ZrO2 dispersion liquid

Patent metadata

Field	Value
Publication number	US-12441870-B2
Application number	US-202218718897-A
Country	US
Kind code	B2
Filing date	Dec 14, 2022
Priority date	Dec 14, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A ZrO2 dispersion liquid containing, a ZrO2 particle coated with a silane coupling agent, and a dispersion medium for the ZrO2 particle, wherein a BET specific surface area of the ZrO2 particle coated with the silane coupling agent obtained by removing the dispersion medium is 36% or more of a BET specific surface area of the ZrO2 particle before coating with the silane coupling agent.

First claim

The invention claimed is:

1. A ZrO 2 dispersion liquid comprising: a Zro 2 particle coated with a silane coupling agent, and a dispersion medium for the ZrO 2 particle, wherein a BET specific surface area of the ZrO 2 particle coated with the silane coupling agent obtained by removing the dispersion medium is 36% or more of a BET specific surface area of the Zro 2 particle before coating with the silane coupling agent, and an average primary particle size of the ZrO 2 , particle before coating with the silane coupling agent is 3.0 nm or more and 20.0 nm or less.

2. The Zro 2 dispersion liquid according to claim 1 , wherein the ZrO 2 dispersion liquid is for use in coating agents.

3. A curable composition comprising, the ZrO 2 dispersion liquid according to claim 1 .

4. The curable composition according to claim 3 , wherein the composition comprises a polymerizable compound.

5. The curable composition according to claim 4 , wherein the polymerizable compound is a curable resin.

6. A method for producing a ZrO 2 dispersion liquid containing a ZrO 2 particle coated with a silane coupling agent, comprising:
mixing a ZrO 2 particle with a dispersion medium for the ZrO 2 particle, an average primary particle size of the ZrO 2 particle being 3.0 nm or more and 20.0 nm or less; and
reacting the ZrO 2 particle with the silane coupling agent in the obtained mixture,
wherein the reaction of the ZrO 2 particle with the silane coupling agent is carried out until a BET specific surface area of the ZrO 2 particle coated with the silane coupling agent obtained by removing the dispersion medium from the mixture during the reaction reaches 36% or more of a BET specific surface area of the ZrO 2 particle before coating with the silane coupling agent.

7. The method for producing a ZrO 2 dispersion liquid according to claim 6 , wherein the mixture contains a catalyst, and the ZrO 2 particle is reacted with the silane coupling agent in the presence of the catalyst.

8. The method for producing a ZrO 2 dispersion liquid according to claim 6 , wherein a reaction temperature of the ZrO 2 particle and the silane coupling agent is 10° C. or more and 100° C. or less.

9. The method for producing a ZrO 2 dispersion liquid according to claim 6 , wherein a reaction time of the ZrO 2 particle and the silane coupling agent is 1 hour or more.

10. The method for producing a ZrO 2 dispersion liquid according to claim 6 , wherein the dispersion medium is removed from the ZrO 2 dispersion liquid, and resulting powder containing the ZrO 2 particle coated with the silane coupling agent is dispersed in another dispersion medium.

Assignees

• Kanto Denka Kogyo Kk

Inventors

• Goto Yuki

Classifications

• C09C3/12

  Treatment with organosilicon compounds {(C09C3/006 takes precedence)} · CPC title

• C08K2201/011

  Nanostructured additives · CPC title

• C08K2201/006

  Additives being defined by their surface area · CPC title

• C01P2006/12

  Surface area · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title