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:
Aug. 16, 2011
Filed:
May. 22, 2007
Ryuuji Uchimura, Fukuoka, JP;
Toshiyuki Hamano, Mie, JP;
Kazuyuki Takahashi, Fukuoka, JP;
Masaaki Miyamoto, Kitakyushu, JP;
Kodama Miyamoto, Legal Representative, Fukuoka, JP;
Taro Miyamoto, Legal Representative, Fukuoka, JP;
Hideo Miyamoto, Legal Representative, Fukuoka, JP;
Hanae Miyamoto, Legal Representative, Fukuoka, JP;
Ryuuji Uchimura, Fukuoka, JP;
Toshiyuki Hamano, Mie, JP;
Kazuyuki Takahashi, Fukuoka, JP;
Masaaki Miyamoto, Kitakyushu, JP;
Kodama Miyamoto, legal representative, Fukuoka, JP;
Taro Miyamoto, legal representative, Fukuoka, JP;
Hideo Miyamoto, legal representative, Fukuoka, JP;
Hanae Miyamoto, legal representative, Fukuoka, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
The object of the present invention is to provide a method of producing plural kinds of aromatic polycarbonates by a melt process without changeover loss and quality deterioration. The present invention relates to a production method of an aromatic polycarbonate, comprising supplying a molten mixture of raw materials of an aromatic dihydroxy compound and/or a carbonic diester prepared in the absence of an ester exchange catalyst to polycondensation steps of two lines each equipped with three vertical reactors connected in series and one horizontal reactor, and at the same time, continuously conducting polycondensation reaction in the presence of an ester exchange catalyst.