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Title:
カチオン電着塗料組成物の調製方法
Document Type and Number:
Japanese Patent JP6441126
Kind Code:
B2
Abstract:
The objective of the present invention is to provide a method for preparing a cationic electrodeposition coating composition that contains a bismuth compound and exhibits excellent coating material stability, curability, coating film appearance and the like. The present invention provides a method for preparing a cationic electrodeposition coating composition, which comprises a step for mixing a resin emulsion (i) and a pigment-dispersed paste, and wherein: the resin emulsion (i) contains an aminated resin (A) and a blocked isocyanate curing agent (B); the pigment-dispersed paste contains a bismuth mixture (C) that is obtained by mixing a bismuth compound (c1) and an organic acid (c2) in advance, a pigment-dispersed resin (D), an amine-modified epoxy resin emulsion (ii) that contains an amine-modified epoxy resin (E), and a pigment (F); the pigment-dispersed resin (D) has a hydroxyl number of 20-120 mgKOH/g; and the amine-modified epoxy resin (E) has a hydroxyl number of 150-650 mgKOH/g.

Inventors:
Mihiro Maehiro
Masayuki Otani
Tetsuya Ohara
Application Number:
JP2015044622A
Publication Date:
December 19, 2018
Filing Date:
March 06, 2015
Export Citation:
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Assignee:
Nippon Paint Automotive Coatings Co., Ltd.
International Classes:
C09D163/00; C09D5/44; C09D7/65; C09D175/04; C25D13/06
Domestic Patent References:
JP201356961A
JP2004339524A
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Tsuyoshi Sato
Yuko Goto