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Super environment-friendly electrodeposition paint
Authors:Toshitaka Kawanami   Ichiro Kawakami   Hiroyuki Sakamoto  Hitoshi Hori
Affiliation:

Nippon Paint Co. Ltd., Automotive Coatings T-Project, 19-17 Ikedanaka-machi, Neyagawa-city, Osaka, 572-8501, Japan

Abstract:Super low VOC due to new composition/reaction mechanism can minimize the environmental risk as it does not contain lead and tin, hazardous air pollutants (HAPs) and endocrine disrupters (EPA/67 items, SPEED’98/JEA/67 items) currently specified as contaminants. New EAD (electrolyzed activate deposition paint) is not the only conventional cure agent or solvent, but also the super low VOC, HAPs materials and endocrine disrupters. The electric energy used by EAD is utilized for the reaction but not for the deposition. EAD consists of two technologies. One is propargyl group change to the allene by using electrodeposition. Propargyl group is stable, but allene group is highly polymerizing. As a result, EAD had high bath stability. The other is sulfonium change to sulfide by using electrodeposition. This sulfonium salt is lost as a result of the electrolytic reduction, and hence can be irreversibly rendered non-conductive. As a result, EAD showed high throwing power.
Keywords:Electrodeposition paint   Super low VOC   HAPs
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