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:
Oct. 04, 2022
Filed:
Dec. 12, 2018
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Jan Heijl, Lokeren, DE;
Rolf Bachmann, Bergisch Gladbach, DE;
Volker Michele, Cologne, DE;
Felix Cock, Wilrijk, BE;
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/14 (2006.01); C08G 64/20 (2006.01); C08G 64/24 (2006.01);
U.S. Cl.
CPC ...
C08G 64/205 (2013.01); C08G 64/14 (2013.01); C08G 64/24 (2013.01);
Abstract
A process for preparing polycarbonate by the phase interface process in the presence of at least one catalyst, wherein immediately after the optionally first addition of the at least one catalyst, from 0.01 to 20 J/kg of mixing energy is introduced into the system comprising the at least one catalyst within a time of from 2 to 1200 s. A mixture, an organic phase, and a process for distributing at least one catalyst in a system comprising an organic phase and an aqueous phase are also disclosed herein.