EP0469491A2
Expired / Lapsed
EP
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Low temperature curable anionic electrodepositable compositions
Assignee: PPG Industries Ohio Inc
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Filing: 1991-07-27
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Granted: —
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Expires: 2011-07-27
Abstract
Abstract Disclosed herein is a heat curable anionic electrodepositable composition comprising an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) greater than about 50 percent on a solids basis of a phosphated epoxy resin and (b) an aminoplast resin having a combination of low alkoxy and high alkoxy groups. Also disclosed is a process for coating a conductive substrate which includes electrodepositing a base-neutralized resinous composition containing an effective combination of at least about 50 percent of a phosphated epoxy resin on a resin solids basis, and an aminoplast resin followed by heating the substrate to a temperature of less than 225 F over 20 to 60 minutes. The disclosed composition is particuarly useful for coating heat sensitive substrates because acceptable cure is attained at temperatures of less than 225 F.
Inventors
- 👤 James E. Jones
- 👤 Jerome A. Seiner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:59
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4453; C08; C08G; C08G59/00; C08G59/14; C08G59/1405; C08G59/1422; C09D163/00; C09D5/4434
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
53 words
A low temperature curable ultrafiltration insensitive anionic electrodepositable composition comprising an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis, (b) an aminoplast resin having a combination of low alkoxy and high alkoxy groups.
Claim 2
Dependent Claim
53 words
A low temperature curable ultrafiltration insensitive anionic electrodepositable composition comprising an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis, (b) an aminoplast resin having a combination of low alkoxy and high alkoxy groups.
Claim 3
Dependent Claim
28 words
The low temperature curable anionic electrodepositable composition of claim 1 wherein the aminoplast is present in an amount of 10 to 50 percent based on total resin solids.
Claim 4
Dependent Claim
16 words
The low temperature curable anionic electrodepositable composition of claim 1 which further comprises a coalescing agent.
Claim 5
Dependent Claim
42 words
The low temperature curable anionic electrodepositable composition of claim 1 wherein the phosphated epoxy resin is derived from an epoxy resin selected from the group consisting of polyglycidyl ethers of polyphenols, an epoxy functional acrylic resin, a novolac resin or mixtures thereof.
Claim 6
Dependent Claim
24 words
The low temperature curable anionic electrodepositable composition of claim 1 wherein the phosphated epoxy resin is derived from phosphated epoxy functional ethylenically unsaturated monomers.
Claim 7
Dependent Claim
79 words
The low temperature curable anionic electrodepositable composition of claim 1 wherein the low alkoxy group has less than 3 carbon atoms and the high alkoxy group has 3 or more carbon atoms. 1 films coated at 210 volts at 90°F for 90 seconds with 1.0-1.10 mil films obtained. 2 polished zinc phosphated steel with Parcolene® 60 and deionized water rinse available from Parker Chemical Company. 3 CIE Publication No. 15.2, Colorimetry , Bureau Central de la CIE, Vienna (1986)
Claim 8
Dependent Claim
22 words
The low temperature curable anionic electrodepositable composition of claim 6 wherein the low alkoxy group is a methoxy or an ethoxy group.
Claim 9
Dependent Claim
22 words
The low temperature curable anionic electrodepositable composition of claim 6 wherein the high alkoxy group is a propoxy or a butoxy group.
Claim 10
Dependent Claim
16 words
The low temperature curable anionic electrodepositable composition of claim 1 which further comprises a phenolic resin.
Claim 11
Dependent Claim
16 words
The low temperature curable anionic electrodepositable composition of claim 1 which further comprises an acrylic resin.
Claim 12
Dependent Claim
87 words
A process for providing a coating on a conductive substrate at a low temperature comprising passing an electric current between the substrate acting as an anode, and cathode in contact with an electrodeposition bath containing an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis; and (b) an aminoplast resin, followed by heating the substrate to a temperature of less than 225 F over 20 to 60 minutes.
Claim 13
Dependent Claim
87 words
A process for providing a coating on a conductive substrate at a low temperature comprising passing an electric current between the substrate acting as an anode, and cathode in contact with an electrodeposition bath containing an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis; and (b) an aminoplast resin, followed by heating the substrate to a temperature of less than 225 F over 20 to 60 minutes.
Claim 14
Dependent Claim
15 words
A process, as claimed in claim 11, wherein said composition further comprises an acrylic resin.
Claim 15
Dependent Claim
23 words
A process, as claimed in claim 11, wherein the aminoplast is present in an amount of 10 to 50 percent total resin solids.
Claim 16
Dependent Claim
21 words
A process, as claimed in claim 11, wherein said aminoplast resin has a combination of low alkoxy and high alkoxy groups.
Claim 17
Dependent Claim
25 words
A process, as claimed in claim 14, wherein said low alkoxy groups are methoxy or ethoxy and said high alkoxy groups are propoxy or butoxy.
Claim 18
Dependent Claim
15 words
A process, as claimed in claim 11, wherein said composition further comprises a phenolic resin.
Claim 19
Dependent Claim
13 words
An article of matter which is prepared by the process of claim 11.
Claim 20
Dependent Claim
101 words
A process for controlling color change of a coating on a conductive substrate at a low temperature comprising passing an electric current between a cathode and the substrate acting as an anode, in contact with an electrodeposition bath containing an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis, (b) an aminoplast resin having a combination of low alkoxy and high alkoxy groups. followed by heating the substrate to a temperature of 180° F to 350 F over 20 to 60 minutes.
Claim 21
Dependent Claim
101 words
A process for controlling color change of a coating on a conductive substrate at a low temperature comprising passing an electric current between a cathode and the substrate acting as an anode, in contact with an electrodeposition bath containing an aqueous dispersion of a base-neutralized resinous composition containing an effective combination of: (a) at least about 50 percent of a phosphated epoxy resin on a resin solids basis, (b) an aminoplast resin having a combination of low alkoxy and high alkoxy groups. followed by heating the substrate to a temperature of 180° F to 350 F over 20 to 60 minutes.
Claim 22
Dependent Claim
13 words
An article of matter which is prepared by the process of claim 18.
References Cited (Backward Citations)
No citation records indexed.
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