Organic complex zinc composite heat stabilizer for PVC and preparation method thereof

A composite heat stabilizer and organic complexing technology, which is applied in the field of PVC processing aids, can solve the problem that the thermal stability of calcium/zinc heat stabilizers cannot meet the application requirements, limit the application field of calcium/zinc composite heat stabilizers, reduce the Operability and other issues, to achieve good stability, reduce balance torque, easy to operate

Inactive Publication Date: 2017-06-16
河北雄发新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the strengthening of environmental protection awareness, PVC heat stabilizers are developing in the direction of low toxicity, no pollution, and high efficiency. Therefore, calcium / zinc heat stabilizers have become the main direction of PVC heat stabilizer research. However, at present, calcium / zinc heat stabilizers The phenomenon of "zinc burning" is very easy to occur after the stabilizer is used in PVC. In the face of this situation, it is of great significance to develop a new generation of PVC calcium / zinc heat stabilizer
[0004] The thermal stability of a single calcium / zinc heat stabilizer cannot meet the application requirements. Usually, in order to improve its thermal stability, it is necessary to add some auxiliary heat stabilizers, mainly stearic acid, polyol, hydrotalcite, zeolite, PE wax
But the effect is still limited, so that the application field of calcium / zinc composite heat stabilizer is limited
[0005] CN1299392A discloses a zinc acetylacetonate that can improve the stability of PVC, but due to the ZnCl generated by the action of zinc acetylacetonate and PVC 2 It is a Lewis acid, which can catalyze the removal of HCl from PVC. Excessive dosage will promote the decomposition of PVC, resulting in "zinc burning"
CN101565364B discloses a kind of synthetic method of diketone metal salt, but wherein used strong alkali sodium hydroxide, greatly reduced operability

Method used

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  • Organic complex zinc composite heat stabilizer for PVC and preparation method thereof
  • Organic complex zinc composite heat stabilizer for PVC and preparation method thereof
  • Organic complex zinc composite heat stabilizer for PVC and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Put 17g of zinc carbonate and 100mL of absolute ethanol into a flask equipped with condensing reflux, heat to reflux, add 60g of dibenzoylmethane to the solution, and react at reflux for 2h. After the reaction is complete, unreacted zinc carbonate is removed by filtration, and the filtrate is cooled to obtain pale yellow needle-shaped organic complex zinc.

[0033] 50g of organic complex zinc, 60g of calcium stearate and 10g of stearic acid are mixed to obtain composite thermal stabilizer A.

Embodiment 2

[0035] Put 86g of zinc stearate and 200mL of ethanol into a flask equipped with condensing reflux, heat to reflux, add 60g of dibenzoylmethane to the solution, and react under reflux for 3h. After the reaction is complete, unreacted zinc stearate is removed by filtration, and the filtrate is cooled to obtain pale yellow needle-shaped organic complex zinc.

[0036] 50g of organic complex zinc, 60g of calcium stearate, and 3g of sorbitol were mixed to obtain composite thermal stabilizer B.

Embodiment 3

[0038] Put 25g of zinc acetate and 100mL of methanol into a flask equipped with condensing reflux, heat to reflux, add 60g of dibenzoylmethane to the solution, and react at reflux for 3h. After the reaction is complete, unreacted zinc stearate is removed by filtration, and the filtrate is cooled to obtain pale yellow needle-shaped organic complex zinc.

[0039] 50g of organic complex zinc, 60g of calcium stearate and 12g of hydrotalcite were mixed to obtain composite thermal stabilizer C.

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Abstract

The invention provides organic zinc complex compound heat stabilizer used for PVC and a preparation method of the organic zinc complex compound heat stabilizer. The compound heat stabilizer is prepared from main stabilizer and auxiliary heat stabilizer, wherein the mass ratio of the main stabilizer to the auxiliary heat stabilizer is 0.9-3.0 to 0.1-1.0, organic zinc complex and calcium stearate serve as the main stabilizer, and the auxiliary heat stabilizer is selected from at least one of stearic acid, polyhydric alcohols, hydrotalcite and zeolite. The organic zinc complex compound heat stabilizer has the advantages that when the compound heat stabilizer is used as stabilizer for processing PVC and other plastic, the compound heat stabilizer is not easy to separate out and the stabilization effect is good.

Description

technical field [0001] The invention belongs to the technical field of PVC processing aids, and in particular relates to an organic complex zinc composite heat stabilizer for PVC and a preparation method thereof. Background technique [0002] In recent years, with the development of modern science and technology, polymer materials are more and more favored by people. PVC resin is widely used in construction, light industry, chemical industry, Electronics, aerospace, automobiles, agriculture and other fields. However, there are defects in the structure of PVC, and thermal degradation is prone to occur during processing. Therefore, heat stabilizers are usually added to promote the plasticization and melting of PVC resin, improve melt strength, reduce processing temperature, and improve the appearance quality of products. Improve various performance indicators of PVC products and expand its application fields. [0003] At present, heat stabilizers can be mainly divided into b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/00C08K5/098C08K5/09C08K5/053C08K3/26
Inventor 陈焕章沈杰张灿明
Owner 河北雄发新材料科技发展有限公司
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