Essential antistatic thermoplastic polyurethane elastomer and preparation method thereof

Abstract

The invention belongs to the technical field of polyurethane elastomers, and in particular relates to an essential antistatic thermoplastic polyurethane elastomer and a preparation method thereof. Theessential antistatic thermoplastic polyurethane elastomer is prepared from the following raw materials (by weight): 29.5-65.0% of polymer polyol, 27.0-54.0% of isocyanate, 7.5-18.5% of a chain extender, 0.2-0.3% of an antioxidant and 0.01-0.03% of a catalyst. The essential antistatic thermoplastic polyurethane elastomer of the invention has good antistatic property, requires no addition of an antistatic agent, can be used for color matching, can be used to manufacture products with various colors or transparent products, and has low-temperature elasticity. Through prepolymerization by twin screw and then through one-step curing, the essential antistatic thermoplastic polyurethane elastomer is obtained. The preparation method is simple and efficient.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomers, and in particular relates to an intrinsically antistatic thermoplastic polyurethane elastomer and a preparation method thereof. Background technique [0002] Polyurethane elastomers have been widely used due to their good processing properties and wide hardness range. However, with the rapid development of industry, the performance requirements of polyurethane elastomers are getting higher and higher. In actual production and use, polyurethane elastomer materials have a relatively high surface resistivity ρs (about 10 11 ~10 14 Ω) and volume resistivity ρv (about 10 13 ~10 15 Ω·m) is very large and is an insulating material. [0003] Due to the conductive inertness of polymers, general polymer materials cannot be antistatic. And this feature has also led to the limitation of the application of TPU in some special occasions. At present, the method of improving the antistatic...

AI Technical Summary

Problems solved by technology

However, these fillers are difficult to disperse evenly in polyurethane elastomer materials, resulting in a decrease in antistatic performance, or a large amount of antistatic fillers need to be added to meet the conductive properties

Graphene and carbon nanotubes are widely used, but this conductive material still has agglomeration during production and processing, and graphene and carbon nanotubes are expensive, which severely limits the popularity and use of materials

Moreover, this kind of conductive filler affects the appearance of the product, and this kind of antistatic polyurethane elastomer seriously restricts the demand for various colors of conductive materials.

A large amount of antistatic fillers will seriously affect the strength and hardness of the material

[0004] Other antistatic agents generally have the characteristics of surfactants, with both polar groups and non-polar groups in the structure. The antistatic effect of this type of antistatic agent is related to the use environment. Good antistatic effect, poor antistatic effect in dry environment

It has high requirements on the use environment, which seriously affects the use effect of antistatic polyurethane elastomers

[0005] In summary, the existing antistatic thermal polyurethane elasticity has disadvantages such as unsustainable antistatic ability, complicated processing technology, performance loss after adding antistatic materials, and inability to make transparent or other colored products.

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