A kind of preparation method of PVC plasticizer

Abstract

The invention discloses a method for preparing a PVC plasticizer. The method comprises the following steps: (1) firstly, diethylene glycol dibenzoate, dipentaerythritol, a catalyst and terephthalic acid are mixed and uniformly stirred at normal pressure under nitrogen protection condition, and then glycerol triacetate, polyvinyl chloride and the epoxidized soybean oil are continuously stirred under the protection of nitrogen at normal temperature to obtain a mixture; (2) the mixture obtained in the step (1) is mixed to obtain a mixed material; and (3) the mixed material obtained in the step (2) is cooled to room temperature to obtain a finished product. The plasticizer controls the ratio of various components in the preparation process to make the prepared PVC plasticizer have excellent impact resistance, weather resistance and insulation, can be widely used in medical equipment, food packaging, toys, artificial leather and the like, greatly reduces the loss and pollution in the processing of the products, and reduces the cost of the product.

Description

technical field [0001] The invention relates to the technical field of plasticizing processing, in particular to a preparation method of a PVC plasticizer. Background technique [0002] Plasticizer is the largest production and consumption variety of processing aids in the plastics industry. Its output accounts for about 60% of the total plastic additives. It is mainly used in polyvinyl chloride products, and its consumption accounts for 80% of the total plasticizers. %. At present, the plasticizers used by the vast majority of plastic companies in my country are DOP (dioctyl phthalate), DINP (diisononyl phthalate) and DBP (dibutyl phthalate), etc. Plasticizers are also widely used in soft products such as PVC hoses, artificial leather, and films. Since the content of some metal elements in plasticizers exceeds the standard, strictly speaking, they are not new environmental protection materials, and it is difficult to meet the requirements in many properties, especially low...

AI Technical Summary

Problems solved by technology

In 2005, the European Union issued a warning: DOP is contained in the baby bottle teat originating in China, which does not meet the relevant hygienic standards and is prohibited from sale.

But the electrical insulation performance of this plasticizer still has not reached the ideal level in this field, and the durability of this plasticizer is relatively poor

[0007] To sum up, most of the plasticizers disclosed in the prior art are excellent in single performance, but their comprehensive performance is often relatively poor. Although some products have improved various performances, the degree of improvement still cannot meet market demand. Therefore, it is necessary to develop a plasticizer with less toxic substance content, good plasticizing effect, excellent electrical insulation, impact resistance and durability for the PVC field

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