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:
Jun. 03, 2025
Filed:
Nov. 11, 2021
Applicant:
Zeon Corporation, Tokyo, JP;
Inventor:
Hisashi Kurokawa, Tokyo, JP;
Assignee:
ZEON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/28 (2006.01); B01J 13/16 (2006.01); B01J 13/20 (2006.01); C08F 20/20 (2006.01);
U.S. Cl.
CPC ...
C08J 9/286 (2013.01); B01J 13/16 (2013.01); B01J 13/206 (2013.01); C08F 20/20 (2013.01); C08J 2201/0502 (2013.01); C08J 2335/02 (2013.01);
Abstract
To provide hollow particles excellent in performance stability in a high-humidity environment and low in relative permittivity. Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein the shell contains, as the resin, a polymer in which from 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein a void ratio is 60% or more; wherein a content of a surfactant present on a surface of the hollow particles is 200 ppm or less; and wherein a relative permittivity at a frequency of 1 MHz is 1.6 or less.