Acrylic ester rubber and preparation method thereof

Abstract

The invention provides acrylic ester rubber and a preparation method thereof. The acrylic ester rubber is characterized by comprising the following components by weight: 70-90 portions of tri-acrylate rubber AR840, 10-30 portions of butyronitrile rubber NBR, 55-75 portions of fast extruding carbon black N550, 1-2 portions of anti-aging agent RD, 1-2 portions of anti-aging agent MB, 0.5-1 portion of anti-scorching agent CTP, 3-5 portions of dioctyl phthalate DOP, 1-2 portions of dispersant rhine powder-42, 0.3-0.5 portion of common sulphur, 0.2-0.4 portion of tetramethyl thiuram disulfide TMTD, 3.5-4.0 portions of sodium stearate and 0.3-0.5 portion of potassium stearate. The sticking phenomenon is reduced and the elasticity, extensile intensity and low temperature resistance of the acrylic ester rubber are improved.

Description

technical field [0001] The invention belongs to the technical field of rubber material production, in particular to an acrylic rubber and a preparation method thereof. Background technique [0002] Acrylate rubber (ACM) is an elastomer made of specific acrylate as the basic raw material, and vulcanized monomers such as chlorovinyl acetate and acrylonitrile through multi-component copolymerization. It has a saturated main bond structure, and the side chain contains polar ester groups. Therefore, acrylic rubber has good heat resistance. The long-term use temperature is 150°C, and it can be used at 200°C for a short time; it has excellent oil resistance, especially Resistance to polar oils, such as hyperbolic gear oil (containing sulfur, phosphorus, etc.); also has ozone and ultraviolet resistance properties. Based on these characteristics, automotive oil seals are mostly processed by ACM. [0003] In recent years, with the rapid development of the automobile industry and mac...

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Problems solved by technology

[0003] In recent years, with the rapid development of the automobile industry and machinery manufacturing industry, the application of ACM has been paid more and more attention. However, it is also found that there is serious sticking to the roll during processing, the vulcanization speed is slow, and it requires high temperature and long-term secondary vulcanization. There are also defects such as poor mechanical properties and poor elasticity.