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High-efficiency zinc-based composite heat stabilizer for PVC and preparation method thereof

A technology of compound heat stabilizer and auxiliary heat stabilizer, applied in the chemical industry, can solve the problems of complex preparation process of polymer zinc soap, increase the cost of compound stabilizer, reduce the actual use effect, etc., and achieve excellent long-term thermal stability performance. Anti-initial coloring, good stabilization effect

Active Publication Date: 2016-01-27
慧科高新科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of polymer zinc soap is relatively complicated, thus increasing the cost of the entire composite stabilizer
[0005] Invention patent CN102731934A discloses a method of using liquid calcium zinc to prepare PVC heat stabilizer. The composite heat stabilizer can improve the thermal stability and color resistance of polyvinyl chloride, and the liquid calcium zinc composite heat stabilizer overcomes the traditional thermal stability. It has the disadvantages of poisonous, heavy metal pollution, poor thermal stability, etc. It has the advantages of non-toxic, environmental protection, no heavy metals, and low price. It is an efficient composite thermal stabilizer and has a good application prospect.
However, pentaerythritol has a relatively high melting point (over 200°C), so it has poor compatibility with PVC and is easy to precipitate, which reduces its actual use effect

Method used

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  • High-efficiency zinc-based composite heat stabilizer for PVC and preparation method thereof
  • High-efficiency zinc-based composite heat stabilizer for PVC and preparation method thereof
  • High-efficiency zinc-based composite heat stabilizer for PVC and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of dipentaerythritol glutaric acid: Weigh 20kg glutaric acid and 40kg pentaerythritol, pulverize and mix the two fully with a pulverizer, add to the reaction kettle, add 10L cyclohexane as water-carrying agent and 3kg concentrated sulfuric acid, oil bath Heat to 150°C, stir while heating, and after 4 hours of reaction, vacuumize to remove excess water-carrying agent, and cool to obtain dipentaerythritol glutarate.

[0024] PVC is prepared with a new type of high-efficiency zinc-based composite heat stabilizer: first add 50kg of zinc stearate, 20kg of dipentaerythritol glutarate and 10kg of 4A molecular sieve into the reactor and mix them thoroughly, then add them to the kneader and knead at 120 ° C for 25 minutes, and then add Add 10kg polyethylene wax and 10kg monoglyceride as lubricants, 10kg epoxidized soybean oil, 5kg dibenzoylmethane, 3kg antioxidant 1010 and 3kg antioxidant 168 into the kneader, knead and stir for 30min, discharge and sieve , packaging...

Embodiment 2

[0026] Preparation of dipentaerythritol glutarate: Weigh 30kg glutaric acid and 50kg pentaerythritol, pulverize and mix the two with a pulverizer, add to the reaction kettle, add 15L of cyclohexane as water-carrying agent and 4kg of concentrated sulfuric acid, oil bath Heat to 130°C, stir while heating, and after reacting for 6 hours, vacuumize to remove excess water-carrying agent, and cool to obtain dipentaerythritol glutarate.

[0027] PVC is prepared with a new type of high-efficiency zinc-based composite heat stabilizer: first add 45kg of zinc stearate, 10kg of dipentaerythritol glutarate and 18kg of 4A molecular sieve into the reaction kettle and mix them thoroughly, then add them to the kneader and knead at 100°C for 20 minutes, and then add Add 13kg polyethylene wax and 12kg monoglyceride as lubricant, 10kg epoxidized soybean oil, 10kg dibenzoylmethane, 3.5kg antioxidant 1010 and 3.5kg antioxidant 168 in the kneader, knead and stir for 20min, discharge Sieve and pack t...

Embodiment 3

[0029] Preparation of dipentaerythritol glutarate: Weigh 25kg glutaric acid and 60kg pentaerythritol, pulverize and mix them fully with a pulverizer, add them to the reaction kettle, add 13L cyclohexane as water-carrying agent and 5kg concentrated sulfuric acid, and put them in an oil bath Heat to 140°C, stir while heating, and after 5 hours of reaction, vacuumize to remove excess water-carrying agent, and cool to obtain dipentaerythritol glutarate.

[0030] PVC is prepared with a new type of high-efficiency zinc-based composite heat stabilizer: first add 40kg of zinc stearate, 15kg of dipentaerythritol glutarate and 20kg of 4A molecular sieve into the reaction kettle and mix them thoroughly, then add them to the kneader and knead at 110°C for 30 minutes, and then add Add 15kg polyethylene wax and 15kg monoglyceride as lubricant, 10kg epoxidized soybean oil, 8kg stearyl benzoylmethane, 4kg antioxidant 1010 and 4kg antioxidant 168 in the kneader, knead and stir for 25min, discha...

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Abstract

The invention belongs to the field of chemical technology, and particularly relates to an efficient zinc-based composite heat stabilizer for PVC (polyvinyl chloride) and a preparation method thereof. The efficient zinc-based composite heat stabilizer is prepared from the following raw materials in parts by weight: 40-50 parts of zinc stearate, 10-20 parts of dipentaerythritol glutarate, 10-20 parts of 4A molecular sieve, 20-30 parts of lubricant, 15-20 parts of auxiliary heat stabilizer and 6-8 parts of antioxidant. The preparation method comprises the steps of firstly adding zinc stearate, dipentaerythritol glutarate and 4A molecular sieve into a reaction kettle, and mixing sufficiently; adding the mixed material into a kneading machine, and kneading at 100-120 DEG C for 20-30 minutes; then adding the lubricant, auxiliary heat stabilizer and antioxidant into the kneading machine; kneading and stirring for 20-30 minutes; discharging, sieving and packaging to obtain the efficient zinc-based composite heat stabilizer. The composite heat stabilizer prepared by the method provided by the invention has the characteristics of rare precipitation and good stabilizing effect. The preparation method provided by the invention is pollution-free, scientific and reasonable and simple and easy to implement while the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a high-efficiency zinc-based composite heat stabilizer for PVC and a preparation method thereof. Background technique [0002] Polyvinyl Chloride (PVC for short) is a synthetic resin material, and its output and consumption are the first among the five general-purpose resins in my country. Because PVC has the characteristics of flame retardancy, wear resistance, chemical corrosion resistance, comprehensive mechanical properties, and electrical insulation, it has developed rapidly in my country in recent years. Since 2000, China's PVC industry has entered a period of rapid development. By 2020, it is estimated that China's PVC resin output will reach 28 million tons, and consumption will exceed 22 million tons. Although the consumption of PVC is huge, its service life is very short, causing a lot of waste. Scientists have been trying various methods to prol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K13/02C08K5/098C08K5/11C08K3/34C08K5/1515C08K5/134
Inventor 李德刚唐守余
Owner 慧科高新科技股份有限公司