High-hardness rubber, and preparation method and application thereof

Abstract

The invention provides a high-hardness rubber, and a preparation method and an application thereof. The high-hardness rubber is mainly prepared from, by mass, 30 parts of styrene butadiene rubber, 70 parts of nitrile rubber, 5-6 parts of zinc oxide, 1-2 parts of stearic acid, 2 parts of an antioxidant, 140-145 parts of carbon black, 20-25 parts of a softener, 5-7 parts of an ointment, 2 parts of a flow agent and 1.8-2.2 parts of a promoter. The preparation method is characterized in that the high-hardness rubber is prepared through rubber mixing, vulcanization, trimming and examination. The raw material proportioning and the preparation method of the high-hardness rubber effectively improve the integral performances of the above product, so the high-hardness rubber prepared in the invention has good oil, wear and ageing resistance, and can be applied to make V-shaped rubber seal rings in order to solve the technical problem of unable simultaneous use requirement reaching of the oil resistance, the wear resistance and the ageing resistance of present high-hardness V-shaped rubber seal rings and to make the V-shaped rubber seal rings have high reliability and long service life.

Description

technical field [0001] The invention relates to the technical field of rubber products, in particular to a high-hardness rubber and its preparation method and application. Background technique [0002] V-shaped rubber sealing ring, that is, a rubber sealing ring with a cross-sectional structure similar to V-shaped, it is widely used in various fields, such as automobiles, machinery, etc. Generally, its hardness is between 60 and 80 degrees of Shore hardness, and the deformation is relatively small. Large size and low rigidity have become important factors that limit its application. [0003] At present, the materials used for V-shaped rubber sealing rings are mainly natural rubber, neoprene, and nitrile rubber. Rubber has high tensile strength, heat resistance, light resistance, aging resistance, and oil resistance are superior to natural rubber and butyl rubber, and has strong flame resistance and excellent flame retardancy. It has high chemical stability and water resista...

AI Technical Summary

Problems solved by technology

[0003] At present, the materials used for V-shaped rubber sealing rings are mainly natural rubber, neoprene, and nitrile rubber. Rubber has high tensile strength, heat resistance, light resistance, aging resistance, and oil resistance are superior to natural rubber and butyl rubber, and has strong flame resistance and excellent flame retardancy. It has high chemical stability and water resistance. It is better, but there are still defects such as poor electrical insulation performance, cold resistance, and instability when raw rubber is stored; natural rubber has good resilience, elongation, tensile strength, and tear strength, but it is oil-resistant in terms of shortcomings. The property performance is poor, basically similar to styrene-butadiene rubber; nitrile rubber has been widely used in the field of shoe material foaming materials for its excellent water resistance and oil resistance in recent years, but nitrile rubber products also have low mechanical strength, The disadvantages of poor insulation performance and slightly lower elasticity

Therefore, although the high-hardness V-shaped rubber sealing ring can meet the requirements in terms of hardness and has a good sealing effect, the rubber ring is prone to swelling, hardness reduction, and strength reduction during use, which causes the volume expansion and geometric dimension of the rubber ring to be large in the early stage. , physical properties drop and cause oil leakage, the sealing effect is reduced

Therefore, the high-hardness V-shaped rubber ring in the prior art cannot meet the requirements of oil resistance, wear resistance, and aging resistance at the same time, and its sealing reliability and service life are still improved.

Images