Epoxidized calcium-zinc oleate compound stabilizer and preparation method thereof

Abstract

The invention relates to epoxidized calcium-zinc oleate compound stabilizer and a preparation method thereof, and belongs to the technical field of PVC processing agent. The stabilizer is prepared by the following steps that: oleic acid, glacial acetic acid or formic acid, concentrated sulfuric acid or p-toluene sulfo acid, and hydrogen peroxide are added into a reactor to conduct epoxidation reaction so as to obtain epoxidized oleic acid, wherein the reaction temperature is 45-65 DEG C, and the reaction time is 2-3 hours; alkali wash is carried out, that is, the prepared epoxidized oleic acid is subjected to alkali wash by diluted sodium bicarbonate solution and is then washed by water to the PH of 6-8, then reduced pressure distillation is conducted to remove water; metal ions and catalyst are added into the epoxidized oleic acid which is subjected to alkali wash for reaction, finally lubricant is added into the mixture, and then the mixture is discharged and cut into slices after being stirred uniformly so as to prepare the epoxidized calcium-zinc oleate compound stabilizer. The stabilizer has excellent plasticizer and stability, and the preparation method provided by the invention is excellent instability and is easy to operate.

Description

technical field [0001] The invention relates to a novel high-efficiency and environment-friendly calcium-zinc composite stabilizer. The basic composition of the calcium-zinc stabilizer is calcium / zinc epoxy oleate, and specifically relates to a calcium-zinc epoxy oleate composite stabilizer and a preparation method thereof, belonging to PVC processing Auxiliary technology field. Background technique [0002] As one of the five general-purpose plastics, polyvinyl chloride is widely used in various fields of industrial and agricultural production because of its low price and excellent performance. However, due to the special structure of polyvinyl chloride, it will inevitably decompose at the processing temperature, resulting in a decrease in performance, until it loses its use value. In order to prevent PVC from degrading during processing, heat stabilizers need to be added. Commonly used heat stabilizers include lead salts, metal soaps, rare earths, organic tin, calcium-zi...

AI Technical Summary

Problems solved by technology

With the global environmental protection requirements, heat stabilizers are developing in the direction of low toxicity, non-toxicity, harmlessness, high efficiency, and compound multifunctionality. Although lead salt stabilizers have excellent thermal stability, they are toxic Large, and extremely harmful to human health; metal soaps are usually used together, and most of them also contain heavy metal components, which are easy to precipitate during processing and have low stabilization efficiency; organotin stabilizers can maintain high transparency for transparent products, and the dosage Less, but the price is expensive, and many have a bad smell. Although the traditional calcium-zinc composite heat stabilizer has always been one of the directions for the non-toxicity of PVC heat stabilizers, the problem of unstable thermal stability efficiency has always existed. Therefore, the development and development of low / non-toxic, high-efficiency, and low-cost environmentally friendly stabilizers has become an urgent issue in the field of PVC processing.

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