Patent ID: 11925918
Assignee: CANON KABUSHIKI KAISHA
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  G  Y | IPC B  C  G

Claim 1:
2. A silica aggregate containing aluminum oxide on at least a portion of a surface thereof, wherein the silica aggregate is manufactured by a method comprising:
preparing a dispersion of primary silica particles having an average particle size of 1 nm or more and less than 10 nm;
adding a solution containing at least one of:
a compound represented by at least one of the following formulae (1) to (5), or
a condensate resulting from partial hydrolysis of at least one of the compounds represented by the formulae (1) to (5),, wherein R1 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 8 carbon atoms, R3, R4, R5, R6, and R9 are each independently a monovalent hydrocarbon group having 1 to 8 carbon atoms, R7 and R8 are each independently a divalent hydrocarbon group, and R2 is a divalent hydrocarbon group having 1 to 8 carbon atoms or a divalent group containing —NH—;

removing a dispersion medium from the dispersion; and
crosslinking the primary silica particles to each other.