The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 21, 1992
Filed:
May. 11, 1990
Hiroyuki Kishi, Yokohama, JP;
Hitoshi Kimura, Chigasaki, JP;
Katsuya Yamamoto, Yokohama, JP;
Yoshinobu Tamura, Sagamihara, JP;
Tsuneo Sakauchi, Yokohama, JP;
Masahide Nagaoka, Yokohama, JP;
Masaya Kawabata, Yao, JP;
Akitoshi Shirasaka, Kawanishi, JP;
Shinichi Inoue, Osaka, JP;
Makoto Efumi, Narashino, JP;
Shosaku Yamamoto, Yokohama, JP;
Michiaki Wake, Chigasaki, JP;
Masayuki Takemoto, Yokohama, JP;
Naoya Sakai, Yokohama, JP;
Nissan Motor Co., Ltd., Tokyo, JP;
Shinto Paint Co., Ltd, Tokyo, JP;
Nippon Oil & Fats Co., Ltd., Tokyo, JP;
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.