- A method for the synthesis of multi-hydroxy stearate
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The invention discloses a synthesis method of polyhydroxy stearate and application of the polyhydroxy stearate in PVC (polyvinyl chloride) resin heat stabilizers. The existing alkaline process for preparing 9,10-bis-hydroxystearic acid is complex in after-treatment, and no one has applied bis-hydroxystearate to PVC heat stabilizers. The invention is characterized in that in the polyhydroxy stearic acid synthesis, fatty acid, acetic acid and 40 wt% hydrochloric acid are added into the reaction vessel, wherein the fatty acid is one or mixture of more of oleic acid, linoleic acid and linolenic acid; in the system, the mass ratio of fatty acid to anhydrous acetic acid 30% to oxydol is 1:(0.5-2):(1-3.5); and in the reaction system, the mass ratio of anhydrous acetic acid to water is 1:(2.0-3.0). In the synthesis method, the product can be directly precipitated from the system, thereby simplifying the after-treatment.
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Paragraph 0032; 0033
(2016/12/01)
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