Process for production of polyethers and polymers
View Patent ↗The invention aims at providing a process of subjecting a polyether polymer containing a double metal cyanide complex and/or residue compounds thereof as the metallic impurities to extraction with water to thereby remove the metallic impurities, which enables simpler and complete removal of the impurities; and polyether polymers obtained by the process. This aim is attained by a process for the purification of polyethers characterized by blending (A) a polyether containing a double metal cyanide complex and/or residue compounds thereof with ascorbic acid or a derivative thereof and water and then removing the aqueous phase from the resulting mixture to thereby remove the double metal cyanide and/or the residue compounds.
1. A method of producing a polyether, including a purification step, characterized by removing double metal cyanide complex and/or the residual compound thereof by water extraction, wherein the method comprises: adding ascorbic acid or the derivative thereof and water to a polyether (A) containing double metal cyanide complex and/or the residual compound thereof; separating the resulting mixture to aqueous phase and organic phase, and removing the aqueous phase from the mixture.
2. A method of producing an unsaturated group-containing polyether, including a purification step, characterized by removing double metal cyanide complex and/or the residual compound thereof by water extraction, wherein the method comprises: adding ascorbic acid or the derivative thereof and water to an unsaturated group-containing polyether (B) containing a double metal cyanide complex and/or the residual compound thereof; separating the resulting mixture to aqueous phase and organic phase, and removing the aqueous phase from the mixture.
3. A method of producing a polyether, including a purification step, characterized by removing double metal cyanide complex and/or the residual compound thereof by water extraction, wherein the method comprises: adding an organic solvent and ascorbic acid or the derivative thereof and water to a polyether (A) containing double metal cyanide complex and/or the residual compound thereof, separating the resulting mixture to aqueous phase and organic phase, and removing the aqueous phase from the mixture.
4. A method of producing a polyether, including a purification step, characterized by removing double metal cyanide complex and/or the residual compound thereof by water extraction, wherein the method comprises: adding an organic solvent and ascorbic acid or the derivative thereof and water to an unsaturated group-containing polyether (B) containing a double metal cyanide complex and/or the residual compound thereof, separating the mixture to aqueous phase, and organic phase and removing the aqueous phase from the mixture.
5. The method of producing a polyether according to claim 2 , characterized by using, as the component (B), an unsaturated group-containing polyether prepared by alkoxylating with alkali metal compounds the terminal hydroxyl groups of a terminal hydroxyl group-containing polyether polymer obtained by polymerization in the presence of a double metal cyanide complex catalyst, and allowing it to react with an unsaturated group-containing compound represented by Formula (1):
H 2 C═C(R 2 )—R 1 —Y or H(R 2 )C═CH—R 1 —Y (1)
(wherein, R 1 represents a bivalent organic group having 1 to 20 carbon atoms containing one or more atoms selected from the group consisting of hydrogen, oxygen, and nitrogen as its constituent atoms; R 2 represents a hydrogen atom or a hydrocarbon having 10 or less carbon atoms; and Y represents a halogen atom).
6. The method of producing a polyether according to claim 1 ,
wherein a polyether having a peroxide content of 30 ppm or less, as determined by iodine thiosulfate titration, before addition of ascorbic acid and/or the derivative thereof is used as the polyether (A).
7. The method of producing a polyether according to claim 1 ,
wherein 20 to 500 wt parts of water is used, with respect to 100 wt parts of the polyether (A).
8. The method of producing a polyether according to claim 2 ,
wherein a polyether having a peroxide content of 30 ppm or less, as determined by iodine thiosulfate titration, before addition of ascorbic acid and/or the derivative thereof is used as the polyether (B).
9. The method of producing a polyether according to claim 2 ,
wherein 20 to 500 wt parts of water is used, with respect to 100 wt parts of the polyether (B).
10. The method of producing a polyether according to claim 3 ,
wherein a polyether having a peroxide content of 30 ppm or less, as determined by iodine thiosulfate titration, before addition of ascorbic acid and/or the derivative thereof is used as the polyether (A).
11. The method of producing a polyether according to claim 3 ,
wherein 20 to 500 wt parts of water is used, with respect to 100 wt parts of the polyether (A).
12. The method of producing a polyether according to claim 4 ,
wherein a polyether having a peroxide content of 30 ppm or less, as determined by iodine thiosulfate titration, before addition of ascorbic acid and/or the derivative thereof is used as the polyether (B).
13. The method of producing a polyether according to claim 4 ,
wherein 20 to 500 wt parts of water is used, with respect to 100 wt parts of the polyether (B).