Castor oil is a triglyceride of fatty acids. Castor oil is found in castor beans In the seeds, its content is 35% to 57.%. “Castor oil is obtained by squeezing or solvent extraction. It is almost colorless or slightly yellow, clear and viscous liquid; has a slight odor; has a light taste and then is slightly pungent, and is easily soluble in ethanol. , can be mixed with absolute ethanol, chloroform, ether or glacial acetic acid, and should be widely used in coatings.
The application of castor oil in plasticizers:
Thermal cracking of castor oil can produce sebacic acid, which undergoes an esterification reaction with the corresponding alcohol to produce a series of low-temperature resistant plasticizers. Azelaic acid can be produced by oxidizing castor oil with nitric acid, and then azelaic acid ester can be synthesized. This is a plasticizer with better performance.
Epoxyacetyl ricinoleic acid methyl ester can be obtained by esterification of methyl ricinoleic acid and then acetylation and epoxidation, so that castor oil and acetic acid can be combined under normal conditions. The pressed epoxidation product is epoxidized castor oil, its comprehensive performance is equivalent to that of epoxidized soybean, and is widely used as a plasticizer and stabilizer for PVC.
Introduction of -SO3NA-with PO 3NA-group has excellent plasticizing effect when used in plastic products.
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