US4104100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for anodic electrodeposition of aqueous emulsions
Assignee: DeSoto Inc
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Filing: 1976-11-12
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Granted: 1978-08-01
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Expires: 1996-11-12
Abstract
Abstract Monoethylenic monomers are copolymerized in aqueous emulsion in the presence of about 0.5-5% of a polyanionic phosphate-based emulsifying agent to provide a stable aqueous emulsion which electrodeposits at the anode to form a continuous film of high quality.
Inventors
- 👤 Dale F. Anders
- 👤 Peter V. Brizgys
- 👤 Ronald Mattiuz
- 👤 Edward J. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:28
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4407; C09D5/4411
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
77 words
A method for electrodepositing a continuous polymer film on a conductive substrate comprising, passing a unidirectional electrical current through an aqueous bath of emulsion copolymer particles and then through said conductive substrate as anode, said emulsion copolymer particles being provided by aqueous emulsion copolymerization of monoethylenically unsaturated monomers in the presence of about 0.5-5% of the weight of materials subjected to copolymerization, of a polyanionic phosphate-based emulsifying agent, and then withdrawing the coated anode from said bath.
Claim 2
Independent Claim
77 words
A method for electrodepositing a continuous polymer film on a conductive substrate comprising, passing a unidirectional electrical current through an aqueous bath of emulsion copolymer particles and then through said conductive substrate as anode, said emulsion copolymer particles being provided by aqueous emulsion copolymerization of monoethylenically unsaturated monomers in the presence of about 0.5-5% of the weight of materials subjected to copolymerization, of a polyanionic phosphate-based emulsifying agent, and then withdrawing the coated anode from said bath.
Claim 3
Dependent Claim
21 words
A method as recited in claim 1 in which said aqueous emulsion copolymer has a T g below about 10° C.
Claim 4
Dependent Claim
25 words
A method as recited in claim 2 in which said coated anode is air dried or baked at a temperature of less than 300° F.
Claim 5
Dependent Claim
30 words
A method as recited in claim 2 in which said emulsion copolymer has a T g above about 0° C. and said aqueous bath includes a water immiscible coalescing solvent.
Claim 6
Dependent Claim
32 words
A method as recited in claim 4 in which said water immiscible coalescing solvent is present in an amount of from 5-15%, based on the total weight of resin the the bath.
Claim 7
Dependent Claim
22 words
A method as recited in claim 1 in which said aqueous bath contains less than about 10% of water miscible organic solvent.
Claim 8
Dependent Claim
28 words
A method as recited in claim 1 in which said bath includes from 2% to 10% of aminoplast resin, based on the total weight of the emulsion copolymer.
Claim 9
Dependent Claim
25 words
A method as recited in claim 7 in which said emulsion copolymer includes copolymerized monomer providing reactive groups selected from hydroxy, amide and N-methylol groups.
Claim 10
Dependent Claim
29 words
A method as recited in claim 1 in which said emulsion copolymer includes copolymerized carboxyl functional monomer in an amount up to 3% of the weight of the copolymer.
Claim 11
Dependent Claim
29 words
A method as recited in claim 1 in which said aqueous emulsion copolymerization is carried out in the presence of up to 3% mercaptan based on materials being copolymerized.
Claim 12
Dependent Claim
35 words
A method a recited in claim 1 in which said polyanionic phosphate-based emulsifying agent is a neutralized ester reaction product of about 1 mol of phosphroic acid per hydroxy equivalent of a polyoxyethylene-containing nonionic surfactant.
Claim 13
Dependent Claim
16 words
A method as recited in claim 11 in which said neutralization is with a volatile amine.
Claim 14
Dependent Claim
32 words
A method as recited in claim 11 in which said nonionic surfactant is a monohydric hydrophobe oxyethylated with from about 5 to about 50 mols of ethylene oxide per mol of hydrophobe.
Claim 15
Dependent Claim
30 words
A method as recited in claim 13 in which said hydrophobe is selected from phenols and alcohols containing a long chain hydrocarbon group of from 6 to 22 carbon atoms.
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) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |