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Preparation method of rare earth composite stabilizer for PVC

A rare earth compound and stabilizer technology, applied in the field of PVC stabilizers, can solve the problems of unproven light stability, lack of competitiveness, and reduction of manufacturing costs.

Inactive Publication Date: 2020-10-20
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, its light stability has not been proven, and when PVC materials are exposed to light for a long time, such stabilizers will not be competitive
[0004] At present, there is a lack of a rare earth composite stabilizer with both heat and light stability, which can achieve the effect of one agent with multiple uses, which not only greatly reduces the production cost, but also is easy to use

Method used

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  • Preparation method of rare earth composite stabilizer for PVC
  • Preparation method of rare earth composite stabilizer for PVC
  • Preparation method of rare earth composite stabilizer for PVC

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preparation example Construction

[0027] Preparation of lanthanum p-toluate

[0028] (1) Take 20g of lanthanum chloride and place it in a beaker, then add 100ml of dehydrated ethanol solution to dissolve it, and configure it into a 0.20g / ml dehydrated ethanol solution;

[0029] (2) Put 25 g of p-toluic acid in a beaker, add 500 ml of absolute ethanol to dissolve it, place the beaker in a constant temperature water bath, heat and stir, and prepare an absolute ethanol solution with a mass of 0.05 g / ml. Then slowly add the solution prepared in the above system, the reaction temperature is 60°C, and stir for 45 minutes;

[0030] (3) Use a peristaltic pump to add 250 ml of sodium hydroxide ethanol solution with a molar concentration of 2 mol / L, and add in 60 minutes to make the pH of the solution 6.5, then stir at constant temperature for 1 hour. Let it stand for 12 hours, filter, wash with absolute ethanol, water, and absolute ethanol in sequence, and dry at 62°C to obtain lanthanum p-toluate.

[0031] Preparati...

Embodiment 1

[0040]40g of lanthanum p-toluate and 160g of calcium stearate were put into a high-speed mixer and mixed for 4 minutes to obtain a mixed stabilizer.

Embodiment 2

[0042] Put 80g of lanthanum p-toluate and 120g of pentaerythritol into a high-speed mixer and mix for 3 minutes to obtain a mixed stabilizer.

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Abstract

The invention discloses a method for preparing a rare earth composite stabilizer for PVC, which includes: preparing the main stabilizer with a small molecular weight benzoic acid rare earth salt, mixing rare earth salt of p-toluic acid, polyhydric alcohol and / or stearic acid Put the salt into a high-speed mixer and mix for 2min-5min to obtain a composite stabilizer. The invention solves the problem of low initial anti-coloring ability of a single rare earth heat stabilizer, while retaining the excellent long-term stability of the rare earth heat stabilizer, and the complexes of rare earth and benzoic acid ligands have ultraviolet absorption properties, and the invention is stable The compound stabilizer also has light stability. The compound stabilizer is low-toxic and environmentally friendly, and meets the production requirements of the PVC industry today.

Description

technical field [0001] The invention relates to a PVC stabilizer, in particular to a preparation method of a rare earth composite stabilizer for PVC. Background technique [0002] Polyvinyl Chlorine (PVC) is widely used in chemical industry, materials, machinery, agriculture, daily necessities and other fields because of its superior physical properties and low cost, especially in the field of plastics, known as the five general-purpose plastics one. 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, an appropriate amount of heat stabilizer is usually added during the thermal processing of PVC. At present, widely used PVC heat stabilizers include lead salt heat stabilizers, organotin heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/098C08K5/053C08L27/06
CPCC08K5/053C08K5/098C08K2201/014C08L27/06C08L2201/08
Inventor 柳召刚李梅胡艳宏冯佳萌董昕郝伟王觅堂张晓伟冯福山
Owner INNER MONGOLIA UNIV OF SCI & TECH
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