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. 16, 2016
Filed:
Nov. 03, 2011
Thomas Ernst Müller, Aachen, DE;
Christoph Gürtler, Köln, DE;
Anthony Kermagoret, Moelan sur mer, FR;
Yvonne Dienes, Hannover, DE;
Igor Busygin, Mannheim, DE;
Burkhard Köhler, Zierenberg, DE;
Walter Leitner, Aachen, DE;
Ganna Lyashenko, Mannheim, DE;
Thomas Ernst Müller, Aachen, DE;
Christoph Gürtler, Köln, DE;
Anthony Kermagoret, Moelan sur mer, FR;
Yvonne Dienes, Hannover, DE;
Igor Busygin, Mannheim, DE;
Burkhard Köhler, Zierenberg, DE;
Walter Leitner, Aachen, DE;
BAYER INTELLECTUAL PROPERTY GMBH, Monheim, DE;
Abstract
The invention relates to a process for the preparation of polycarbonate polyols, characterized in that cyclic carbonates are polymerized in the presence of DMC catalysts and chain-transfer agents consisting of polyether carbonate polyols.