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:
Dec. 27, 2016
Filed:
May. 02, 2014
Applicant:
Bayer Materialscience Llc, Pittsburgh, PA (US);
Inventors:
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/30 (2006.01); C08G 64/40 (2006.01); C08G 64/02 (2006.01); C08G 64/30 (2006.01); C08G 64/34 (2006.01);
U.S. Cl.
CPC ...
C08G 64/406 (2013.01); C08G 64/0208 (2013.01); C08G 64/302 (2013.01); C08G 64/34 (2013.01);
Abstract
This invention relates to a process for the production of a high purity polyether carbonate polyol. The high purity polyether carbonate polyols prepared by the process herein contain a low level of catalyst residues. The process adds diatomaceous earth to a polyether carbonate polyol to form a suspension, mixes the suspension for a specified time period at a specified temperature, and filters the suspension to form the high purity polyether carbonate polyol.