Claims
- 1. A process for preparing a Mannich polyol having a viscosity of from 300 to 3,500 cps (0.3 to 3.5 Pa*s) at 25° comprising the steps of admixing a phenol, an alkanolamine, and formaldehyde at a molar ratio of 1:1:1 to 1:2.2:2.2 to prepare a Mannich base and then alkoxylating the Mannich base with an admixture of ethylene oxide and propylene oxide under reaction conditions sufficient to prepare a Mannich polyol wherein the minimum amount of alkylene oxide used is 0.3 moles per hydroxyl group in the Mannich base, about 5 to 55 percent of the weight of the ethylene oxide and propylene oxide is ethylene oxide and the Mannich polyol has an OH number of from 250 to 350.
- 2. The process of claim 1 wherein the alkanolamine is diethanolamine.
- 3. The process of claim 1 having the additional step of stripping water from the Mannich base prior to alkoxylation.
- 4. The process of claim 1 wherein the admixture of ethylene oxide and propylene oxide is at least 50 weigh percent of the total alkylene oxides used.
- 5. The process of claim 4 wherein of the combined weight of ethylene oxide and propylene oxide, from about 10 to about 45 percent of that weight is ethylene oxide.
- 6. The process of claim 4 wherein of the combined weight of ethylene oxide and propylene oxide, from about 15 to about 30 percent of that weight is ethylene oxide.
- 7. The process of claim 4 wherein of the combined weight of ethylene oxide and propylene oxide, 20 percent of that weight is ethylene oxide.
- 8. The process of claim 1 wherein the maximum amount of alkylene oxides used is 3.5 moles per hydroxyl group in the Mannich base.
- 9. The process of claim 1 wherein a supplemental catalysts is used to prepare a polyol a Mannich polyol having an OH number of from 250 to 350.
- 10. A Mannich polyol having a viscosity of from 300 to 3,500 cps (o.3 to 3.5 Pa*s) at 25° C. and an OH number of about 250 to 500.
- 11. The Mannich polyol of claim 10 wherein the Mannich polyol has a viscosity of from 300 to 1500 cps (0.3 to 1.5 Pa*s).
- 12. The Mannich polyol of claim 11 wherein the Mannich polyol has a viscosity of from 300 to 1000 cps (0.3 to 1.0 Pa*s).
- 13. The Mannich polyol of claim 12 wherein the Mannich polyol has an OH number of from about 280 to about 450.
- 14. The Mannich polyol of claim 12 wherein the Mannich polyol has an OH number of from about 300 to about 400.
CROSS REFERENCE
This application claims the benefit of U.S. Provisional Application No. 60/099,714, filed on Sep. 10, 1998.
US Referenced Citations (38)
Foreign Referenced Citations (2)
Number |
Date |
Country |
23 64 861 |
Jul 1975 |
DE |
0 398 147 A2 A3 |
Nov 1990 |
EP |
Non-Patent Literature Citations (2)
Entry |
Chemical Abstracts, vol. 117, No. 26, Dec. 1992. |
Papa, et al., “Hybrid Phenolic/Urethane Foams,” Journal of Cellular Plastics, Sep./Oct., 1979. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/099714 |
Sep 1998 |
US |