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. 06, 2019
Filed:
Jan. 20, 2016
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Ivan Sluijs, Boechout, BE;
Jan Heijl, Lokeren, BE;
Erik Sluyts, Brasschaat, BE;
Frank Bruynseels, Sint-Gillis Waas, BE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/14 (2006.01); C08G 64/30 (2006.01);
U.S. Cl.
CPC ...
C08G 64/14 (2013.01); C08G 64/307 (2013.01);
Abstract
The present invention relates to a melt transesterification process for the production of (co)polycarbonates from diaryl carbonates and cycloalkylidene diphenols, which process comprises the addition of a monohydroxyaryl compound in an amount of 5.0 to 20.0 wt.-%, based on the total mass of the reaction mixture. The invention further relates to a (co)polycarbonate obtained by the process.