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:
Sep. 24, 2013
Filed:
Oct. 05, 2010
Takayuki Ozaki, Chiyoda-ku, JP;
Hiroshi Okamoto, Chiyoda-ku, JP;
Hiroshi Shuto, Chiyoda-ku, JP;
Teijin Chemicals, Ltd., Tokyo, JP;
Abstract
This invention provides a branched polycarbonate resin obtained from a dihydric phenol compound, a branching agent, monohydric phenols and phosgene by an interfacial polymerization reaction method in the presence of an alkali aqueous solution and an organic solvent, the branched polycarbonate resin having features that: (i) the branching agent content (X) thereof is over 0.70 mol % but 1.50 mol % or less, (ii) the branching agent content (X) and the melt tension (Y) thereof at 280° C. satisfy the following expression (1), 3.8X−2.4≦Y≦3.8X+4.5 (1), and (iii) the entire N content in the branched polycarbonate resin is 0 to 7 ppm.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile