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A kind of diameter-thickness ratio controllable hydrotalcite PVC composite heat stabilizer and preparation method thereof

A composite thermal stabilizer and diameter-to-thickness ratio technology, which is applied in the field of diameter-to-thickness ratio controllable hydrotalcite PVC composite thermal stabilizer and its preparation field, can solve problems such as insufficient thermal stability, and achieve abundant raw materials and good long-term thermal stability. performance, simple effects

Active Publication Date: 2020-10-02
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of insufficient hydrotalcite-based thermal stability, provide a controllable diameter-thickness ratio hydrotalcite PVC composite thermal stabilizer, and improve the initial and long-term thermal stability of the hydrotalcite thermal stabilizer

Method used

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  • A kind of diameter-thickness ratio controllable hydrotalcite PVC composite heat stabilizer and preparation method thereof
  • A kind of diameter-thickness ratio controllable hydrotalcite PVC composite heat stabilizer and preparation method thereof

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Embodiment 1-3

[0023] Under continuous stirring, will contain 0.025mol Mg(NO 3 ) 2 ·6H 2 O and 0.0125mol Al(NO 3 ) 3 9H 2 50 mL of mixed metal salt solution of O was added dropwise to Na at a fixed rate 2 CO 3 solution (0.5mol / L, 50mL). At the same time, 2mol / L NaOH solution was added dropwise to control the pH of the reaction solution at about 10. After the dropwise addition was completed, the suspension was placed in a 50mL Teflon container in a stainless steel reactor, and a steel shell was put on to ensure that the mixed solution was completely sealed in the reactor. Then place the reaction kettle in an oven at 150°C for reaction, take out the reaction kettle after a certain period of time, wash, filter, and dry to obtain high-purity hydrotalcite with controllable diameter-thickness ratio.

[0024] According to the above method, control the reaction time at 4h, 24h, and 168h respectively to obtain aspect ratio controllable hydrotalcites with aspect ratios of 4.2, 3.7, and 2.8, re...

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Abstract

The invention discloses a PVC compound thermal stabilizer comprising hydrotalcite with a controllable radius-thickness ratio and a production method of the hydrotalcite with the controllable radius-thickness ratio. The compound thermal stabilizer comprises the components in parts by mass: 20-60 parts of the hydrotalcite with the controllable radius-thickness ratio, 15-55 parts of calcium soap, 5-40 parts of zinc soap, 15-35 parts of a lubricant, 1-6 parts of an antioxidant, 1-6 parts of a light stabilizer and 4-12 parts of a chelating agent. By carrying out a 180-DEG C static thermal ageing experiment on polyvinyl chloride in which the compound thermal stabilizer comprising the hydrotalcite with the controllable radius-thickness ratio is added, a result shows that the provided compound thermal stabilizer comprising the hydrotalcite with the controllable radius-thickness ratio can effectively improve the thermal stability performance of the PVC, and thermal stability time reaches 250 min or more. The produced compound thermal stabilizer can replace traditional lead salts and expensive organotin thermal stabilizers, and thus is applied to a wide variety of fields of PVC pipes, profiles, electric wires, medical instruments, films and the like.

Description

technical field [0001] The invention belongs to the technical field of composite heat stabilizer preparation, in particular to a hydrotalcite PVC composite heat stabilizer with controllable diameter-thickness ratio and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is a kind of polymer material with excellent comprehensive properties. It is widely used in agriculture, construction, communication and daily necessities because of its advantages such as high strength, high dielectric properties, wear resistance and low price. multiple fields. my country's PVC production exceeded 10 million tons in 2010, and reached 16.69 million tons in 2016, ranking first in the world and continuing to increase. However, since the processing temperature is higher than the decomposition temperature, it is easy to decompose during the processing, which reduces its physical properties and mechanical properties, which limits its use to a certain extent. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L91/06C08K3/26C08K5/098C08K5/134C08K5/13C08K5/09
CPCC08L27/06C08L2201/08C08L91/06C08K3/26C08K5/098C08K5/1345C08K5/13C08K5/09
Inventor 宋宇飞谢放常文陈伟
Owner BEIJING UNIV OF CHEM TECH