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:
Feb. 25, 2025
Filed:
Oct. 15, 2019
Applicant:
Eni S.p.a., Rome, IT;
Inventors:
Paolo Biagini, Novara, IT;
Riccardo Po, Novara, IT;
Laura Boggioni, Abbiategrasso, IT;
Lorenzo Veronese, Cechov, IT;
Assignee:
ENI S.P.A., Rome, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 64/34 (2006.01); B01J 31/02 (2006.01); B01J 31/22 (2006.01); B01J 31/34 (2006.01); C07F 11/00 (2006.01); C08G 64/02 (2006.01); C08L 69/00 (2006.01);
U.S. Cl.
CPC ...
C08G 64/34 (2013.01); B01J 31/0268 (2013.01); B01J 31/2243 (2013.01); B01J 31/34 (2013.01); C07F 11/005 (2013.01); C08G 64/0208 (2013.01); C08L 69/00 (2013.01);
Abstract
There is a process for preparing polycarbonate. The process has the step of copolymerizing an epoxy compound and carbon dioxide (CO) in the presence of a catalytic system having at least one catalyst selected from complexes of a transition metal having general formula (I): The aforesaid process allows to obtain polycarbonates having a quantity of carbonate bonds in chain greater than 95% or polycarbonate/polyether copolymers having a quantity of ether bonds in chain ranging from 15% to 90%.