Patent Number: 6,333,372

Title: Water-based primer composition for fluororesin coating

Abstract: an aqueous primer composition for a fluororesin coating comprising a fluororesin, polyethersulfone, and at least one resin selected from the group consisting of polyamideimide and polyimide, which are dispersed in water, wherein a weight ratio of polyethersulfone to polyamideimide and/or polyimide is from 85:15 to 65:35, and a weight ratio of the total amount of polyethersulfone and polyamideimide and/or polyimide to the fluororesin is from 15:85 to 35:65. This primer composition has good adhesion properties to substrates, the freedom of color tone of the coated film, and improved corrosion resistance and steam resistance, causes no environmental problems, and has good workability.

Inventors: Tomihashi; Nobuyuki (Settsu, JP), Ogita; Koichiro (Settsu, JP), Sanemasa; Hisato (Settsu, JP)

Assignee: Daikin Industries, Ltd.

International Classification: C09D 127/12 (20060101); C09D 5/00 (20060101); C08L 81/00 (20060101); C08L 79/00 (20060101); C08L 81/06 (20060101); C08L 79/08 (20060101); C08L 079/08 (); C08L 027/12 ()

Expiration Date: 12/25/2018