US3882009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of isothiouronium stabilized lyophobic colloids
Assignee: Dow Chemical Co
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Filing: 1973-08-29
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Granted: 1975-05-06
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Expires: 1993-08-29
Abstract
Abstract A method for electrodeposition of an organic material on an electroconductive surface comprising placing the electroconductive surface to be coated in contact with an aqueous dispersion containing a water-insoluble, essentially electrically non-conductive, film-forming, organic polymer as cation-active particles wherein a substantial portion of the cation-activity is provided by isothiouronium cations and passing an electric current from an electrode through the latex to the electroconductive surface in such a direction that the electroconductive surface is negatively charged, i.e., becomes a cathode in an electrophoretic cell. By use of alternating current both electrodes become coated with the polymer.
Inventors
- 👤 Earl H Wagener
- 👤 Ritchie A Wessling
- 👤 Dale S Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4407
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
14 words
A METHOD FOR APPLYING A COATING TO AN OBJECT HAVING AN ELECTROCONDUCTIVE SURFACE COMPRISING
Claim 2
Independent Claim
14 words
A METHOD FOR APPLYING A COATING TO AN OBJECT HAVING AN ELECTROCONDUCTIVE SURFACE COMPRISING
Claim 3
Dependent Claim
61 words
IMMERSING THE OBJECT IN A COATING BATH COMPRISING A LATEX HAVING A PH IN THE RANGE FROM ABOUT 2 TO ABOUT 12 OF CATION-ACTIVE PARTICLES OF WATER-INSOLUBLE, ESSENTIALLY ELECTRICALLY NON-CONDUCTIVE, ORGANIC, FILM-FORMING POLYMER WHEREIN A SUBSTANTIAL PORTION OF THE CATION-ACTIVITY IS PROVIDED BY ISOTHIOURONIUM CATIONS; SAID LATEX HAVING A CONDUCTIVITY OF FROM ABOUT 300 MICROMHOS TO ABOUT 3,500 MICROMHOS PER CENTIMETER;
Claim 4
Dependent Claim
61 words
IMMERSING THE OBJECT IN A COATING BATH COMPRISING A LATEX HAVING A PH IN THE RANGE FROM ABOUT 2 TO ABOUT 12 OF CATION-ACTIVE PARTICLES OF WATER-INSOLUBLE, ESSENTIALLY ELECTRICALLY NON-CONDUCTIVE, ORGANIC, FILM-FORMING POLYMER WHEREIN A SUBSTANTIAL PORTION OF THE CATION-ACTIVITY IS PROVIDED BY ISOTHIOURONIUM CATIONS; SAID LATEX HAVING A CONDUCTIVITY OF FROM ABOUT 300 MICROMHOS TO ABOUT 3,500 MICROMHOS PER CENTIMETER;
Claim 5
Dependent Claim
55 words
PASSING AN ELECTRIC CURENT THROUGH SAID BATH SUFFICIENT TO EFFECT DEPOSITION OF COATING OF SAID POLYMER ON THE OBJECT BY PROVIDING A DIFFERENCE OF ELECTRICAL POTENTIAL BETWEEN THE OBJECT AND AN ELECTRODE THAT IS A. SPACED APART FROM SAID OBJECT B. IN ELECTRICAL CONTACT WITH SAID BATH C. ELECTRICALLY POSITIVE IN RELATION TO SAID OBJECT.
Claim 6
Dependent Claim
55 words
PASSING AN ELECTRIC CURENT THROUGH SAID BATH SUFFICIENT TO EFFECT DEPOSITION OF COATING OF SAID POLYMER ON THE OBJECT BY PROVIDING A DIFFERENCE OF ELECTRICAL POTENTIAL BETWEEN THE OBJECT AND AN ELECTRODE THAT IS A. SPACED APART FROM SAID OBJECT B. IN ELECTRICAL CONTACT WITH SAID BATH C. ELECTRICALLY POSITIVE IN RELATION TO SAID OBJECT.
Claim 7
Dependent Claim
56 words
passing an electric current through said bath sufficient to effect deposition of a coating of said polymer on the object by providing a difference of electrical potential between the object and an electrode that is a. spaced apart from said object b. in electrical contact with said bath c. electrically positive in relation to said object.
Claim 8
Dependent Claim
56 words
passing an electric current through said bath sufficient to effect deposition of a coating of said polymer on the object by providing a difference of electrical potential between the object and an electrode that is a. spaced apart from said object b. in electrical contact with said bath c. electrically positive in relation to said object.
Claim 9
Dependent Claim
13 words
The method of claim 1 in which the electric current is direct current.
Claim 10
Dependent Claim
27 words
The process of claim 1 in which the aqueous dispersion has a solids content of from about 2 per cent to about 15 per cent by weight.
Claim 11
Dependent Claim
21 words
The process of claim 1 in which the dispersion is maintained at a pH of from about 6 to about 10.
Claim 12
Dependent Claim
24 words
The process of claim 1 in which the conductivity of the aqueous dispersion is from about 600 micromhos to about 1,800 micromhos per centimeter.
Claim 13
Dependent Claim
22 words
The process of claim 1 in which the aqueous dispersion contains a supporting electrolyte in a concentration up to about 0.1 normal.
Claim 14
Dependent Claim
16 words
The process of claim 1 in which some of the cation-activity is provided by sulfonium cations.
Claim 15
Dependent Claim
12 words
The process of claim 1 in which isothiouronium cation has the formula
Claim 16
Dependent Claim
17 words
The process of claim 1 in which the isothiouronium cation is provided by an adsorbed isothiouronium compound.
Claim 17
Dependent Claim
13 words
The process of claim 9 in which the isothiouronium compound has the formula
References Cited (Backward Citations)
US3497440A
Cited
US3567613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |