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. 20, 2016
Filed:
Oct. 15, 2015
Asahi Glass Company, Limited, Tokyo, JP;
ASAHI GLASS COMPANY, LIMITED, Tokyo, JP;
Abstract
The present invention relates to a method of producing polycarbonate containing following step (a) and step (b), (a) a step of reacting a specific fluorine-containing carbonate (Compound (1), etc.) and an aromatic dihydroxy compound in the presence of a condensation catalyst, to obtain a prepolymer, and (b) a step of heating the prepolymer at a temperature which is lower than a melting temperature of the prepolymer and performing solid phase polymerization on the prepolymer while a fluorine-containing alcohol that is produced as a by-product is discharged out of a system, to obtain a polycarbonate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile