The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2024
Filed:
Sep. 07, 2018
Nissan Chemical Corporation, Tokyo, JP;
Naohiko Suemura, Sodegaura, JP;
Masatoshi Sugisawa, Sodegaura, JP;
NISSAN CHEMICAL CORPORATION, Tokyo, JP;
Abstract
An insulating composition containing silica particles, a resin, and a curing agent, wherein: when an aqueous solution of the silica particles having an SiOconcentration of 3.8% by mass is heated at 121° C. for 20 hours, the amount of Na ions eluted from the silica particles is 40 ppm/SiOor less, especially, wherein the amount of Na ions eluted from the silica particles after the heating may be 5-38 ppm/SiO, and, the silica particles may contain a polyvalent metal oxide so the ratio by mole of a polyvalent metal M to Si is 0.001-0.02; the mass ratio of NaO/SiOin the silica particles may be 700-1,300 ppm; and the silica particles may have, on the surfaces thereof, a layer having a thickness of 0.1-1.5 nm and an NaO/SiOmass ratio of 10-400 ppm, and may have an average particle diameter of 5-40 nm.