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. 20, 2010
Filed:
May. 19, 2004
Yasushi Kumashiro, Chikusei, JP;
Yoshitaka Hirata, Chikusei, JP;
Shin Takanezawa, Chikusei, JP;
Yasushi Shimada, Tsukuba, JP;
Kazuhisa Otsuka, Chikusei, JP;
Hiroyuki Kuriya, Chikusei, JP;
Kazunori Yamamoto, Tsukuba, JP;
Yasushi Kumashiro, Chikusei, JP;
Yoshitaka Hirata, Chikusei, JP;
Shin Takanezawa, Chikusei, JP;
Yasushi Shimada, Tsukuba, JP;
Kazuhisa Otsuka, Chikusei, JP;
Hiroyuki Kuriya, Chikusei, JP;
Kazunori Yamamoto, Tsukuba, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
There is provided an insulation material having a dielectric constant of 10 or more, comprising a filler having a dielectric constant of 50 or more and having two peaks in different particle size ranges in a particle size distribution and an insulating resin combined with each other; an insulation material having a dielectric constant of 10 or more comprising, as essential components, 1) at least one filler selected from the group consisting of barium titanate, strontium titanate, potassium titanate, magnesium titanate, lead titanate, titanium dioxide, barium zirconate, calcium zirconate and lead zirconate, 2) an insulating resin and 3) a dispersant containing a carboxylic group; or an insulation material comprising a filler having a dielectric constant of 50 or more, a dispersant for dispersing the filler and an insulating resin as essential components, wherein an extract of a cured product of the insulation material obtained by extraction with water at 120° C. for 20 hours using a pressure vessel has a pH of 6 or higher.