Preparation of calcium zinc composite stabilizer for processing plastic

A compound stabilizer and stabilizer technology, applied in the field of plastic additives, can solve the problems of high cost and inconvenient use, and achieve the effect of low cost, high thermal efficiency and no dust flying

Inactive Publication Date: 2009-07-22
JINGJIANG XUGUANG PLASTIC
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Relatively high cost, the selling price is about 20-50% higher than that of general traditional products;
[0005] 3. Generally in powder form, inconvenient to use

Method used

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  • Preparation of calcium zinc composite stabilizer for processing plastic

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specific Embodiment approach

[0024] figure 1 Be the flow chart of reaction technique of the present invention, below will refer to figure 1 The preparation method of the present invention for producing the calcium-zinc composite stabilizer for PVC plastic processing is described in detail.

[0025] Synthetic calcium-zinc composite stabilizer: weigh salicylic acid 138kg, calcium oxide powder 32kg (particle size 200 mesh) and zinc oxide powder 8kg (particle size 200 mesh) and disperse in distilled water, weigh phase transfer catalyst diethylene glycol (industrial grade) 2kg, the reaction temperature is 80-90°C, the reaction time is 4.5-5h, and the organic acid calcium-zinc complex is formed in one step.

[0026] Coating and dehydration: When the organic acid calcium-zinc complex synthesized above is heated to 70-80°C, add epoxidized soybean oil and paraffin, and stir for 1 hour until the material and water are separated (the layers are clear).

[0027] Devolatilization and drying: put the coated and dehyd...

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Abstract

The invention discloses a method for preparing calcium zinc compound stabilizer used for the processing of PVC plastic; the invention is characterized by comprising: (1) organic acid, calcium oxide, and zinc oxide powder are dispersed in a water phase, and then under the function of a phase transfer catalyst, an organic acid calcium zinc compound is generated by reaction; (2) the compound which is obtained in step (1) is heated and added with an oil and grease substance, and then stirred until the material is completely separated from the water phase; and (3) the product which is obtained by separation is placed in a two-roll kneading machine, later heated to 130 DEG C, and then stirred and gradually added with antioxidant, stabilizing additives, and organic stabilizer; after tabletting and forming, a finished product is obtained. The invention is finished by one step, has short flow process, and does not produce waste; the formula of the method is optimized, the obtained composite calcium zinc stabilizer has high thermal efficiency, and the stabilizing time is improved by 50-100% compared with the products sold in the market; and the product takes the shape of a tablet or small particle, and has the advantages of no dust pollution, low beginning melting temperature, and wide adaptability.

Description

technical field [0001] The present invention relates to plastic additives. Background technique [0002] With the rapid development of social civilization, some products and technologies are no longer suitable, such as heat stabilizers for PVC plastic processing, and original heavy metal products, such as salts containing cadmium, lead, barium, and tin, are likely to cause danger to the human environment , countries such as Europe and the United States have issued some relevant regulations to restrict or prohibit the manufacture and use of such products. Subsequently, some low-toxic and non-toxic products appeared. Commercially available non-toxic and low-toxic calcium-zinc PVC plastic stabilizers have many deficiencies: [0003] 1. The thermal stabilization efficiency is not high, and the thermal stabilization time is short. Congo red test paper method (CB8815-2002), the thermal stability time at 200°C is generally 25-35 minutes; [0004] 2. Relatively high cost, the se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/06C08K9/10
Inventor 芮立
Owner JINGJIANG XUGUANG PLASTIC
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