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Use of soybean protein as thermostable adjuvant in PVC plastic processing

A technology of soybean protein and auxiliary agent, which is applied in the field of plastic processing, can solve the problems of toxicity and prohibition, achieve good auxiliary effect, reduce production cost, and prolong the effect of thermal stability time

Inactive Publication Date: 2008-04-02
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, heat stabilizers containing cadmium and barium are also banned due to their toxicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, rigid PVC

[0015] Mix according to the formula:

[0016] parts by mass

[0017] The results show that adding soybean protein can extend the thermal stability time of PVC by about one time, and the PVC containing calcium stearate, zinc stearate and soybean protein mixed stabilization system has a longer stable time, and soybean protein has a greater effect on stearic acid. Calcium and zinc stearate stabilizers have an assisting effect and can prolong the thermal stability time of PVC. Since soybean protein is added to the stearic acid Ca / Zn stabilizer, it can have a synergistic stabilizing effect on the stearic acid Ca / Zn stabilizer, indicating that soybean protein can be used as an auxiliary agent for heat stabilizers, which can play a role in the thermal stability of PVC. to the auxiliary role. Different formulations have different dynamic thermal stability times. As the amount of soybean protein added increased, its stability time also incr...

Embodiment 2

[0018] Embodiment 2, soft PVC

[0019] Mix according to the formula:

[0020] parts by mass

[0021] The results showed that the stability time of soft PVC increased with the increase of soybean protein content. Soy protein plays an auxiliary stabilizing effect on PVC, and plays a synergistic stabilizing effect on Ca / Zn stabilizers, so soybean protein is used as an auxiliary stabilizer in PVC formulations. With the increase of soybean protein content, its rheological stability time is also greatly improved. During the heating process of PVC, PVC releases hydrogen chloride to a certain extent, forming a carbon chain with a double bond structure. The double bond carbon chain is unstable, and continues to react under heat to form a long chain structure, which leads to an increase in the viscosity of the PVC sample. In the rheological experiment, the torque becomes larger. Due to the assisting effect of soybean protein on the metal composite stabilizer, with the incre...

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Abstract

The invention discloses the application of soybean protein in PVC preparation process as heat stabilizing assistant, belonging to plastic preparing field. Adding a certain amount of soybean protein in PVC preparation process to improve stabilizing property for PVC. The soybean protein can cooperate with calcium stearate and zinc stearate, and obviously prolongs thermal stabilization time, which improves mechanic property for PVC; it is nontoxic and can reduce production cost.

Description

technical field [0001] The application of soybean protein as a heat-stabilizing auxiliary agent in PVC plastic processing belongs to the technical field of plastic processing. Since cadmium and lead heat stabilizers are toxic and barium heat stabilizers may be potentially harmful, efforts to detoxify PVC heat stabilizers are mainly focused on organic tin and calcium-zinc composite heat stabilizers, and considerable progress has been made. However, due to the high price of these stabilizers, it is difficult to promote them on a large scale in actual production. The present invention uses soybean protein added to conventional heat stabilizers as a thermal stability auxiliary agent to improve the thermal stability of PVC, thereby improving the stability of PVC plastics. Excellent processing thermal stability, realize the non-toxicity of PVC heat stabilizer, and reduce production cost at the same time. Background technique [0002] Polyvinyl chloride (PVC) is one of the top fiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K5/524C08L89/00C08K5/12
Inventor 倪忠斌陈明清刘晓亚杨伟杨成王玮
Owner JIANGNAN UNIV
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