Electrodeposition coated article and method for producing same
AssigneesMitsubishi Materials Corporation, Mitsubishi Cable Industries, Ltd.
InventorsShintaro Iida, Hideaki Sakurai, Hiroyuki Kamibayashi, Toyokazu Nagato
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Abstract
A method for producing an electrodeposition coated article, in which an insulating film is formed by forming an insulating layer on a surface of an article to be coated according to an electrodeposition method by using an electrodeposition coating material, and then by performing a baking treatment, the electrodeposition coating material contains a solvent containing polyamide imide and an organic solvent added to the electrodeposition coating material, a boiling point of the organic solvent is higher than 100° C., and a Hansen solubility parameter is similar to the polyamide imide and has high compatibility.
Claims18
A method for producing an electrodeposition coated article, in which an insulating film is formed by forming an insulating layer on a surface of an article to be coated according to an electrodeposition method by using an electrodeposition coating material, and then by performing a baking treatment,
- wherein the electrodeposition coating material contains a solvent containing polyamide imide and an organic solvent added to the electrodeposition coating material, and
- a boiling point of the organic solvent is higher than 100° C., and a relationship of D(S−P)<6 is satisfied, D(S−P) being represented by an expression described below,
- D(S−P)=[(dDS−dDP)2+(dPS−dPP)2+(dHS−dHP)2]1/2 (1)
- in the expression, dDS is a dispersion component of an HSP value of an organic solvent, dDP is a dispersion component of an HSP value of polyamide imide, dPS is a polarization component of an HSP value of an organic solvent, dPP is an polarization component of an HSP value of an polyamide imide, dHS is a hydrogen bonding component of an HSP value of an organic solvent, and dHP is a hydrogen bonding component of an HSP value of polyamide imide.
An electrodeposition coated article,
- wherein in an insulating film formed on a surface of an article to be coated, the number of pinholes on a film sectional surface measured by being observed with SEM is less than or equal to 50 items/10 μm square, and surface roughness Ra measured according to JISC0601 is less than or equal to 40 nm.
Dependencies are inferred from the claim text.