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Patent Searching and Data


Title:
EPOXY RESIN AND ELECTRODEPOSITION COATING
Document Type and Number:
WIPO Patent Application WO/2021/193635
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an epoxy resin having exceptional storage stability and curability when a low-activity catalyst is used and at low temperature, and also having exceptional corrosion resistance and coating film finish when made into a coating. The present invention also addresses the problem of providing an aqueous dispersion in which the epoxy resin or a modified form thereof is dispersed in an aqueous medium, an amino-group-containing epoxy resin obtained by reacting the epoxy resin with an amine compound, and a cationic electrodeposition coating that includes the amino-group-containing epoxy resin. Provided as a solution is an epoxy resin obtained by reacting at least a compound having one or more epoxy groups and a compound having a functional group that reacts with epoxy groups, wherein the epoxy resin satisfies conditions (I) and/or (II): (I) the compound having a functional group that reacts with the epoxy resin includes a trivalent or higher phenolic compound and/or a trifunctional or higher polyisocyanate; (II) the average degree of polyfunctionalization (X1) per molecule of epoxy resin represented by formula (1) (formula (1): average degree of polyfunctionalization (X1)=[number of terminals per molecule of epoxy resin]−2) is 0.30 or higher.

Inventors:
TSUSHIMA SHINJI (JP)
YAMADA NORIYUKI (JP)
IWAI TAKASHI (JP)
Application Number:
PCT/JP2021/011996
Publication Date:
September 30, 2021
Filing Date:
March 23, 2021
Export Citation:
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Assignee:
KANSAI PAINT CO LTD (JP)
International Classes:
C08G59/14; C08G18/00; C08G18/76; C08G18/79; C08L33/04; C08L63/00; C08L63/02; C09D5/44; C09D7/63; C09D133/00; C09D161/04; C09D161/10; C09D163/00; C09D175/00
Foreign References:
JPS606721A1985-01-14
JPH08134176A1996-05-28
JP2010540754A2010-12-24
JPH07126557A1995-05-16
JPH0616994A1994-01-25
JP2002201410A2002-07-19
JP2016017098A2016-02-01
JP2018162362A2018-10-18
JP2018100373A2018-06-28
JP2001279168A2001-10-10
JP2016135848A2016-07-28
Attorney, Agent or Firm:
YAMADA, Yasuyuki et al. (JP)
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