Modified fluororubber sealing gasket used for engine and preparation method of modified fluororubber sealing gasket

Abstract

The invention discloses a modified fluororubber sealing gasket used for an engine. The modified fluororubber sealing gasket comprises, by weight, 50-70 parts of maleic anhydride modified fluororubber, 20-30 parts of polyether urethane rubber, 10-20 parts of polypropylene, 5-15 parts of methyl vinyl silicone rubber, 1-3 parts of titanate coupling agents TMC-TTS, 0.8-1.6 parts of dicumyl peroxide, 1-3 parts of potassium peroxodisulfate, 1-3 parts of 2-thiol group benzimidazole, 5-8 parts of magnesium hydrate, 20-30 parts of polytetrafluoroethylene fiber, 5-10 parts of carbon fiber, 5-10 parts of ceramic fiber, 5-15 parts of white carbon black, 8-17 parts of talcum powder, 1-3 parts of anti-ageing agents, 1-3 parts of triphenyl phosphate, 1-3 parts of dibutyl phthalate, 1-2 parts of stearic acid, 0.5-1.5 parts of liquid paraffin and 1-3 parts of naphthenic oil. The invention further discloses a preparation method of the modified fluororubber sealing gasket. The product has good shock absorption performance and a good mechanical property, and the preparation method is simple.

Description

technical field [0001] The invention relates to the technical field of fluororubber, in particular to a modified fluororubber sealing gasket for an engine and a preparation method thereof. Background technique [0002] Sealing gaskets are mainly used to prevent material leakage, and can be made of metal materials, plastics, fabrics, etc., but more and more rubber materials are used at present. Compared with other rubbers, fluororubber has excellent high temperature resistance, oil resistance and resistance Chemical corrosion performance is currently widely used in engine gaskets. However, with the improvement of engine performance for a long time, the wear resistance, elasticity and mechanical properties of fluorine rubber are increasingly unable to meet the needs. Contents of the invention [0003] The invention provides a modified fluorine rubber sealing gasket for an engine and a preparation method thereof. The product has high elasticity, good wear resistance, extremel...

AI Technical Summary

Problems solved by technology

[0002] Sealing gaskets are mainly used to prevent material leakage, and can be made of metal materials, plastics, fabrics, etc., but more and more rubber materials are used at present. Compared with other rubbers, fluororubber has excellent high temperature resistance, oil resistance and resistance Chemical corrosion performance is currently widely used in engine gaskets, but with the improvement of engine performance for a long time, the wear resistance, elasticity and mechanical properties of fluororubber can not meet the demand more and more