C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 15/00 (2006.01) B05D 7/00 (2006.01)
Patent
CA 2167657
The present invention provides a method for film formation, which comprises applying onto a sub- strate an electrocoating (A) and an intermediate coating (B) in this order, heat-curing the formed films of the coatings (A) and (B), applying thereon a liquid deep color coating (C) which comprises 100 parts by weight of a thermosetting resin composition, 0.1-30 parts by weight of an aluminum powder having an average particle diameter of 10 µ or less, 1-100 parts by weight of a titanium oxide pigment and 0.1-10 parts by weight of a carbon black pigment and which shows a film hiding power of 25 µ or less and a film elongation ratio of 10-50% at 20 °C , a liquid color clear coating (D) which comprises a thermosetting resin composition and a color pigment as the main components and which shows a film hiding power of 50 µ or more and a film elongation ratio of 10% or less at 20 °C , and a clear coating (E) in this order on a wet-on-wet basis, and heating the formed films of the coatings (C), (D) and (E) to crosslink and cure the three films simultaneously. According to the method, part of the heat-curing steps employed in multilayer film formation can be eliminated and a multilayer film of smaller thickness and improved properties (e.g. improved surface smoothness and chipping resistance) can be obtained.
Mizutani Yutaka
Nakamura Shigeru
Ozaki Toru
Shibata Terukazu
Kansai Paint Co. Ltd.
Smart & Biggar
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