Method for preparing processinga id for rare earths of a sort of polyvinyl chloride

Abstract

A process for preparing the stabilizer of PVC includes such steps as esterifying reaction between castor oil and maleic anhydride, dissolving lanthanum oxide in diluted hydrochloric acid, and dripping said esterified substance into said solution. It can improve the machinability and strength of PVC product.

Description

technical field [0001] The invention relates to a preparation method of a rare earth stabilizer. Background technique [0002] Our country is one of the countries with the richest rare earth resources. Rare earth materials are generally stabilizers of polyvinyl chloride as polymer processing aids. Rare earth additives have incomparably superior performance as the processing stability of polyvinyl chloride, such as reducing the use of lead stabilizers, which is conducive to the environmental protection of products, making polyvinyl chloride processing easier, and has long-term thermal stability. The filler has a unique coupling effect, etc., which reduces processing costs. [0003] But at present, the organic components of rare earth stabilizers are generally organic acids with small molecular weight, such as stearic acid, etc., which may easily cause the migration and precipitation of rare earth stabilizers, thereby affecting the long-term stability of the product. Migrat...

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Problems solved by technology

[0003] However, at present, the organic components of rare earth stabilizers are generally organic acids with small molecular weight, such as stearic acid, etc., which may easily cause the migration and precipitation of rare earth stabilizers, thus affecting the long-term stability of the product