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:
Sep. 15, 2020
Filed:
Mar. 29, 2018
Nippon Paint Automotive Coatings Co., Ltd., Hirakata-shi, Osaka, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Takayuki Kawabata, Hirakata, JP;
Akira Yamazaki, Hirakata, JP;
Masako Hase, Toyota, JP;
Keiji Ambo, Miyoshi, JP;
Yoshinori Narita, Toyota, JP;
NIPPON PAINT AUTOMOTIVE COATINGS CO., LTD., Hirakata-shi, Osaka, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
The coating film formed on an automobile body has softness during a film formation even on a thermally expandable/shrinkable base, and the cured film has an excellent appearance. Provided is a method for forming a multilayer coating film, the method comprises: applying an aqueous intermediate coating composition and preheating the applied composition at 60 to 90° C. to form an uncured film; preheating to form an uncured base coating film and a clear coating film; and baking and curing these uncured films to form a multilayer coating film, wherein the aqueous intermediate coating composition comprises (a) an acrylic resin emulsion having a specific properties, and (b) a film formation auxiliary agent that is a fatty acid diester compound having a boiling point of 280° C. to 350° C., and a cured film comprising (a) and (b) at a mass ratio of 3:1 has a rupture elongation of 1% or more.