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. 06, 2010
Filed:
Nov. 25, 2004
Akihiro Inukai, Aichi, JP;
Jyun Birukawa, Ichihara, JP;
Shuji Matsumura, Takaishi, JP;
Prime Polymer Co., Ltd., Tokyo, JP;
Abstract
A polypropylene for an electric material has a melt flow rate of 0.1 to 30 g/10 min., a mesopentad fraction calculated from aC-NMR spectrum of 0.90 to 0.99, and a firing residue of 50 ppm by weight or less based on the polypropylene, a titanium content and an iron content which are detected from the firing residue, of 1 ppm by weight or less and 0.1 ppm or less, respectively, based on the polypropylene, and the chlorine content of 5 ppm by weight or less based on the polypropylene. The above polypropylene exhibits excellent electric insulation and has a roughened surface when it is formed into a film, and thus the polypropylene can be suitably used for a capacitor film without using an additive such as a β crystal nucleating agent. The polypropylene is also useful as a material of a film for coating an electric wire and a material for an instrument for conveying an electronic material.