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Technology for preparing efficient environment-friendly compound heat stabilizer for polyvinyl chloride hard products

A compound heat stabilizer and polyvinyl chloride technology, applied in the preparation of carboxylate, organic chemistry, etc., can solve the problems of poor plasticization of polyvinyl chloride rigid products, weak market competitiveness, and increased usage, avoiding stable Loss of efficiency, good self-synergistic properties, prevention of thermal oxidative decomposition

Inactive Publication Date: 2014-08-06
HUNAN JIALUN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, hard PVC products have poor plasticization, low strength, poor physical properties, and are not durable
To meet the performance requirements of lead-containing stabilizers, it is necessary to increase the amount of use, or add expensive additives to achieve it, the manufacturing cost will increase significantly, and the market competitiveness will be weak
The invention uses an innovative process to synthesize fatty acid calcium and zinc symbiosis, supplemented with new inorganic and organic auxiliary stabilizers for compounding, and prepares a new type of environmentally friendly composite heat stabilizer, which solves the problem of environmental protection composite heat stabilizers for domestic polyvinyl chloride hard products. Stabilizers generally have poor thermal stability, large amount of addition, high cost and poor physical properties of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation process of a high-efficiency and environment-friendly composite heat stabilizer for hard polyvinyl chloride products is carried out in a reaction kettle equipped with a stirrer, a thermometer and a condenser. The first step: put in 4.4 moles of stearic acid, put in 0.4 moles of calcium hydroxide at a temperature of 90-110°C for reaction, at this time, water vapor is generated; continue to raise the temperature to 120-140°C and put in 1.8 moles of calcium hydroxide Zinc, while adding 0.01 mole of water to carry out the catalytic reaction, a large amount of water vapor is generated at this time, when the water vapor becomes small, keep the temperature at 130-150°C for two hours; finish the reaction to obtain a symbiotic liquid product containing calcium stearate and zinc. In the second step, the liquid reaction product is made into a solid sheet through a molding device with a cooling device, and the material is crushed into a 200-mesh powder by a pulverize...

Embodiment 2

[0028] The preparation process of a high-efficiency and environment-friendly composite heat stabilizer for hard polyvinyl chloride products is carried out in a reaction kettle equipped with a stirrer, a thermometer and a condenser. In the first step, lauric acid is used instead of stearic acid; calcium oxide is used instead of calcium hydroxide; the operation is carried out according to the first step of Example 1; in the second step, the liquid reaction product is made into a solid sheet through a molding device with a cooling device , Grinding the material into a 200-mesh powder through a pulverizer. In the third step, 40% of fatty acid metal salt powder, 7.5% of antioxidant, 9% of lubricant, 10% of polyol, 8.5% of ketone compound and 22.5% of hydrotalcite are put into the high-speed kneader in sequence; Stir and knead, react for 5-10 minutes, and the temperature rises to 40-70°C to obtain a homogeneous powder product; the fourth step, maintain the reaction temperature at 40...

Embodiment 3

[0031]The preparation process of a high-efficiency and environment-friendly composite heat stabilizer for hard polyvinyl chloride products is carried out in a reaction kettle equipped with a stirrer, a thermometer and a condenser. In the first step, palmitic acid is used instead of stearic acid; calcium oxide is used instead of calcium hydroxide; the operation is carried out according to the first step of Example 1; in the second step, the liquid reaction product is made into a solid sheet by a molding device with a cooling device , Grinding the material into a 200-mesh powder through a pulverizer. In the third step, 42% of fatty acid metal salt powder, 4% of antioxidant, 33% of lubricant, 6.5% of polyol, 6% of ketone compound and 5% of hydrotalcite are put into the high-speed kneader in sequence by mass percentage; Stir and knead, react for 5-10 minutes, and the temperature rises to 40-70°C to obtain a homogeneous powder product; in the fourth step, maintain the reaction temp...

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Abstract

The invention relates to a technology for preparing an efficient environment-friendly compound heat stabilizer for polyvinyl chloride hard products. The technology comprises the steps of putting fatty acid into a reaction kettle with a stirrer, a thermometer and a condenser, sequentially adding calcium compounds and zinc compounds, and obtaining liquid fatty acid metal salt; preparing into solid sheets through molding equipment, then grinding, and adding an antioxidant, a lubricant, polyhydric alcohols, ketone compounds and hydrotalcite into a high speed kneading machine; and stirring at high speed and carrying out kneading reaction, then adding epoxy compounds, stirring, and preparing the final product. The technology is mainly used for machining polyvinyl chloride environment-friendly hard products, can improve the heat stability of traditional calcium-zinc compound heat stabilizers, and substitutes lead and salt heat stabilizers.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation process of a high-efficiency and environment-friendly composite heat stabilizer for polyvinyl chloride hard products, which is mainly used for processing polyvinyl chloride environment-friendly hard products. Background technique [0002] Polyvinyl chloride (PVC) is the third most commonly used plastic in the world, after polyethylene (PE) and polypropylene (PP). It has the advantages of low price, corrosion resistance, aging resistance, good transparency, excellent mechanical properties, good electrical insulation and flame retardancy, and its products are widely used in construction, chemical, electrical and other industries. Due to the unstable factors in the molecular structure of polyvinyl chloride resin, it is easy to decompose under the action of heat and oxygen and lose its use value. Therefore, heat stabilizers must be added during the processing of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/098C08K5/053C08K5/07C08K3/26C08K5/1515C07C53/126C07C51/41
Inventor 李机旻段雯玉
Owner HUNAN JIALUN BIOTECH
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