Title:
MODIFIED METAL OXIDE COLLOIDAL PARTICLES, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/100947
Kind Code:
A1
Abstract:
[Problem] To provide: modified metal oxide colloidal particles which suppress the occurrence of yellowing of a cured film when blended into a coating composition; and a method for producing same. [Solution] Modified metal oxide colloidal particles (C) have an average particle diameter of 5-300 nm and are formed by having metal oxide colloidal particles (A) as a core and coating the surfaces thereof with a coating layer (B) composed of a composite oxide of Si, Al and at least one atom selected from the group consisting of Sn, Sb and W. A method for producing the modified metal oxide colloidal particles (C) comprises the following steps (a) to (d) of: (a) mixing a dispersion containing metal oxide colloidal particles (A) with a dispersion of unmodified composite oxide colloidal particles of Si, and at least one atom selected from the group consisting of Sn, Sb and W; (b) heating the mixed solution obtained in step (a) at 30-320 °C for 0.5-24 hours; (c) bringing the mixed solution obtained in step (b) into contact with an H-type cation exchange resin; and (d) mixing the mixed solution obtained in step (c) and an aqueous aluminate solution and heating the mixture at 30-320 °C for 0.5-24 hours.
Inventors:
KOYAMA YOSHINARI (JP)
FURUKAWA TOMOKI (JP)
FURUKAWA TOMOKI (JP)
Application Number:
PCT/JP2022/044245
Publication Date:
June 08, 2023
Filing Date:
November 30, 2022
Export Citation:
Assignee:
NISSAN CHEMICAL CORP (JP)
International Classes:
C01G25/00; C09C1/00; C09C3/06; C09D7/62; C09D201/00
Domestic Patent References:
| WO2018181241A1 | 2018-10-04 | |||
| WO2012165620A1 | 2012-12-06 |
Foreign References:
| JPH04170323A | 1992-06-18 | |||
| JP2008508405A | 2008-03-21 |
Attorney, Agent or Firm:
HANABUSA PATENT & TRADEMARK OFFICE (JP)
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