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:
Mar. 13, 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
Embodiments of the invention provide for methods of producing a polycarbonate polyol. The method includes charging a vessel with butanediol, charging the vessel with a polymerization catalyst, and adding to the vessel dimethyl carbonate at a rate of at least 2.0 g of DMC per minute per kg of BDO to produce polycarbonate polyol at a polycarbonate polyol yield of at least 80% of a theoretical yield.