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Production of PVC operating accessory ingredient

A technology of processing aids and PVC resins, applied in the field of PVC processing aids and its preparation, can solve the problems of uncommon application of processing aids, difficulty in controlling product molecular weight and molecular weight distribution, single variety, etc., and achieve price advantage and obvious price , the effect of excellent compatibility

Inactive Publication Date: 2007-09-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the varieties of such processing aids are relatively single.
Moreover, it is difficult to control the molecular weight and molecular weight distribution of the product simply by stress
Therefore, the application of such processing aids is not yet widespread

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Please refer to Table 1 for the formulations of 5 PVC processing aids of the present invention. First, add all raw materials into the mixing tank according to formula 1 in Table 1, and initially stir evenly. At room temperature, it was sent to a vibrating ball mill for grinding for 10 h, and the temperature was controlled at 25°C. The properties of the obtained PVC processing aid of the present invention are shown in formula 1 in Table 2.

Embodiment 2

[0026] According to formula 2 in table 1, adopt the same method of embodiment 1 to prepare PVC processing aid. The grinding time in the vibration ball mill is 15 hours, and the temperature is controlled at 30°C. The properties of the obtained PVC processing aid of the present invention are shown in formula 2 of Table 2.

Embodiment 3

[0028] According to formula 3 in table 1, adopt the same method of embodiment 1 to prepare PVC processing aid. The grinding time in the vibration ball mill is 20 hours, and the temperature is controlled at 30°C. The properties of the obtained PVC processing aid of the present invention are shown in formula 3 of Table 2.

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PUM

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Abstract

A processing agent adopts suspended polyvinyl chloride resin as raw material, peroxide or azo-compound as degrading agent, free-radical as collecting agent, octadecanoic acid as stabilizer and alcohol as dispersant. The process is carried out by putting various raw materials into container, mixing, adding them into grinder below 30degree, grinding for 10-20hrs and degrading to obtain the final product. It's cheap, non-toxic, has excellent compatibility and no environmental pollution. It can be used for PVC product.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a PVC processing aid and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is an important general-purpose polymer material, which is widely used in industry, agriculture, construction and daily life. PVC is usually prepared into various products by injection molding and extrusion processes. Due to the chemical structure of PVC itself, its decomposition temperature is very close to the plasticizing temperature, so it is easy to decompose and release HCl during processing, resulting in yellowing of the product and performance degradation. At present, there are two main ways to solve this problem: one is to add heat stabilizers to improve the thermal stability of PVC; the other is to add processing aids to reduce the plasticizing temperature of PVC. [0003] The early additives used to reduce the plasticizing temperature of PVC were mainly plastici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/25C08K5/14C08K5/09C08K5/23
Inventor 王国建杨富平刘琳许乾慰李岩
Owner TONGJI UNIV
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