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. 10, 2019
Filed:
Nov. 25, 2014
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Alexander Gershanovich, Beverly Hills, MI (US);
Christopher M. Tanguay, Houston, TX (US);
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/80 (2006.01); C09K 8/66 (2006.01); C08G 18/65 (2006.01); C08G 18/69 (2006.01); C08G 18/76 (2006.01); C09D 175/14 (2006.01); C09K 8/68 (2006.01); C09K 8/88 (2006.01);
U.S. Cl.
CPC ...
C09K 8/805 (2013.01); C08G 18/6588 (2013.01); C08G 18/69 (2013.01); C08G 18/7657 (2013.01); C09D 175/14 (2013.01); C09K 8/66 (2013.01); C09K 8/68 (2013.01); C09K 8/885 (2013.01);
Abstract
A proppant includes a particle present in an amount of from 90 to 99.5 percent by weight based on the total weight of the proppant, and a polyurethane coating disposed about the particle and present in an amount of from 0.5 to 10 percent by weight based on the total weight of the proppant. The polyurethane coating comprises the reaction product of an isocyanate component and an isocyanate-reactive component comprising a polydiene polyol.