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. 10, 2015
Filed:
Feb. 04, 2013
William H. Heath, Lake Jackson, TX (US);
Harpreet Singh, Pearland, TX (US);
Amarnath Singh, Pearland, TX (US);
Jorge Jimenez, Lake Jackson, TX (US);
Qiuyun Xu, Pearland, TX (US);
William H. Heath, Lake Jackson, TX (US);
Harpreet Singh, Pearland, TX (US);
Amarnath Singh, Pearland, TX (US);
Jorge Jimenez, Lake Jackson, TX (US);
Qiuyun Xu, Pearland, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Polyester-co-carbonate polyols and methods for producing the same are provided. The method comprises reacting one or more alcohols having an OH functionality of two or more with one or more organic diacids to form a reaction mixture, adding a first amount of dialkyl carbonate to the reaction mixture to remove water remaining from the reaction mixture by azeotropic drying, adding a transesterification catalyst to the dialkyl carbonate containing reaction mixture and adding a second amount of dialkyl carbonate to the catalyst containing reaction mixture.