Process for producing polycyclic polyether polyols
Processes are described for producing a polycyclic polyether polyol having a hydroxyl functionality of 1.5 to 6 and a number average molecular weight of 200 to 12,000 Da. The processes comprise alkoxylating a polyol starter comprising predominantly a polycyclic polyol with an alkylene oxide in the presence of a DMC catalyst.
1. A process for producing a polycyclic polyether polyol having a hydroxyl functionality of 1.5 to 6 and a number average molecular weight of 200 to 12,000 Da, comprising alkoxylating a polyol starter comprising predominantly a polycyclic polyol with an alkylene oxide in the presence of a DMC catalyst.
2. The process of claim 1 , wherein the polycyclic polyether polyol has a functionality of 2 to 3.
3. The process of claim 2 , wherein the polycyclic polyether polyol has a number average molecular weight of 200 Da to 600 Da.
4. The process of claim 3 , wherein the polycyclic polyether polyol has a viscosity at 25° C. of no more than 7500 cks.
5. The process of claim 3 , wherein the polycyclic polyether polyol exhibits an APHA color of no more than 500.
6. The process of claim 1 , wherein the polycyclic polyol starter comprises a polycyclic diol.
7. The process of claim 6 , wherein the polycyclic diol starter comprises a bicyclic diol.
8. The process of claim 7 , wherein the bicyclic diol starter includes an ether linkage.
9. The process of claim 1 , wherein the polycyclic polyol starter comprises a tricyclodecane unit, a bicyclodecane unit, a norbornane unit, a bicyclooctane unit, a bicyclononane unit, an isosorbide unit, or a bicycloundecane unit.
10. The process of claim 1 , wherein the polycyclic polyol starter comprises a 1,4:3,6-dianhydrohexitol.
11. The process of claim 10 , wherein the 1,4:3,6-dianhydrohexitol starter is used in an amount of at least 90% by weight, based on the total weight of starter.
12. The process of claim 10 , wherein the 1,4:3,6-dianhydrohexitol starter has a purity of greater than 98%.
13. The process of claim 12 , wherein the purity of the 1,4:3,6-dianhydrohexitol starter is at least 98.5%.
14. The process of claim 13 , wherein the DMC catalyst is present in an amount of at least 0.01% by weight, based on the total weight of the polycyclic polyether polyol.
15. The process of claim 1 , wherein the polycyclic polyol starter is present in an amount of at least 80% by weight, based on the total weight of starter.
16. The process of claim 1 , wherein the polycyclic polyol starter comprises a polycyclic polyether polyol.
17. A process for producing a polycyclic polyether polyol having a hydroxyl functionality of 1.5 to 3 and a number average molecular weight of 200 to 800 Da, comprising alkoxylating a polyol starter consisting essentially of a 1,4:3,6-dianhydrohexitol having a purity of greater than 98%, with an alkylene oxide in the presence of a DMC catalyst.
18. The process of claim 17 , wherein the polycyclic polyether polyol has a functionality of 2 to 3.
19. The process of claim 18 , wherein the polycyclic polyether polyol has a number average molecular weight of 200 Da to 600 Da.
20. The process of claim 17 , wherein the purity of the 1,4:3,6-dianhydrohexitol is at least 98.5%.
21. The process of claim 17 , wherein the polyol starter further comprises a polycyclic polyether polyol.