Claims
- 1. In a process for the preparation of polyether-ester polyols by the reaction of a polyether polyol and an organic compound containing both ethylenic unsaturation and an anhydride group wherein said reaction comprises reacting
- (a) a polyether polyol,
- (b) an organic compound containing both ethylenic unsaturation, and an anhydride group forming a half ester,
- (c) further reacting with an alkylene oxide to obtain a product with an acid number of 5 mg KOH/gm or less, the improvement which comprises conducting said reactions in the presence of an effective amount of a catalyst selected from the group consisting of calcium naphthenate and cobalt naphthenate.
- 2. The process of claim 1 wherein the concentration of the catalyst employed is from 0.005 to 0.5 weight percent based on the weight of polyol.
- 3. The process of claim 1 wherein the polyether polyol is the reaction product of a polyhydric alcohol and an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and butylene oxide.
- 4. The process of claim 1 wherein the alkylene oxide is ethylene oxide.
- 5. The process of claim 1 wherein the alkylene oxide is propylene oxide.
- 6. The process of claim 1 wherein the reaction temperature is from about 75.degree. C. to about 175.degree. C.
- 7. The process of claim 1 wherein the polyether-ester polyol contains fumarate unsaturation.
- 8. The process of claim 1 wherein the organic compound is maleic anhydride.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 364,336, filed Apr. 1, 1982.
US Referenced Citations (8)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
364336 |
Apr 1982 |
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