Patent ID: 11961636
Assignee: NISSAN CHEMICAL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 2:
3. The insulating composition according to claim 1, wherein the silica particles (A) are produced in a process comprising:
a step of preparing an aqueous dispersion of silica particles (a) by heating a silicate liquid obtained by cation exchange of an aqueous alkali silicate solution, and the following steps (I) and (II):
step (I): a step of subjecting the aqueous dispersion of the silica particles (a) to heating at 100 to 200° C., and optionally also a step of maintaining the aqueous dispersion at room temperature to 50° C. under acidic conditions with a pH of 1 to 4; and
step (II): a step of subjecting the aqueous dispersion of the silica particles (a) that has been subjected to the step (I) to the following step (II-i) or (II-ii):
step (II-i): a step of performing cation exchange and anion exchange sequentially, or
step (II-ii): a step of performing cation exchange, anion exchange, and cation exchange sequentially.