US 12,104,015 B2
Method for the synthesis of polyethers
David Mecerreyes Molero, Lasarte-Oria (ES); Andere Basterretxea Gorostiza, San Sebastian (ES); Elena Gabirondo Amenabar, San Sebastian (ES); and Haritz Sardon Muguruza, San Sebastian (ES)
Assigned to UNIVERSIDAD DEL PAIS VASCO, Leioa (ES); and BASQUE CENTER FOR MACROMOLECULAR DESIGN AND ENGINEERING, POLYMAT FUNDAZIOA, San Sebastian (ES)
Appl. No. 17/053,562
Filed by UNIVERSIDAD DEL PAIS VASCO/EUSKAL HERRIKO UNIBERTSITATEA, Leioa (ES); and BASQUE CENTER FOR MACROMOLECULAR DESIGN AND ENGINEERING, POLYMAT FUNDAZIOA, San Sebastian (ES)
PCT Filed May 10, 2019, PCT No. PCT/ES2019/070311
§ 371(c)(1), (2) Date Nov. 6, 2020,
PCT Pub. No. WO2019/215373, PCT Pub. Date Nov. 14, 2019.
Claims priority of application No. 201830462 (ES), filed on May 11, 2018.
Prior Publication US 2021/0238346 A1, Aug. 5, 2021
Int. Cl. C08G 65/34 (2006.01); B01J 31/02 (2006.01)
CPC C08G 65/34 (2013.01) [B01J 31/0225 (2013.01); B01J 31/0251 (2013.01); B01J 31/0298 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for preparing a polyether, comprising the steps of:
a) mixing at least one optionally substituted and optionally polymeric alcohol comprising at least two terminal hydroxyl groups with a protic ionic salt formed by the combination of a Brønsted acid and a Brønsted base, wherein the molar proportion of the protic ionic salt with respect to the total amount of moles of the alcohol is between 1 to 15%;
b) heating the mixture obtained in step (a) at a temperature comprised between 100° C. and 300° C.