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:
Dec. 09, 2014
Filed:
Sep. 30, 2013
Applicant:
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Inventors:
Shingo Namiki, Fukuoka, JP;
Takehito Nagao, Fukuoka, JP;
Assignee:
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/00 (2006.01); C08G 64/02 (2006.01); C08G 64/30 (2006.01); C08G 75/00 (2006.01);
U.S. Cl.
CPC ...
C08G 64/305 (2013.01); C08G 64/0208 (2013.01);
Abstract
The present invention is a production method of a polycarbonate resin, including a step of performing melt polycondensation by continuously feeding a dihydroxy compound (A) having a predetermined moiety in a part of the structure and a carbonic acid diester each in a liquid state to a reactor, wherein the residence time from liquefaction of the dihydroxy compound to its feeding to a reactor is from 0.1 to 10 hours.