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:
Feb. 11, 2025
Filed:
Feb. 22, 2019
Zhejiang Third Age Material Technology Co., Ltd., Huzhou, CN;
Shuzhen Chen, Huzhou, CN;
Rui Li, Huzhou, CN;
Zhejiang Third Age Material Technology Co., Ltd., Huzhou, CN;
Abstract
The present invention relates to a method for preparing a spherical or angular powder filler, comprising providing a spherical or angular siloxane comprising T units; performing a heat treatment on the spherical or angular siloxane, the heat treatment temperature between 250° C. and the temperature of oxidative decomposition of organic groups, so that silicon hydroxyl groups in the spherical or angular siloxane are condensed to obtain a condensed siloxane; and adding a treatment agent to treat the condensed siloxane to promote the condensation of silicon hydroxyl groups in the condensed siloxane to give a spherical or angular powder filler, the treatment agent comprising a silane coupling agent and/or disilazane, and the quotient of the molecular weight of at least a portion of the silane coupling agent and/or the disilazane divided by its specific gravity at 25° C. being less than or equal to 210. The present invention also provides a spherical or angular powder filler obtained therefrom. The present invention further provides use of above spherical or angular powder filler. The filler provided by the present invention has low permittivity, low permittivity loss, without conductive impurities, without coarse oversize particles, and low radioactivity.