Co-Cure Process: Autodeposition Primer and Powder Topcoat Henkel Corporation

Format:

Conference/Event

Author/Creator:

Abu-Shanab, Abu-Shanab, author.

Contributor:

Fristad, William E.

Conference Name:

SAE 2010 World Congress & Exhibition (2010-04-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2010

Summary:

Autodeposition is an immersion, direct-to-metal coating processthat forms a paint film on metal surfaces by a chemical reactionbetween an aqueous paint dispersion and the base metal. Theautodeposition process consists of cleaning, rinsing, organiccoating deposition, and a sealing rinse. Conventionalpretreatment/primer systems require full thermal cure prior totopcoat application because of volatiles that must be lost duringcure. The latest autodeposition chemistry consists of anepoxy-acrylic hybrid mini-emulsion. The chemical combination of aflexible, high molecular weight acrylic with a hard, tough epoxy ina semi-interpenetrating network provides a very low VOC (0.03lb/gal) coating. Upon dehydration ~100°C, the autodeposited coatingprovides a dry-to-handle, tack-free film with physical integrity. Apowder topcoat or sealer/adhesive can be applied to the dehydratedautodeposited coating. Finally, both the primer and topcoat orprimer and sealer/-adhesive are chemically "Co-Cured" ina single oven.This paper describes the autodeposition chemistry, processsequence, and deposition mechanism. It illustrates the innovativemodeling and design of the latest autodeposition chemistry that ledto the implementation of the "Co-Cure" process. Further,it describes the "Co-Cure" process, showing itsperformance, simplicity advantages, and demonstrates itscontribution to a sustainable, lean, and modular paint shop

Notes:

Vendor supplied data

Publisher Number:

2010-01-0235

Access Restriction:

Restricted for use by site license