Claims
- 1. A method of preparing a polyether polyol useful in making a polyisocyanurate polymer, which comprises the steps of oxyalkylating an alcohol having a functionality of two or three by the catalytic addition of an alkylene oxide to said alcohol in presence of an oxyalkylating catalyst selected from the group consisting of aminophenols, hexahydro-s-triazines and tetrahydrooxadiazines.
- 2. The method of claim 1 wherein said oxyalkylating is carried out at a temperature of 50-200.degree. C.
- 3. The method of claim 1 wherein said oxyalkylating catalyst is 2,4,6-tris(dimethylaminomethyl)phenol.
- 4. The method of claim 1 wherein said oxyalkylating catalyst is 1,3,5-tris(N,N-dimethylaminopropyl) hexahydro-s-triazine.
- 5. The method of claim 1 wherein said oxyalkylating catalyst is 1-(2-hydroxyethyl)-3,5,-bis(N,N-dimethylaminopropyl) hexahydro-s-triazine.
- 6. The method of claim 1 wherein said oxyalkylating agent is ethylene oxide.
- 7. The method of claim 1 wherein said oxyalkylating agent is propylene oxide.
- 8. The method of claim 1 wherein said oxyalkylating agent is a mixture of propylene oxide and ethylene oxide.
- 9. The method of claim 1 wherein said catalyst is employed in an amount ranging from about 0.1% to about 2% based on the weight of the alcohol reactant.
- 10. The method of claim 9 wherein said catalyst amount is 0.3-1%.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 916,991 filed June 19, 1978 and now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3357970 |
Wyatt et al. |
Dec 1967 |
|
3745133 |
Comunale et al. |
Jul 1973 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
916991 |
Jun 1978 |
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