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Composite heat stabilizer for polyvinyl chloride (PVC), and preparation method for composite heat stabilizer

A composite heat stabilizer and stabilizer technology, applied in the chemical industry, can solve the problems of not getting rid of the dependence on lead salt stabilizers, and achieve the effects of reducing operator poisoning, reducing production costs, and improving thermal stability

Active Publication Date: 2012-05-02
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the amount of lead salt used has been greatly reduced, there are still many deficiencies in terms of thermal stability, heat resistance, and plasticization promotion, and the dependence on lead salt stabilizers has not been eliminated.

Method used

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  • Composite heat stabilizer for polyvinyl chloride (PVC), and preparation method for composite heat stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Prepare the main stabilizer 3-dodecylmercaptopropionic acid metal soap stabilizer according to the following formula and method:

[0025] Formula: 100 parts of acrylic acid, 250 parts of a mixed solvent formed by mixing absolute ethanol and isopropanol with a mass ratio of 1:1, 160 parts of sodium hydroxide solution with a mass fraction of 37.5%, 255 parts of n-dodecanethiol, mass The fraction is 26.74% chloride (Ca 2+ / Zn 2+ The molar ratio is 2:1) solution 273 parts, deionized water 200 parts.

[0026] Preparation method: 250 parts of a mixed solvent obtained by mixing 100 parts of acrylic acid, absolute ethanol and isopropanol at a ratio of 1:1 is added to the reaction kettle, 160 parts of sodium hydroxide solution with a mass fraction of 37.5% is added dropwise, and the temperature is controlled at 35 Between ~40°C, the controlled dropping time is about 2 hours; then slowly add 255 parts of n-dodecanethiol dropwise, the controlled dropping time is about 3 hours...

Embodiment 2

[0031] Except that in step 1, the solvent was replaced with 250 parts of mixed solvents formed by mixing n-propanol and absolute ethanol with a mass ratio of 1:1, all the others were the same as in Example 1.

Embodiment 3

[0033] Except that in step 2, the phosphite compound was replaced by 3 parts of phenylenedi-isooctyl phosphite, the rest were the same as in Example 1.

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Abstract

The invention belongs to the field of chemical industry and particularly relates to a composite stabilizer for polyvinyl chloride (PVC) processing. The composite stabilizer consists of the following components in part by weight: 55 to 105 parts of main stabilizer, 0.255 to 11 parts of auxiliary stabilizer, and 10 to 35 parts of inorganic filler. The main stabilizer is a 3-dodecylthiopropionic acid metal soap stabilizer, and the chemical formula of the metal soap stabilizer is [CH3(CH2)11S(CH2)2COO]mXn, wherein X is one or more of calcium ion, zinc ion, barium ion or magnesium ion; and the metal soap stabilizer consists of 5 to 20 weight parts of metal ion and 50 to 85 parts of sulfur-containing carboxylate group. The composite stabilizer has the advantages of high thermal stability, safety and no toxicity, certain processability and lubricity and low cost.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a composite stabilizer for PVC processing and a preparation method thereof. Background technique [0002] Heat stabilizers are widely used in the polyvinyl chloride industry to improve thermal stability, heat resistance and processability during the processing of polyvinyl chloride products. As a widely used and good performance lead salt series heat stabilizer, it has a long history. The most common commercial products are dibasic lead phosphite and tribasic lead sulfate. Because of its lead content as high as more than 80%, it not only pollutes the environment during production and use, but also causes lead poisoning of operators. Such heat stabilizers have poor dispersibility in PVC processing, and corresponding dispersants and lubricants must be added. Although in recent years many manufacturers have coated or made composites. However, the problems of high lea...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K13/02C08K5/00C08K5/372C08K5/524C08K5/1515C08K5/07C08K3/26C07C323/52C07C319/18
Inventor 呼建强刘春信张海瑜张振国冯健
Owner SHANDONG RUIFENG CHEM
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