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Environmental-friendly high-efficiency composite heat stabilizer for tribasic zinc PVC (polyvinyl chloride) and preparation method of environmental-friendly high-efficiency composite heat stabilizer

A technology of composite heat stabilizer and auxiliary heat stabilizer, applied in the preparation of alcohol metal, organic chemistry, etc., can solve the limitation of the popularization and application of non-toxic zinc-based heat stabilizer, high cost, unsatisfactory heat stabilization effect of heat stabilizer, etc. problem, to achieve good initial colorability, improved processing performance, and good stabilization effect.

Inactive Publication Date: 2012-11-21
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

[0007] However, there are a variety of preparation methods for zinc-based heat stabilizers, but the heat stabilizers prepared either have unsatisfactory thermal stability effects, or have not completely changed the "zinc burning" phenomenon, or the cost is high, which greatly limits non-toxicity. Popularization and Application of Zinc-based Heat Stabilizer

Method used

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  • Environmental-friendly high-efficiency composite heat stabilizer for tribasic zinc PVC (polyvinyl chloride) and preparation method of environmental-friendly high-efficiency composite heat stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh pentaerythritol and zinc oxide according to the mass ratio of 7:3, pulverize the two fully and mix them, heat to 180°C, stir while heating, react for 4 hours, take out the materials and cool them, and obtain zinc trisalt after pulverization.

[0021] First add 34 parts by mass of zinc trisalt and 28 parts by mass of calcium stearate into the reaction kettle and mix them well, take the mixed material, put it into a kneader and knead it at 110°C for 20 minutes, then add 30 parts by mass of lubricant hard Fatty acid and 8 parts by mass of auxiliary heat stabilizer stearoylbenzoylmethane were kneaded and stirred for 25 minutes, discharged into tablets, sieved and packaged to obtain the final product.

Embodiment 2

[0023] Weigh pentaerythritol and zinc oxide according to the mass ratio of 6:3, pulverize and mix them fully, heat to 150°C, stir while heating, and react for 5.5 hours, take out the materials and cool them, and after pulverization, zinc trisalt is obtained.

[0024] First add 40 parts by mass of zinc trisalt and 30 parts by mass of calcium stearate into the reaction kettle and mix well, take the mixed material, put it into a kneader and knead it at 120°C for 25 minutes, then add 20 parts by mass of lubricant polymer to the kneader Ethylene wax and 10 parts by mass of auxiliary heat stabilizer dibenzoylmethane were kneaded and stirred for 30 minutes, discharged into tablets, sieved and packaged to obtain the final product.

Embodiment 3

[0026] Weigh pentaerythritol and zinc oxide according to the mass ratio of 8:3, pulverize and mix them thoroughly, heat to 160°C, stir while heating, and react for 5 hours, take out the materials and cool them, and obtain zinc trisalt after pulverization.

[0027] First add 45 parts by mass of zinc trisalt and 25 parts by mass of calcium stearate into the reaction kettle and mix thoroughly, take the mixed material, put it into a kneader and knead it at 120°C for 18 minutes, then add 25 parts by mass of lubricant polymer to the kneader Ethylene wax and 5 parts by mass of auxiliary heat stabilizer dibenzoylmethane were kneaded and stirred for 32 minutes, discharged into tablets, sieved and packaged to obtain the final product.

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Abstract

The invention belongs to the field of a heat stabilizer for PVC (polyvinyl chloride) and relates to an environmental-friendly high-efficiency composite heat stabilizer for tribasic zinc PVC (polyvinyl chloride) and a preparation method of the environmental-friendly high-efficiency composite heat stabilizer. The environmental-friendly high-efficiency composite heat stabilizer for the tribasic zincPVC (polyvinyl chloride) is prepared by performing a reaction of tribasic zinc, calcium stearate, a lubricant and an auxiliary heat stabilizer, wherein the tribasic zinc is prepared by mixing pentaerythritol and zinc oxide according to a weight ratio of 6-8:3 and performing a reaction for 4 to 6 hours at a temperature of 140 to 180 DEG C. The preparation method comprises the following steps of: adding the tribasic zinc and the calcium stearate into a reaction kettle for sufficiently mixing; adding the mixed materials into a kneading machine to knead for 15 to 25 minutes at a temperature of 100 to 120 DEG C; adding a lubricating agent and the auxiliary heat stabilizer in the kneading machine to knead and stir for 25-35min; and carrying out discharging, tabletting, sieving and packaging to obtain the finished product. The prepared environmental-friendly high-efficiency composite heat stabilizer for the tribasic zinc PVC (polyvinyl chloride) has the characteristics that the environmental-friendly high-efficiency composite heat stabilizer is difficult to separate out and has good stabilizing effect; the balancing torque can be reduced; and the processing property is improved. Moreover, the environmental-friendly high-efficiency composite heat stabilizer for the tribasic zinc PVC (polyvinyl chloride) has the advantages of high efficiency and environment protection.

Description

technical field [0001] The invention belongs to the field of heat stabilizers for PVC, and in particular relates to an environment-friendly and high-efficiency composite heat stabilizer for zinc tribasic PVC and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is the second largest general-purpose plastic in output after polyethylene. It has the advantages of high strength, plasticization, corrosion resistance, good insulation, and flame retardancy. It is widely used in industrial construction, daily necessities, and agriculture. field. However, PVC has poor thermal stability and is prone to decomposition under processing temperature conditions, so a heat stabilizer must be added to make it process smoothly. Heat stabilizer is a chemical additive that can inhibit the degradation and discoloration of PVC caused by heat and light during processing and use. Commonly used heat stabilizers include lead salt stabilizers, metal soaps, organotin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L23/06C08K5/04C08K5/057C08K5/098C08K5/09C08K5/07C07C31/24C07C29/70
Inventor 唐守余李德刚
Owner 慧科高新科技股份有限公司
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