US4253930A
Expired / Lapsed
US
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Process for electrodepositing cationic compositions
Assignee: Nippon Paint Co Ltd
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Filing: 1979-07-16
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Granted: 1981-03-03
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Expires: 1999-07-16
Abstract
Abstract A resin useful for electrocoating is obtained by reacting a reaction product of an epoxy group-containing compound with a carboxyl group-containing butadiene/acrylonitrile copolymer with simultaneously or separately an amino group-containing compound and a fully or a partially blocked isocyanato group-containing compound, and a composition comprising said resin or a composition comprising a reaction product obtained by reacting a reaction product of an epoxy group-containing compound and a carboxyl group-containing butadiene/acrylonitrile copolymer with an amino group-containing compound and a fully or partially blocked isocyanato group-containing compound is used for a cathodical electrodeposition.
Inventors
- 👤 Yasuyuki Tsuchiya
- 👤 Akio Ichikawa
- 👤 Kastuyoshi Yamasoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4465; C09D5/4403; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31605; Y10T428/31678
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
In a method of coating a conductive substrate serving as a cathode which method comprises passing an electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising a resin obtained by reacting a reaction product (A) of an epoxy group-containing compound with a carboxyl group-containing butadiene/acrylonitrile copolymer at the rate of 1 epoxy equivalent of the former to about 0.2 to 0.7 equivalent of the free carboxyl group of the latter with simultaneously or separately an amino group-containing compound and a partially blocked isocyanato group-containing compound.
Claim 2
Dependent Claim
92 words
In a method of coating a conductive substrate serving as a cathode which method comprises passing an electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising a resin obtained by reacting a reaction product (A) of an epoxy group-containing compound with a carboxyl group-containing butadiene/acrylonitrile copolymer at the rate of 1 epoxy equivalent of the former to about 0.2 to 0.7 equivalent of the free carboxyl group of the latter with simultaneously or separately an amino group-containing compound and a partially blocked isocyanato group-containing compound.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein the epoxy group-containing compound is a 1,2-epoxy group-containing compound having an epoxy equivalent of about 300 to 1000.
Claim 4
Dependent Claim
57 words
The method according to claim 1, wherein the carboxyl group-containing butadiene/acrylonitrile copolymer contains about 8 to 30% by weight of an acrylonitrile moiety and has the average number of carboxyl group of about 1.5 to 2.5 in a molecule and the number average molecular weight of about 1000 to 4000; said carboxyl group may be partially esterified.
Claim 5
Dependent Claim
32 words
The method according to claim 1, wherein the resin is that obtained by first reacting an isocyanato group-containing compound with the reaction product (A) and then reacting an amino group-containing compound therewith.
Claim 6
Dependent Claim
32 words
The method according to claim 1, wherein the resin is that obtained by first reacting an amino group-containing compound with the reaction product (A) and then reacting an isocyanato group-containing compound therewith.
Claim 7
Dependent Claim
15 words
The method according to claim 1, wherein the amino group-containing compound contains an active hydrogen.
Claim 8
Dependent Claim
24 words
The method according to claim 1, wherein the amino group-containing compound, in case of having no active hydrogen, is used as an acid salt.
Claim 9
Dependent Claim
33 words
The method according to claim 1, wherein the resin is that obtained by reacting the reaction product (A) with a reaction product (B) of an isocyanato group-containing compound and an amino group-containing compound.
Claim 10
Dependent Claim
30 words
The method according to claim 8, wherein the reaction product (B), in case of having no active hydrogen attributed to the amino group-containing compound, is used as an acid salt.
Claim 11
Dependent Claim
10 words
The electrocoated substrate produced by the method of claim 1.
Claim 12
Dependent Claim
94 words
In a method of coating a conductive substrate serving as a cathode which method comprises passing an electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising (1) a reaction product obtained by reacting a reaction product (A) of an epoxy group-containing compound and a carboxyl group-containing butadiene/acrylonitrile copolymer at the rate of 1 epoxy equivalent of the former to about 0.2 to 0.7 equivalent of the free carboxyl group of the latter with an amino group-containing compound, and (2) a fully or partially blocked isocyanato group-containing compound.
Claim 13
Dependent Claim
94 words
In a method of coating a conductive substrate serving as a cathode which method comprises passing an electric current between an anode and said cathode in electrical contact with a water-dispersed composition comprising (1) a reaction product obtained by reacting a reaction product (A) of an epoxy group-containing compound and a carboxyl group-containing butadiene/acrylonitrile copolymer at the rate of 1 epoxy equivalent of the former to about 0.2 to 0.7 equivalent of the free carboxyl group of the latter with an amino group-containing compound, and (2) a fully or partially blocked isocyanato group-containing compound.
Claim 14
Dependent Claim
22 words
The method according to claim 11, wherein the epoxy group-containing compound is 1,2-epoxy group-containing compound having about 300 to 1000 epoxy equivalents.
Claim 15
Dependent Claim
56 words
The method according to claim 11, wherein the carboxyl group-containing butadiene/acrylonitrile copolymer contains about 8 to 30% by weight of acrylonitrile moiety and has the average carboxyl group number of about 1.5 to 2.5 and the number average molecular weight of about 1000 to 4000 in a molecule, and said caroxyl group may be partially esterified.
Claim 16
Dependent Claim
42 words
The method according to claim 11, wherein the composition is obtained by blending the fully blocked isocyanato group-containing compound with the reaction product (A) and/or the amino group-containing compound before the reaction of the reaction product (A) with the amino group-containing compound.
Claim 17
Dependent Claim
10 words
The electrocoated substrate produced by the method of claim 11.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |