Cationic electrodeposition coating composition and method of preparing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 17, 2008
Grant Date -
Jul 28, 2005
app pub date -
Dec 30, 2004
filing date -
Dec 30, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a cationic electrodeposition coating composition and a method of preparing the cationic electrodeposition coating composition, a cationic electrodeposition coating composition is prepared by dispersing a cationic electrodeposition resin in an aqueous medium containing about 0.5 to 3% by weight of zinc acetate. The cationic electrodeposition resin is prepared by reacting about 40 to about 60% by weight of a cationic resin prepared by an epoxy-amino addition reaction, about 2 to about 5% by weight of an acrylic cationic resin having an amino group, and about 30 to about 50% by weight of a polyisocyanate curing agent including partially blocked isocyanate functional groups. The cured film formed on the hard disc driver base frame by using the cationic electrodeposition coating composition contains no heavy metal such as lead or tin, has no appearance defect such as a pinhole and has excellent corrosion-resistance even when being cured at low temperature.
First Claim
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