	US 12,378,127 B2
	Silica sol having particle size distribution and production method therefor
Megumi Araki, Sodegaura (JP); Naohiko Suemura, Sodegaura (JP); Takeshi Nakada, Sodegaura (JP); Hikaru Onishi, Sodegaura (JP); Masatoshi Sugisawa, Sodegaura (JP); and Jiahao Liu, Sodegaura (JP)
Assigned to NISSAN CHEMICAL CORPORATION, Tokyo (JP)
Appl. No. 18/286,321
Filed by NISSAN CHEMICAL CORPORATION, Tokyo (JP)
PCT Filed Jan. 13, 2023, PCT No. PCT/JP2023/000839 § 371(c)(1), (2) Date Oct. 10, 2023, PCT Pub. No. WO2023/136331, PCT Pub. Date Jul. 20, 2023.
Claims priority of application No. 2022-003956 (JP), filed on Jan. 13, 2022.
Prior Publication US 2024/0270582 A1, Aug. 15, 2024
Int. Cl. C01B 33/149 (2006.01)

CPC C01B 33/149 (2013.01) [C01P 2004/53 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/22 (2013.01)]

20 Claims

1. A silica sol comprising silica particles exhibiting an average particle diameter distribution having at least two peaks, and a basic substance, characterized in that:

the at least two peaks include a peak a which is largest in a range of D50 to D90 and is present in a range of 35 nm or more and 115 nm or less, and a peak b which is largest in a range of D10 to D50 and is present in a range of 5 nm or more and less than 35 nm;

the silica particles contain, in the surfaces of at least a portion thereof, an organic group directly bonded to a silicon atom via an Si—C bond and an alkoxy group consisting of a methoxy group or an ethoxy group; and the alkoxy group is bonded to the surfaces of the silica particles in an amount of 0.6 to 3.0/nm², and

wherein peak a is higher than peak b.