Method for synthesizing PVC thermal stabilizer dicarboxylic acids rear earth salt and uses thereof

A technology of dibasic carboxylic acid and heat stabilizer, which is applied in the preparation of carboxylate and other directions to achieve the effects of promoting plasticization, low price and long-term thermal stability improvement

Inactive Publication Date: 2008-06-18
ANHUI UNIVERSITY
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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of synthetic method and application of PVC heat stabilizer dibasic carboxylic acid rare earth salt, thereby overcome the defective of PVC heat stabilizer used at present

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  • Method for synthesizing PVC thermal stabilizer dicarboxylic acids rear earth salt and uses thereof

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preparation example Construction

[0023] (1) Preparation of dibasic carboxylic acid rare earth normal salt

[0024] Soluble rare earth inorganic salts, alkalis, and dicarboxylic acids participate in the reaction according to the molar ratio of 1:2.5-3.5:1.2-2. First, dissolve the dicarboxylic acids and alkalis with equal volumes of absolute ethanol, and put them into two drops funnel, then dissolve the soluble rare earth inorganic salt with absolute ethanol and add it to the three-necked flask, and simultaneously add 0.01-0.1 molar parts (the soluble rare earth inorganic salt is 1 molar part) hydrogen peroxide, and place the three-necked flask in a constant temperature water tank. Use electric stirring and dropping funnel. After heating to the specified temperature, start stirring, then add dicarboxylic acid and alkali dropwise at the same time, and control the dropping speed so that both are added dropwise at the same time, and continue to react for 30 minutes. After the reaction is completed, the product is ...

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Abstract

The present invention discloses a synthetic method of PVC thermal stabilizer dyadic carboxylic acid rare-earth salt. The method is characterized in that absolute ethyl alcohol is solvent; hydrogen peroxide is reducing agent; soluble rare-earth inorganic salt, alkali and dyadic carboxylic acid are reacted according to the mol ratio of 1: 2.5-3.5:0.3-2 under the temperature of 40 to 80 DEG C so as to produce the dyadic carboxylic acid rare-earth salt. The purpose is to be used as the thermal stabilizer of PVC plastic processing. The dyadic carboxylic acid rare-earth salt as the thermal stabilizer provided by the present invention not only overcomes the settlement of the prior thermal stabilizer but also increases the preliminary tinctorial property and long-term thermal stability; in addition, the present invention also greatly promotes the PVC plastication and has low cost, therefore, the present invention has the prospect of industrial application.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, in particular to a synthesis method of a PVC heat stabilizer dibasic carboxylic acid rare earth salt and a new application of the dibasic carboxylic acid rare earth salt. Background technique [0002] This year, with the continuous increase in the amount of PVC materials in my country, the demand for PVC heat stabilizers has also increased. At present, the commonly used PVC heat stabilizers in my country mainly include lead salt heat stabilizers, metal soap heat stabilizers, organic tin heat stabilizers and rare earth heat stabilizers. Lead salt stabilizers have excellent thermal stability, strong ability to absorb HCl, excellent electrical insulation, good processability, suitable for various processing techniques, and have the effect of white pigments, low price, but lead salt heat stabilizers are toxic, Lack of lubricity, and black PbS will be formed when encountering sulfur (S), so it...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/09C08L27/06C07C51/41
Inventor 杨建军李萌吴明元张建安吴庆云
Owner ANHUI UNIVERSITY
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