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Benzoic acid rare earth salt composite stabilizer for PVC and preparation method thereof

A compound stabilizer and benzoic acid technology, applied in the field of PVC stabilizers, can solve the problems of unproven light stability, lack of competitiveness, and reduce manufacturing costs, so as to achieve good long-term thermal stability and reduce usage , the effect of mild reaction conditions

Inactive Publication Date: 2019-01-15
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • Benzoic acid rare earth salt composite stabilizer for PVC and preparation method thereof
  • Benzoic acid rare earth salt composite stabilizer for PVC and preparation method thereof
  • Benzoic acid rare earth salt composite stabilizer for PVC and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] Preparation of Lanthanum Terephthalate

[0026] Put 24.9g of terephthalic acid in a beaker, add 249mL of ethanol aqueous solution with a volume ratio of 1:1 to dissolve, and make a terephthalic acid solution with a mass concentration of 0.1g / ml. Measured by lanthanum chloride: terephthalic acid=2:3 molar ratio, measure 67mL of lanthanum chloride solution with a concentration of 1.5mol / L in a beaker, place the beaker in a water bath, heat and stir To 60°C, the terephthalic acid solution was added dropwise to the above system. After the dropwise addition, 700ml of aqueous sodium hydroxide solution with a molar concentration of 1mol / L was added with a peristaltic pump, and the addition was completed in 60 minutes to make the pH of the solution = 5, and then stirred at constant temperature for 1 hour. Cool to room temperature, filter, wash, and dry at 70°C to obtain lanthanum terephthalate.

[0027] Preparation of cerium terephthalate

[0028] Put 45g of terephthalic aci...

Embodiment 1

[0032] Put 40g of lanthanum terephthalate and 160g of calcium stearate into a high-speed mixer and mix for 2 minutes to obtain a mixed stabilizer.

Embodiment 2

[0034] Put 160g of lanthanum terephthalate and 40g of glycerin into a high-speed mixer and mix for 4 minutes to obtain a mixed stabilizer.

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Abstract

The invention discloses a benzoic acid rare earth salt composite stabilizer for PVC and a preparation method thereof. The composite stabilizer is formed by compounding a main stabilizer and an auxiliary stabilizer. The main stabilizer is small-molecular-weight benzoic acid rare earth salt, and the auxiliary stabilizer comprises polyols and stearates. The composite stabilizer comprises the components in parts by weight: 1-8 parts of the small-molecular-weight benzoic acid rare earth salt, 1-4 parts of the polyols and 1-4 parts of the stearates. The problem of low initial anti-coloring ability of a single rare earth thermal stabilizer is solved, meanwhile, the excellent long-term stability of the rare earth thermal stabilizer is retained, and the complex of rare earth and a benzoic acid ligand has ultraviolet absorption performance, and the stabilizer also has light stability. The composite stabilizer has low toxicity and environmental protection, and meets the production requirements ofPVC industry at present.

Description

technical field [0001] The invention relates to a PVC stabilizer, in particular to a benzoic acid rare earth salt composite stabilizer for PVC and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose resins in the world. Its products have the advantages of easy control of hardness, high mechanical properties, corrosion resistance, good electrical insulation, high transparency, and low price. They are widely used in industry and agriculture. and other production areas. The world's annual sales rank second only to PE among thermoplastics. However, the stability of PVC is poor, and it is prone to degradation reactions under external factors such as light and heat. When heated to 110°C, HCl will be released, and the released HCl will accelerate the decomposition of PVC, seriously affecting the performance of PVC resin. The processing temperature of PVC is generally above 160°C, so a stabilizer must be added in...

Claims

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Application Information

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