Patent US4512860A successfully refreshed from Google Patents.
US4512860A
Expired / Lapsed
US
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Cathodic electrocoating composition compounded with latex binder
Assignee: Akzo Nobel Paints LLC
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Filing: 1983-07-14
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Granted: 1985-04-23
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Expires: 2003-07-14
Abstract
Abstract An improved cathodic electrocoating composition comprises an aqueous suspension of cation-active, film-forming, amino-stabilized synthetic latex binder particles characterized by being practically free of amino monomer and amino initiator fragments and containing not substantially more than about 15% of low molecular weight material including solvents based on the latex solids content.
Inventors
- 👤 Kirk J. Abbey
- 👤 James R. Erickson
- 👤 Barbara L. Kunz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:05
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4407; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
In a method for electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode, an anode, and an aqueous electrodepositable composition wherein net unidirectional electric current is passed through said circuit for causing deposition of said composition on said cathode, the improvement which comprises using as said composition an aqueous suspension of cation-active, film-forming, amino-stabilized synthetic latex binder particles characterized by being practically free of amino monomers and amino initiator fragments and containing not substantially more than about 15% low molecular weight material including solvents based on the latex solids content.
Claim 2
Dependent Claim
97 words
In a method for electrocoating an electrically conductive surface serving as a cathode in an electrical circuit comprising said cathode, an anode, and an aqueous electrodepositable composition wherein net unidirectional electric current is passed through said circuit for causing deposition of said composition on said cathode, the improvement which comprises using as said composition an aqueous suspension of cation-active, film-forming, amino-stabilized synthetic latex binder particles characterized by being practically free of amino monomers and amino initiator fragments and containing not substantially more than about 15% low molecular weight material including solvents based on the latex solids content.
Claim 3
Dependent Claim
9 words
An article coated by the method of claim 1.
Claim 4
Dependent Claim
36 words
A process for improving the electrodeposition of film-forming, cation-active, amino-stabilized synthetic latex which comprises removing therefrom cation-active low molecular weight material by contacting an aqueous dispersion of said latex with ion exchange resin in acid form.
Claim 5
Dependent Claim
36 words
A process for improving the electrodeposition of film-forming, cation-active, amino-stabilized synthetic latex which comprises removing therefrom cation-active low molecular weight material by contacting an aqueous dispersion of said latex with ion exchange resin in acid form.
Claim 6
Dependent Claim
21 words
The process of claim 3 wherein a flow of the latex dispersion is passed through a bed of cation-exchanged resin particles.
Claim 7
Dependent Claim
40 words
The process of claim 3 wherein said latex for the ion-exchanging contains cationic surfactant that is removed thereby, and, after said exchanging, the resulting treated latex is dosed with additional cationic surfactant having molecular weight in excess of about 300.
Claim 8
Dependent Claim
33 words
The method of claim 1 wherein said latex is a copolymer containing acrylate and/or methacrylate monomer units and is structurally cation-active by its containing monomer units that have secondary and/or tertiary amino functionality.
Claim 9
Dependent Claim
19 words
The method of claim 1 wherein said latex has been treated to remove amino monomer and amino initiator fragments.
Claim 10
Dependent Claim
18 words
The method of claim 7 wherein said latex has been ion exchanged with a strongly acidic ion exchanger.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein said aqueous electrodepositable composition contains polyether surfactant.
Claim 12
Dependent Claim
33 words
The method of claim 1 wherein said aqueous electrodepositable composition is acid-ionized, contains about 1-25% binder solids, and the latex present therein has average particle size not substantially smaller than about 1000 Å.
Claim 13
Dependent Claim
41 words
The method of claim 1 wherein said aqueous electrodepositable composition is replenished with a replenishment composition that is like said aqueous electrodepositable composition except that it is richer in binder solids and lower in acid than is said aqueous electrodepositable composition.
Claim 14
Dependent Claim
24 words
The method of claim 1 wherein said aqueous electrodepositable composition includes particulate material in the form of inorganic particles, plastic particles, and/or powder paint.
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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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |