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Hydrotalcite-maleic acid rare earth composite environmental protection stabilizer for PVC, and preparation method thereof

An environmentally friendly stabilizer and rare earth composite technology, which is applied in the field of PVC additives, can solve the problems of poor coloring, low thermal stability, and can not be the main stabilizer alone, achieve low cost, improve heat resistance and mechanical properties, and improve The effect of thermal stabilization

Inactive Publication Date: 2016-02-03
HWASU
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Rare earth heat stabilizers have good thermal stability, but the early thermal stability is not high, and the initial coloring is poor, so they cannot be the main stabilizer alone, so their application and promotion are limited. The application of a single rare earth heat stabilizer is often difficult to meet the needs of PVC processing. Composite and multi-functional rare earth heat stabilizers have become the development trend according to the requirements of application performance

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A PVC hydrotalcite-maleic acid rare earth composite environmental stabilizer, which is prepared from the following component raw materials by weight (kg): modified zinc-aluminum hydrotalcite 23, tin methyl mercaptide 18111, lanthanum maleate 7, Diphenyl-isooctyl phosphite 2, calcium stearate 4, epoxy fatty acid methyl ester 3, n-butyl methacrylate 18, polyvinyl alcohol 1, 2-hydroxy-4-methoxybenzophenone 2 , wollastonite powder 8,

[0018] The preparation method is as follows:

[0019] (1) Preparation of modified hydrotalcite:

[0020] a. Take a certain amount of Zn(NO3)2 6H2O and Al(NO3)3 9H2O and add it into water to make a salt solution with a total molar concentration of 0.6mol / L, and take a certain amount of NaOH and Na2CO3 into deionized water to make it The total molar concentration is 0.6mol / L alkali solution, drop the alkali solution into the salt solution at a speed of 1-2 drops / s, N 2 Stir vigorously under protection, keep the constant temperature at 38-42°...

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Abstract

The present invention provides a hydrotalcite-maleic acid rare earth composite environmental protection stabilizer for PVC, wherein the hydrotalcite-maleic acid rare earth composite environmental protection stabilizer is prepared from the following raw materials by weight: 20-30 parts of modified zinc aluminum hydrotalcite, 10-12 parts of methyl tin mercaptide 181, 6-9 parts of lanthanum maleate, 1-3 parts of diphenyl isooctyl phosphite, 3-6 parts of calcium stearate, 2-4 parts of epoxy fatty acid methyl ester, 16-20 parts of n-butyl methacrylate, 1-2 parts of polyvinyl alcohol, 1-2 parts of 2-hydroxy-4-methoxybenzophenone, and 5-10 parts of wollastonite powder. According to the present invention, the PVC stabilizer has characteristics of good thermal stability, good processing performance, environmental protection, no toxicity, low cost, good plasticity and balance torque reducing during the PVC processing process, and low cost.

Description

technical field [0001] The invention relates to the field of PVC additives, in particular to a PVC hydrotalcite-maleic acid rare earth composite environmental-friendly stabilizer and a preparation method thereof. Background technique [0002] With its superior physical properties and low cost, PVC is widely used in chemical industry, materials, machinery, agriculture, daily necessities and other fields, especially in the field of plastics, and is known as one of the five general-purpose plastics. However, PVC has a very important defect, that is, it is easy to decompose and generate HCl gas during thermal processing, and self-catalysis leads to severe degradation of PVC, which affects various properties of PVC products, such as discoloring PVC products or reducing its mechanical properties. In order to overcome this defect of PVC, it is mainly to add an appropriate amount of stabilizer during the thermal processing of PVC. [0003] The only heat stabilizers that are general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L29/04C08K13/06C08K9/04C08K3/26C08K5/57C08K5/098C08K5/526C08K3/34
Inventor 王圣茂丘永桂宋开生高旭李毅徐明肖独山孙荣兴
Owner HWASU