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:
Aug. 06, 2024
Filed:
Jul. 01, 2019
Tokuyama Corporation, Shunan, JP;
TOKUYAMA CORPORATION, , JP;
Abstract
Provided is a novel spherical polymethylsilsesquioxane particle having an unprecedentedly large specific surface area ratio. The spherical polymethylsilsesquioxane particle includes a particle main body containing at least: a network structure formed by silicon atoms (n) and oxygen atoms (n) bonded to the silicon atoms (n); a methyl group bonded to at least one of the silicon atoms (n); and an alkoxyl group bonded to at least one of the silicon atoms (n), wherein the spherical polymethylsilsesquioxane particle satisfies the following expression (1): Expression (1) S/S≥8.0, in the expression (1), Srepresents a specific surface area (m/g) measured by a nitrogen adsorption BET one-point method, Srepresents 6/(ρ×D50) and a unit thereof is (m/g), ρ represents a particle density (g/m), and D50 represents a volume-based 50% cumulative diameter (m) measured by a laser diffraction/scattering method.