Coating processes – Direct application of electrical – magnetic – wave – or... – Electrostatic charge – field – or force utilized
Patent
1998-08-27
2000-02-15
Parker, Fred J.
Coating processes
Direct application of electrical, magnetic, wave, or...
Electrostatic charge, field, or force utilized
427475, 427485, 427486, 428416, B05D 106
Patent
active
060250356
ABSTRACT:
This invention relates to a method for forming a coating film which comprises applying an epoxy resin powder coating (A) onto a substrate by electrostatic coating, half-baking the resultant uncured coat, applying a polyester resin powder coating (B) onto the half-baked coat by electrostatic coating, and baking the two uncured coats simultaneously, wherein the epoxy resin powder coating (A) and the polyester resin powder coating (B) is such that the gel time ratio [epoxy resin powder coating (A)]/[polyester resin powder coating (B)] at 180.degree. C. is 1/1 through 1/5, the gel time of the epoxy resin powder coating (A) at 180.degree. C. is 40 to 400 seconds, and the gel time of the polyester resin powder coating (B) at 180.degree. C. is not over 500 seconds.
REFERENCES:
patent: 5334631 (1994-08-01), Durand
patent: 5552191 (1996-09-01), Horinka et al.
patent: 5747150 (1998-05-01), Yamamoto et al.
Oda Hiroshi
Seo Shinji
Uemura Kazuyoshi
Nippon Paint Co. Ltd.
Parker Fred J.
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