Patent US4221647A successfully refreshed from Google Patents.
US4221647A
Expired / Lapsed
US
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Anodic electrocoating compositions
Assignee: Lilly Industries Inc
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Filing: 1979-06-18
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Granted: 1980-09-09
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Expires: 1999-06-18
Abstract
Abstract An electrocoating composition useful for electrocoating a paint coating from an aqueous solution onto an anode electrical conductive substrate. The electrocoating composition is based upon a fatty acid ester and alpha , beta -unsaturated dicarboxylic acid modified styrene-allyl alcohol copolymer further modified with an acid-functional acrylic copolymer. The electrocoated film can be air dried or heat cured.
Inventors
- 👤 Edward T. Turpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:22
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
An anodic aqueous electrocoating process for electrocoating a paint film onto an electrically conductive metal anode substrate, the improvement providing a binder polymer composition comprising on a weight basis on a step-wise basis: (a) providing 20% to 40% of a styrene-allyl alcohol copolymer containing unreacted hydroxyl groups; (b) esterifying 20% to 50% of a fatty acid with a portion of the hydroxyl groups on copolymer (a); (c) esterifying 0% to 3% of α,β-unsaturated dicarboxylic acid or anhydride with a portion of the hydroxyl groups on copolymer (a); and (d) coreacting 20% to 50% of an acid-functional acrylic copolymer by addition polymerization with the fatty acid (b) and the dicarboxylic acid or anhydride (c), and neutralizing said acid-functional groups and dispersing said binder polymer composition in water to provide an aqueous anodic electrocoating composition.
Claim 2
Dependent Claim
133 words
An anodic aqueous electrocoating process for electrocoating a paint film onto an electrically conductive metal anode substrate, the improvement providing a binder polymer composition comprising on a weight basis on a step-wise basis: (a) providing 20% to 40% of a styrene-allyl alcohol copolymer containing unreacted hydroxyl groups; (b) esterifying 20% to 50% of a fatty acid with a portion of the hydroxyl groups on copolymer (a); (c) esterifying 0% to 3% of α,β-unsaturated dicarboxylic acid or anhydride with a portion of the hydroxyl groups on copolymer (a); and (d) coreacting 20% to 50% of an acid-functional acrylic copolymer by addition polymerization with the fatty acid (b) and the dicarboxylic acid or anhydride (c), and neutralizing said acid-functional groups and dispersing said binder polymer composition in water to provide an aqueous anodic electrocoating composition.
References Cited (Backward Citations)
US3650998A
Cited
US3663401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |