Title:
ELECTRODEPOSITION BATHS CONTAINING CALCIUM SALTS
Document Type and Number:
WIPO Patent Application WO2000003070
Kind Code:
A3
Abstract:
Disclosed are improved electrodeposition bath compositions comprising a resinous phase dispersed in an aqueous medium, the resinous phase being comprised of an active hydrogen containing ionic electrodepositable resin and a curing agent, where the improvement comprises the addition to a lead-free electrodeposition bath of at least one calcium compound in an amount of about 10 to 10,000 parts per million of total calcium and not more than about 200 parts per million soluble calcium, based on electrodeposition bath weight. The electrodeposition bath compositions are preferably cationic and provide for excellent corrosion resistance over a variety of metal substrates including untreated steel. Also disclosed is a method of electrocoating a conductive substrate using the improved electrodeposition bath compositions of the invention. Metallic substrates which are coated using the method of the invention are also disclosed.
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Inventors:
MCMURDIE NEIL D
KAYLO ALAN J
KARABIN RICHARD F
KAYLO ALAN J
KARABIN RICHARD F
Application Number:
PCT/US1999/015000
Publication Date:
October 05, 2000
Filing Date:
July 01, 1999
Export Citation:
Assignee:
PPG IND OHIO INC (US)
International Classes:
C09D5/44; C25D13/10; C25D13/06; (IPC1-7): C25D13/06; C25D13/10
Foreign References:
| US4533683A | 1985-08-06 | |||
| EP0336283A2 | 1989-10-11 | |||
| US5458678A | 1995-10-17 | |||
| EP0554023A1 | 1993-08-04 | |||
| US4042478A | 1977-08-16 | |||
| US3926761A | 1975-12-16 | |||
| EP0096526A2 | 1983-12-21 | |||
| US5718817A | 1998-02-17 | |||
| EP0264834A1 | 1988-04-27 | |||
| US3954693A | 1976-05-04 |
Other References:
See also references of EP 1104493A2
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