US 12,071,505 B2
Polyurethanes and method for making polyurethanes
Kshitish A. Patankar, Midland, MI (US); Arjun Raghuraman, Pearland, TX (US); Thomas P. Willumstad, Pearland, TX (US); Mark F. Sonnenschein, Midland, MI (US); Jody Henning, Midland, MI (US); Heather A. Spinney, Midland, MI (US); David R. Wilson, Midland, MI (US); Sukrit Mukhopadhyay, Midland, MI (US); and William H. Heath, Lake Jackson, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/277,416
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Sep. 17, 2019, PCT No. PCT/US2019/051571
§ 371(c)(1), (2) Date Mar. 18, 2021,
PCT Pub. No. WO2020/068493, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/738,611, filed on Sep. 28, 2018.
Prior Publication US 2022/0033565 A1, Feb. 3, 2022
Int. Cl. C08G 18/48 (2006.01); C08G 18/32 (2006.01); C08G 18/66 (2006.01); C08G 65/26 (2006.01)
CPC C08G 18/4825 (2013.01) [C08G 18/3206 (2013.01); C08G 18/6674 (2013.01); C08G 65/2609 (2013.01); C08G 65/2654 (2013.01); C08G 65/2684 (2013.01)] 12 Claims
 
1. A polyurethane which is the reaction product of a reaction mixture including i) one or more polyisocyanates, ii) one or more chain extenders and/or crosslinkers and iii) one or more polyols having a hydroxyl equivalent weight of at least 350, wherein at least 50% of the weight of iii) is a hydroxyl-containing homopolymer of propylene oxide, the hydroxyl-containing homopolymer of propylene oxide having a hydroxyl equivalent weight of at least 350, an average of 1.8 to 3 hydroxyl groups per molecule of which hydroxyl groups 40 to 65% are primary hydroxyl groups, and a polydispersity of 1.00 to 1.08.