Solvent-blown rigid urethane foams from castor-based polyols
| Autor: | Vilma H. Garrett, C. K. Lyon, Leo A. Goldblatt |
|---|---|
| Rok vydání: | 1961 |
| Předmět: |
0301 basic medicine
chemistry.chemical_classification 030109 nutrition & dietetics Materials science General Chemical Engineering Organic Chemistry 04 agricultural and veterinary sciences Polymer 040401 food science Solvent 03 medical and health sciences chemistry.chemical_compound 0404 agricultural biotechnology Silicone Compressive strength chemistry Polyol Castor oil medicine Glycerol Organic chemistry Prepolymer medicine.drug |
| Zdroj: | Journal of the American Oil Chemists' Society. 38:262-266 |
| ISSN: | 0003-021X |
| DOI: | 10.1007/bf02636773 |
| Popis: | The preparation of trichlorofluoromethane-blown rigid urethane foams using toluenediisocyanate and castor oil-derived polyols was investigated. The castor-based polyols included castor oil, hydroxylated castor oil, technical glycerol-, penta-erythritol-, and sorbitol monoricinoleates, and N,N-bis(2-hydroxyethyl) ricinoleamide. The last of these yielded the best foams when used as the sole polyol component added to the prepolymer. However better foams were obtained by using, as the polyol component, a mixture of a castor oil-derived polyol and a lower-molecular-weight polyol with a higher hydroxyl content. These polyol mixtures yielded more highly cross-linked polymers and hence foams with higher compressive strengths and less tendency to shrink after foaming. The effect of catalyst, silicone surfactant, and trichlorofluoromethane content was also investigated. An empirical relationship between density and compressive strength in a given foam system was derived. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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