US 11,912,822 B2
Process of manufacturing polyols
Arjun Raghuraman, Pearland, TX (US); William H. Heath, Lake Jackson, TX (US); Sukrit Mukhopadhyay, Midland, MI (US); Heather A. Spinney, Midland, MI (US); and David R. Wilson, Midland, MI (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 16/642,216
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Sep. 14, 2018, PCT No. PCT/US2018/050995
§ 371(c)(1), (2) Date Feb. 26, 2020,
PCT Pub. No. WO2019/055734, PCT Pub. Date Mar. 21, 2019.
Claims priority of provisional application 62/635,649, filed on Feb. 27, 2018.
Claims priority of provisional application 62/559,793, filed on Sep. 18, 2017.
Claims priority of provisional application 62/559,803, filed on Sep. 18, 2017.
Claims priority of provisional application 62/558,425, filed on Sep. 14, 2017.
Claims priority of provisional application 62/558,416, filed on Sep. 14, 2017.
Prior Publication US 2020/0354383 A1, Nov. 12, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 65/26 (2006.01); C08G 18/48 (2006.01); C07F 5/02 (2006.01); C08G 18/76 (2006.01); C10M 107/34 (2006.01); C11D 1/72 (2006.01)
CPC C08G 65/2654 (2013.01) [C07F 5/027 (2013.01); C08G 18/4841 (2013.01); C08G 18/4854 (2013.01); C08G 18/7621 (2013.01); C08G 18/7671 (2013.01); C08G 65/266 (2013.01); C08G 65/2684 (2013.01); C08G 2650/22 (2013.01); C08G 2650/38 (2013.01); C08G 2650/44 (2013.01); C10M 107/34 (2013.01); C11D 1/72 (2013.01)] 13 Claims
 
1. A method of producing a polyether polyol, comprising:
reacting a low molecular weight initiator with ethylene oxide in the presence of a polymerization catalyst, the low molecular weight initiator having a nominal hydroxyl functionality at least 2, and the polymerization catalyst being a Lewis acid catalyst having the general formula M(R1)1(R2)1(R3)1(R4)0 or 1, whereas M is boron, aluminum, indium, bismuth or erbium, R1, R2, R3, and R4 are each independent, R1 includes a first fluoroalkyl-substituted phenyl group, R2 includes a second fluoroalkyl-substituted phenyl group or a first fluoro or chloro-substituted phenyl group, R3 includes a third fluoroalkyl-substituted phenyl group or a second fluoro or chloro-substituted phenyl group, and optional R4 includes a functional group or functional polymer group, R1 being different from at least one of R2 and R3; and
forming a polyether polyol having a number average molecular weight of greater than the number average molecular weight of the low molecular weight initiator in the presence of the Lewis acid catalyst.