TPV (Thermoplastic Vulcanizate) elastomeric material with improved electrical property

Abstract

The invention discloses a TPV (Thermoplastic Vulcanizate) elastomeric material with improved electrical property, comprising the following components in percentage by weight: 15%-60% of polypropylene, 20%-60% ethylene propylene terpolymer rubber, 0.5%-10% of high-molecular compatibilizers, 0.1%-40% of fillers, 1%-60% of rubber extending oil, 0.5%-10% of modifiers, 0.5%-10% of cross-linking agents, 0.1%-10% of cross-linking auxiliary agents, 0.01%-2% of antioxidants and 0.01%-10% of processing auxiliary agents. The invention enables the carbon nanotubes to be gathered on continuous PP (PropenePolymer) phases to form a continuous conductive network structure by adopting the carbon nanotubes as the modifiers and utilizing a principle that the special phase-stage structure of TPV and the high-molecular compatibilizers are completely compatible with PP but incompletely compatible with cross-linking rubber, thereby obtaining ideal electrical property improving effect; surface resistance isreduced to 106 when an addition amount is 2 percent, and the surface resistance is reduced to 102 when the addition amount is 5 percent, therefore the effect is far higher than that the effect of thecommon conductive carbon black; and in addition, the invention keeps good processing flow property, extends the application of the TPV in the field of antistatic materials and conductive materials and has extensive application prospect.

Description

technical field [0001] The invention relates to a TPV elastomer material. Background technique [0002] TPV is the abbreviation of Thermoplastic Vulcanization. The Chinese name is thermoplastic dynamic vulcanized elastomer or thermoplastic dynamic vulcanized rubber. It is an elastomer material composed of highly vulcanized rubber particles dispersed in a continuous plastic phase. TPV has physical properties and functional characteristics similar to thermosetting rubber at room temperature, and has the characteristics of thermoplastic melt flow and repeated processing at high temperature. It has the advantages of convenient molding and processing, recyclable materials, and excellent comprehensive performance. It has been widely used It is used in the fields of automobile industry, building materials, electronic appliances, medical and health care and consumer goods. [0003] With the continuous expansion of TPV application fields, the requirements for its performance are eas...

AI Technical Summary

Problems solved by technology

Tang Zhuo and others from Shanghai Rizhisheng used 4-8% conductive carbon black with high structure, and added polyethylene wax as a dispersant at the same time, and the surface resistivity of the material was reduced to 10%. 2 , but the invention did not conduct research on the antistatic effect of lower additions (such as less than 2%)

In addition, due to the poor compatibility between polyethylene wax and polypropylene, it is easy to precipitate when the amount added is too high, which may cause some unexpected troubles to the subsequent use of the product

Both practice and theory have shown that because carbon black has a greater reinforcing effect on rubber, when carbon black is filled at a higher level, it will cause negative effects such as a decrease in the processing flow properties of the material and a decrease in elongation at break.