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:
Sep. 08, 2020
Filed:
Jun. 20, 2016
Applicant:
Covestro Llc, Pittsburgh, PA (US);
Inventors:
Jean-Paul Masy, Terneuzen, NL;
Carlos M. Villa, Freeport, TX (US);
David A. Babb, Freeport, TX (US);
John W. Weston, Freeport, TX (US);
Sweta Somasi, Indianapolis, IN (US);
Assignee:
Covestro LLC, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/48 (2006.01); C08G 65/26 (2006.01); C08G 101/00 (2006.01);
U.S. Cl.
CPC ...
C08G 65/2663 (2013.01); C08G 18/4829 (2013.01); C08G 65/2696 (2013.01); C08G 2101/0025 (2013.01);
Abstract
Polyether polyols are made by a process that includes a continuous addition of starter and alkylene oxide. The feed of starter is discontinued when 80 to 95% of the alkylene oxide has been fed to the reactor. This process produces a product with a narrow molecular weight distribution.