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Patent US4425467A successfully refreshed from Google Patents.
US4425467A
Expired / Lapsed
US
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Method of preparing electrophorettable polymer emulsions
Assignee: Westinghouse Electric Corp
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Filing: 1982-01-21
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Granted: 1984-01-10
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Expires: 2002-01-21
Abstract
Abstract Disclosed is a method of making a non-aqueous emulsion from which a polymer can be electrodeposited. A mixture is prepared of about 50 to about 150 parts by weight of a non-aqueous organic, non-electrolizable, non-solvent for the polymer with about 0.8 to about 1.2 parts by weight of a nitrogen-containing base which can be a tertiary amine, an imidazole, or mixture of a tertiary amine and an imidazole. To the mixture is added a solution of 1 part by weight of the polymer which can be a polyamic acid, a polyamide imide, a polyimide, a polyparabanic acid, a polysulfone, or a mixture of these polymers. The polymer is in a non-aqueous, organic, non-electrolizable aprotic solvent such as N-methyl-2-pyrrolidone.
Inventors
- 👤 William M. Alvino
- 👤 Timothy J. Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:47
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4461; C08; C08J; C08J3/00; C08J3/02; C08J3/09; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
109 words
A method of making a non-aqueous emulsion from which a polymer can be electrodeposited comprising: (A) preparing a mixture about 50 to about 150 parts by weight of a non-aqueous organic non-electrolizable non-solvent for said polymer with about 0.8 to about 1.2 parts by weight of a nitrogen-containing base, selected from the group consisting of tertiary amines, imidazoles, and mixtures thereof, (B) adding to said mixture a solution of about 0.5 to about 5% solids containing 1 part by weight of said polymer, said polymer being selected from the group consisting of polyamic acids, polyamide-imides, polyimides, polyparabanic acids, polysulfones, and mixtures thereof, in a non-aqueous, organic, non-electrolizable, aprotic solvent.
Claim 2
Independent Claim
109 words
A method of making a non-aqueous emulsion from which a polymer can be electrodeposited comprising: (A) preparing a mixture about 50 to about 150 parts by weight of a non-aqueous organic non-electrolizable non-solvent for said polymer with about 0.8 to about 1.2 parts by weight of a nitrogen-containing base, selected from the group consisting of tertiary amines, imidazoles, and mixtures thereof, (B) adding to said mixture a solution of about 0.5 to about 5% solids containing 1 part by weight of said polymer, said polymer being selected from the group consisting of polyamic acids, polyamide-imides, polyimides, polyparabanic acids, polysulfones, and mixtures thereof, in a non-aqueous, organic, non-electrolizable, aprotic solvent.
Claim 3
Dependent Claim
12 words
A method according to claim 1 wherein said non-solvent is a ketone.
Claim 4
Dependent Claim
11 words
A method according to claim 2 wherein said ketone is acetone.
Claim 5
Dependent Claim
11 words
A method according to claim 1 wherein said non-solvent is acetonitrile.
Claim 6
Dependent Claim
11 words
A method according to claim 1 wherein said solvent is N-methyl-2-pyrrolidone.
Claim 7
Dependent Claim
12 words
A method according to claim 1 wherein said nitrogen-containing base is triethylamine.
Claim 8
Dependent Claim
16 words
A method according to claim 1 wherein said emulsion is about 29 to about 37% solvent.
Claim 9
Dependent Claim
12 words
A method according to claim 1 wherein said polymer is a polyimide.
Claim 10
Dependent Claim
13 words
A method according to claim 1 wherein said polymer is a polyamic acid.
Claim 11
Dependent Claim
12 words
A method according to claim 1 wherein said polymer is a polyamide-imide.
Claim 12
Dependent Claim
13 words
A method according to claim 1 wherein said polymer is a polyparabanic acid.
Claim 13
Dependent Claim
12 words
A method according to claim 1 wherein said polymer is a polysulfone.
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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |