Wear-resistant Buna-N rubber thermoplastic elastomer composition and preparation method thereof

Abstract

The invention discloses a wear-resistant Buna-N rubber thermoplastic elastomer composition and a preparation method thereof. The wear-resistant Buna-N rubber thermoplastic elastomer composition is prepared from Buna-N rubber, modified resin, a high-hardness silicate mineral substance and conventional auxiliary agents by blending. Raw materials of the wear-resistant Buna-N rubber thermoplastic elastomer composition comprise: by mass, 100 parts of Buna-N rubber (NBR), 0 to 60 parts of polyvinyl chloride (PVC) resin, 0 to 50 parts of styrene-butadiene-styrene block copolymer (SBS), 0 to 30 partsof a plasticizer dioctyl phthalate (DOP), 5.0 parts of a calcium-zinc composite stabilizing agent, 0 to 1.0 part of zine stearate, 0 to 0.6 parts of calcium stearate, 0.6 parts of eleaostearic acid, 0 to 0.5 parts of a composite antioxidant, 0 to 10 parts of potter's clay, and 15 to 60 parts of the high-hardness silicate mineral substance. The wear-resistant Buna-N rubber thermoplastic elastomer composition has excellent elasticity of a rubber elastomer, good scratch resistance and wear resistance and low raw material prices and can be recycled. The preparation method of the wear-resistant Buna-N rubber thermoplastic elastomer composition has simple preparation processes and a low production cost, and utilizes waste and old resources.

Description

technical field [0001] The invention is a wear-resistant nitrile rubber thermoplastic elastomer composition and a preparation method thereof. It is a copolymer of conjugated dienes. In particular, it relates to a butadiene-acrylonitrile copolymer composition and a preparation method thereof. Background technique [0002] Thermoplastic elastomers, also known as thermoplastic rubbers, combine the properties of rubber with those of thermoplastics. With the rapid development of the automobile industry, the application of TPE thermoplastic elastomers has grown rapidly, and the demand is also increasing. The performance of existing products can no longer meet the demand. The thermoplastic elastomer product with high wear resistance meets the new development needs of the material market and has a relatively broad application space and market prospect. [0003] Rubber itself has good elasticity and is a good elastomer, which can improve the low temperature resistance, resilience ...

AI Technical Summary

Problems solved by technology

[0003] Rubber itself has good elasticity and is a good elastomer, which can improve the low temperature resistance, resilience and compression permanent deformation of the material. Although it has certain wear resistance, it is used in some places that require high wear resistance The industry still does not meet the requirements

At present, to improve the wear resistance of rubber materials, it is generally to choose high polymer resin with better wear resistance or add resin and filler with better wear resistance to rubber, such as adding calcium carbonate, talcum powder, and mica powder to rubber. etc. can reduce the cost of materials, adding white carbon black can improve wear resistance, but the price is expensive; but because these fillers themselves have low hardness and a large filling amount, it will affect the performance of rubber elastic body and the modification effect on wear resistance

Generally, adding calcium carbonate whiskers and barium sulfate whiskers to rubber can improve the wear resistance, but the whisker material is relatively brittle and easy to break during processing, and the wear resistance is still not high after being made into an elastomer

Existing rubber elastic body has cross-linking type, although has better abrasion resistance and elasticity, but can not be recycled; Good hardness and wear resistance but not soft