A method for preparing permanent antistatic branched polyamide elastomer, elastomer prepared by the method and use thereof

Abstract

The invention discloses a method for preparing a permanent antistatic polyamide elastomer, the permanent antistatic polyamide elastomer prepared by the method and its application. The preparation method of the permanent antistatic branched polyamide elastomer is as follows: adding a polyamide hard segment polymer unit, a soft segment polymer unit containing a hygrophilic group, a molecular weight modifier, distilled water, a catalyst and a branched polyamide elastomer to an autoclave. modifying agent, then carry out salt-forming reaction, ring-opening polymerization, continuous polymerization, vacuumize, fill nitrogen to balance the pressure, add additives, cast strips, pull rods, granulate, and dry to obtain the permanent anti-aging agent. Electrostatically branched polyamide elastomer. The permanent antistatic polyamide elastomer has excellent natural appearance, high fluidity, good compatibility with engineering plastics, and can well maintain various mechanical properties of polymer materials in a wide range of high and low temperatures.

Description

technical field [0001] The invention belongs to the field of new polymer material preparation, and in particular relates to a method for preparing a permanent antistatic branched polyamide elastomer, the permanent antistatic branched polyamide elastomer prepared by the method and its application. Background technique [0002] Polyamide elastomer is a new type of thermoplastic elastomer developed and applied in recent years. It has the elasticity of rubber, the processability of plastic, good chemical properties, and high and low temperature resistance, but it has electrical insulation like most polymers. , the surface resistance is usually in the range of 10 14 -10 17 Ω, it is easy to produce static electricity problems during use, the dust affects the surface cleanliness, and the electrostatic discharge is easy to cause sparks and short circuits, which limits its promotion and use in specific fields of electronic appliances and chemical energy. Therefore, it is necessary t...

AI Technical Summary

Problems solved by technology

[0002] Polyamide elastomer is a new type of thermoplastic elastomer developed and applied in recent years. It has the elasticity of rubber, the processability of plastic, good chemical properties, and high and low temperature resistance, but it has electrical insulation like most polymers. , the surface resistance is usually in the range of 10 14 -10 17 Ω, it is easy to produce static electricity problems during use, the dust affects the surface cleanliness, and the electrostatic discharge is easy to cause sparks and short circuits, which limits its promotion and use in specific fields of electronic appliances and chemical energy. Therefore, it is necessary to develop permanent antistatic Performance Polyamide Elastomers

[0003] At present, the following methods are mainly used to improve the antistatic performance of polymers: 1) Mixing a small amount of small molecule antistatic agent in the polymer to prepare the resin, relying on the migration of small molecules to maintain the effect, but the antistatic effect cannot be maintained for a long time

2) Knead conductive fillers in polymers to make them have permanent antistatic effect, but the addition amount is large, the compatibility is not good, the processing is not easy and the mechanical properties are greatly affected, and the color appearance is too dark

3) Blending polymer-type permanent antistatic agent into the polymer, it will not migrate and wash, and the antistatic is permanent, but this method has compatibility problems when blending and adding, and the heat resistance will be lost when the amount is added. and mechanical strength

However, the composition lacks sufficient fluidity and cannot fully meet the requirements in processing

Images