A kind of high-viscosity rubber for engine mount and its preparation method

Abstract

The invention discloses a high-viscosity rubber for engine mounting. The high-viscosity rubber for engine mounting comprises, by weight, 2-3 parts of a tackifying plasticizer and 0.5-2 parts of vulcanizing agent; 50-55 parts of natural rubber for forming a rubber matrix; 4-7 parts of ethylene-vinyl acetate rubber and 2-5 parts of microcrystalline wax which are used for forming a first tackifying component together with the tackifying plasticizer; 4-7 parts of chloroprene rubber which is used for forming a second tackifying component together with the tackifying plasticizer; and 0.5-2 parts ofa methylene donor, 1-2 parts of non-self curing phenolic resin and 4-7 parts white carbon which are used for forming a third tackifying component. The high-viscosity rubber has a high bonding strengthwith metals, and can be used for mounting heatproof engines of high-grade cars. The invention also discloses a preparation method of the high-viscosity rubber for engine mounting.

Description

technical field [0001] The invention relates to a high-viscosity rubber used for engine suspension and a preparation method. Background technique [0002] At present, most of the rubber in the engine mount is combined with the skeleton through the form of rubber-adhesive-metal or plastic skeleton. [0003] The rubber material has good damping and shock absorption properties. After the rubber is bonded and vulcanized by the adhesive and the metal frame of the engine mount, it can be Reduce engine vibration and reduce engine noise, so this type of product has excellent NVH performance. [0004] While the rubber engine mount has the functions of cushioning, protection, and noise reduction, it must also resist the high temperature of the engine up to 90°C. The rubber as a polymer and the adhesive that makes the rubber and the metal skeleton bond , there are three major disadvantages in this case: [0005] First. The rubber bonding strength is poor. Polymer rubber and adhesiv...

AI Technical Summary

Problems solved by technology

[0005] First. Poor rubber bonding strength

Polymer rubber and adhesives themselves have extremely poor heat resistance, and are prone to aging under long-term high-temperature conditions, causing the rubber to detach from the adhesive or the adhesive from the bonded metal skeleton;

[0006] 2. Rubber-adhesive bond strength is poor

The existing adhesive rubber, when bonding with most of the adhesives on the market, did not select relevant components to improve the bond strength of the rubber-adhesive according to the characteristics of the adhesive

[0007] 3. Adhesive-skeleton bond strength is poor

The current traditional adhesive rubber has a single component, which only has limited enhancement of adhesion, and does not start from the rubber formula to assist in improving the adhesive-skeleton bonding, and the long-term use effect is not good.

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