Composite paint film coating
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 21, 1992
Grant Date -
N/A
app pub date -
May 11, 1990
filing date -
May 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite paint film coating formed on a steel sheet of an automotive vehicle body. The composite paint film coating is comprised of an electrodeposition paint film (I) coated on the steel sheet, and an intermediate paint film (II) coated on the first paint film. The electrodeposition paint film has a minimum melt viscosity not less than 0.2 during hardening. The electrodepositon paint film is formed of cathodic electrodeposition paint composition which includes a cationic thermosetting resin (1), and an already cross-linked particulate resin (2). The particlate resin is an addition-polymer formed between a fist compound (A) having at least two primary amino groups in a molecule, and a second compound (B) having at least two .alpha.,.beta.-ethylenic unsaturated groups. The particulate resin has an average particle size ranging from 0.01 to 1 .mu.m. The weight ratio ((2)/(1)) in solid content between the particulate resin (2) cationic thermosetting resin (1) is within a range from 0.03 to 0.15. The intermediate paint film (II) has hardening starting time ranging from 5 to 20 minutes.
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Cited Art Landscape
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