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Preparation of environment friendly calcium-zinc composite heat stabilizer and its application in PVC (polrvinyl chloride)

A heat stabilizer and calcium-zinc composite technology, applied in the field of material science application technology development, can solve problems such as human health hazards, achieve the effects of preventing thermal decomposition, broad application prospects, and strengthening absorption

Inactive Publication Date: 2012-08-01
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, in recent years, with the improvement of environmental protection awareness in various countries around the world, plastic products such as medicine and food packaging, daily necessities, toys, etc. have put forward higher purity and hygiene requirements for plasticizers such as DOP, and DOP has certain toxicity. At present, most domestic PVC cling film manufacturers use DOP as a plasticizer. The cling film produced in this way is especially used on meat products with high fat content, or when it is used to wrap food and heat it in a microwave oven. There will be more opportunities for its plasticizer to migrate into the packaged food, causing potential harm to human health

Method used

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  • Preparation of environment friendly calcium-zinc composite heat stabilizer and its application in PVC (polrvinyl chloride)
  • Preparation of environment friendly calcium-zinc composite heat stabilizer and its application in PVC (polrvinyl chloride)
  • Preparation of environment friendly calcium-zinc composite heat stabilizer and its application in PVC (polrvinyl chloride)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of epoxy calcium oleate (zinc) is as follows: in the 250ml there-necked flask that is equipped with stirrer, thermometer, constant pressure funnel, add 20g oleic acid, certain quality formic acid (88%), stirring speed is controlled at 180r / Min, heat the water bath to 60°C, add hydrogen peroxide dropwise while reacting, the speed is controlled at 5-8d / min, keep dropping within 1 hour, then react at constant temperature for 4h, let the reaction product stand and separate, and take the upper layer of oily product. Dissolve 15g NaOH in 450ml water, heat to 90°C, then slowly add the refined epoxy oleic acid product, heat and stir, adjust the pH to about 8-9, stir and react at 90°C for 1 hour to obtain epoxy oil Sodium acid. 18g CaCl 2 (or 27.5g ZnCl 2 ) was dissolved in 100g of water, slowly added to epoxy sodium oleate solution, adjusted to a pH of about 9, stirred and reacted for 1 hour at 90°C to obtain epoxy calcium oleate (zinc).

Embodiment 2

[0021] Compounding of epoxy calcium zinc oleate compound stabilizer and a certain amount of epoxy soybean oil as plasticizer

[0022] Add 40 parts of epoxy soybean oil and 4g of epoxy zinc oleate to 100 parts of PVC, and mix at high speed for 5 minutes.

Embodiment 3

[0024] Compounding of epoxy calcium zinc oleate compound stabilizer and a certain amount of epoxy soybean oil as plasticizer

[0025] Add 40g epoxy soybean oil, 3g epoxy zinc oleate, 1g epoxy calcium oleate to 100g PVC, mix at high speed for 5min.

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Abstract

The invention relates to preparation of an environment friendly calcium-zinc composite heat stabilizer and its application in PVC (polrvinyl chloride). The composite stabilizer is obtained by compounding of epoxy calcium oleate and epoxy zinc oleate in certain proportion. Specifically, the epoxy calcium oleate and epoxy zinc oleate take oleic acid, formic acid, and hydrogen peroxide as the raw materials, which are first synthesized into epoxy oleate. Then through double decomposition reaction, the corresponding epoxy calcium oleate and epoxy zinc oleate can be synthesized. The epoxy calcium oleate and epoxy zinc oleate compounded heat stabilizer can coordinate with active chlorine on PVC to effectively prevent HCl (hydrogen chloride) desorption reaction, and can also adsorb and neutralize HCl to eliminate catalytic reaction on PVC degradation. The calcium-zinc composite heat stabilizer of the invention overcomes the shortcomings of toxicity, expensiveness, short heat stable time and the like in traditional heat stabilizers. Epoxy calcium oleate and epoxy zinc oleate are compounded for the first time, and a certain amount of epoxy soybean oil is taken as a plasticizer. Congo red tests and heat aging tests show that the heat stabilizer has good stabilizing effect and low cost, so that the calcium-zinc composite heat stabilizer of the invention has a good application prospect in the field of PVC processing.

Description

technical field [0001] The invention belongs to the field of material science application technology development, and relates to the preparation of an environment-friendly calcium-zinc composite heat stabilizer and its related application in PVC. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose plastics. It has the advantages of good chemical corrosion resistance, electrical insulation and low cost. It is widely used in various fields in industry, agriculture, electronics and people's daily life. . However, PVC has the disadvantages of poor thermal stability and serious degradation at normal processing temperatures, which will lead to problems such as a decline in the physical and mechanical properties of PVC materials and a gradual deepening of the color. Therefore, appropriate heat stabilizers must be added during PVC processing to inhibit its degradation. Heat stabilizers can inhibit the degradation of PVC by replacing unstable c...

Claims

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Application Information

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IPC IPC(8): C08K5/1515C08L27/06
Inventor 陈明清阮晓凯倪忠斌东为富夏鹏蒋利华
Owner JIANGNAN UNIV
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