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:
Nov. 15, 2016
Filed:
Dec. 21, 2015
Covestro Llc, Pittsburgh, PA (US);
Kenneth G. McDaniel, Langhorne, PA (US);
Rick L. Adkins, Canonsburg, PA (US);
Don S. Wardius, Pittsburgh, PA (US);
Covestro LLC, Pittsburgh, PA (US);
Abstract
This invention relates to a novel process for preparing an aliphatic hybrid ester/ether polyol. This process simultaneously transesterifies and alkoxylates a mixture of at least one ester group containing compound which is free of ether groups, and at least one or more hydroxyl group containing compound which is free of ester groups; with the proviso that the mixture has an overall hydroxyl number of less than or equal to 350; with at least one alkylene oxide; in the presence of a mixture of catalysts. The catalyst mixture comprises at least one DMC catalyst, and at least one non-alkaline transesterification catalyst.