting the product of (b) with 2 molar parts of diethylene glycol at a temperature of about 75° C., and d. reacting the product of (c) with about 0.5 to about 2 molar parts of trimellitic anhydride at a temperature of about 165° C.
Claim 2
Dependent Claim
144 words
In a bath composition for electrodepositing paint on an anode and comprising on a pigment and particulate fillerfree basis an aqueous dispersion of a film-forming, polycarboxylic acid paint binder resin at least partially neutralized with water-soluble base, the improvement wherein said polycarboxylic acid paint binder resin is formedby: a. reacting 1 molar part of glycerine with 1 molar part of an acyclic, olefinically unsaturated monocarboxylic fatty acid of about 18 carbon atoms at a temperature of about 230° C. b. reacting the product of (a) with 2 molar parts of toluene diisocyanate at a temperature of about 75° C., c. reacting the product of (b) with 2 molar parts of diethylene glycol at a temperature of about 75° C., and d. reacting the product of (c) with about 0.5 to about 2 molar parts of trimellitic anhydride at a temperature of about 165° C.
References Cited (Backward Citations)
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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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |