Bismaleamic acid-based calcium-zinc composite heat stabilizer, preparation method and application

A technology of maleamic acid-based calcium-zinc and composite thermal stabilizers, which is applied in the direction of calcium organic compounds, zinc organic compounds, and 2/12 group organic compounds without C-metal bonds, etc., which can solve the problem of insufficient stability and thermal stability The agent contains heavy metals, the process is complicated, etc., and achieves good anti-initial coloring effect

Active Publication Date: 2018-08-28
XIAN UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The invention provides an environmentally friendly, non-toxic and highly efficient ethylenediamine bismaleamic acid-based calcium-zinc composite heat stabilizer and a preparation method thereof, which are used to overcome the shortcomings of existing heat stabilizers that contain heavy metals, complex processes, and high prices. And in view of the lack of stability of the current calcium-zinc composite heat stabilizer, the calcium-zinc complex was prepared with ethylenediamine bismaleamic acid as the matrix, providing a non-toxic, environmentally friendly, efficient and low-cost new polyvinyl chloride compound. Calcium / zinc long-term composite heat stabilizer, alleviates the "zinc burning" phenomenon caused by the addition of metal zinc heat stabilizers, and has good initial coloring

Method used

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  • Bismaleamic acid-based calcium-zinc composite heat stabilizer, preparation method and application
  • Bismaleamic acid-based calcium-zinc composite heat stabilizer, preparation method and application
  • Bismaleamic acid-based calcium-zinc composite heat stabilizer, preparation method and application

Examples

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Embodiment 1

[0027] Using maleic anhydride as a raw material, maleic anhydride and ethylenediamine were dissolved in acetonitrile at a ratio of 2:1, and the acetonitrile solution of maleic anhydride was added dropwise to acetonitrile under ice-water bath conditions. In the acetonitrile solution of diamine, fully stirred and reacted for 3 hours, then filtered with suction, washed with absolute ethanol three times, and dried under vacuum at 40°C. Get ethylenediamine bismaleamic acid;

[0028] Reaction of ethylenediamine bismaleamic acid with sodium hydroxide of 2 times the amount of the substance in methanol solution to obtain a methanol solution of ethylenediamine bismaleamic acid sodium, adjust the pH value to 7-8, and then add to it Add calcium chloride methanol solution drop by drop, stir and reflux reaction at 100°C to obtain white precipitate, wash and dry the product to constant weight to obtain calcium ethylenediamine bismaleamate;

[0029] Reaction of ethylenediamine bismaleamic ac...

Embodiment 2

[0032] The specific preparation method is the same as that of Example 1, except that calcium ethylenediamine bismaleamate and zinc ethylenediamine bismaleamate are compounded according to a mass ratio of 1:2.

Embodiment 3

[0034] The specific preparation method is the same as that of Example 1, except that calcium ethylenediamine bismaleamate and zinc ethylenediamine bismaleamate are compounded at a mass ratio of 1:3.

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Abstract

The invention provides a bismaleamic acid-based calcium-zinc composite heat stabilizer, which is composed of two different complexes shown in the chemical formula [M(H2O)2L], wherein: M is selected from Ca or Zn, L is ethylenediamine bismaleamic acid group, and n is selected from 1 or 2. The bismaleamic acid-based calcium-zinc composite heat stabilizer provided by the present invention effectively improves the "zinc burning" phenomenon caused by the use of metal zinc heat stabilizers in the prior art as polyvinyl chloride heat stabilizers, and has good resistance to initial coloration.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a bismaleamic acid-based calcium-zinc composite heat stabilizer and a preparation method thereof, and is a funded achievement of a general project of the National Natural Science Foundation of China (approval number: 51173145). Background technique [0002] Polyvinyl chloride is widely used because of its advantages of flame resistance, corrosion resistance, low cost and good transparency, but it has the disadvantage of poor thermal stability during processing, and it is prone to self-catalytic reaction of removing HCl to form a conjugated polyene structure , causing its color to deepen and its mechanical properties to decline. Therefore, a heat stabilizer must be added during processing to inhibit its thermal degradation. Currently commonly used PVC heat stabilizers are mainly divided into lead salts, metal soaps, organic tin, rare earth, organic antimony m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/20C07F3/04C07F3/06
CPCC07F3/003C08K5/20C08K2201/014C08L2201/08C08L27/06
Inventor 李侃社李苗梁耀东康洁牛红梅汪晓芹闫兰英陈创前章结兵李锦朱雪丹
Owner XIAN UNIV OF SCI & TECH
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