公开(公告)号：US20240209234A1

公开(公告)日：2024-06-27

申请号：US18555810

申请日：2022-04-14

Applicant: VERSUM MATERIALS US, LLC

Inventor： GERHARD JONSCHKER ,  RENE LUTZ ,  CHRISTOS KYRIAKOU

IPC: C09G1/02 ,  C01B33/145 ,  C09K3/14

CPC classification number: C09G1/02 ,  C01B33/145 ,  C09K3/1409 ,  C01P2004/03 ,  C01P2004/30 ,  C01P2004/64

Abstract: Processes of synthesizing non-spherical primary silica nanoparticles comprise reacting at least two organoalkoxysilanes with water in a reaction mixture comprising water-miscible organic solvent and alkaline catalyst under alkaline conditions. The at least two organoalkoxysilanes have different reaction speeds with water under alkaline conditions. Each organoalkoxysilane has a structure represented by: SiR1R2R3R4 (I), wherein R1, R2, R3, and R4 are each independently selected from the group consisting of OR or R, wherein R is a substituted or unsubstituted linear or branched C1-C12 alkyl group, a C3-C8 cycloaliphatic group, a C2-C6 alkylene group, a halogen, or an aryl group, at least two, preferable at least three of R1, R2, R3, and R4 are OR; and at least one of the at least two organoalkoxysilanes has at least three of OR. A molar ratio of water (H2O) and hydrolysable groups (OR) on the at least two organoalkoxysilanes is >0 and