MODIFIED NANOCOMPOSITE SILICONE RUBBER SEAL RING AND PREPARATION THEREOF

摘要

Provided is a modified nanocomposite silicone rubber seal ring, comprising: raw rubber mixing rubber material and vulcanizing agent with weight ratio of 100: 0.5 to 10. The raw rubber mixing rubber material comprises the following parts by weight: 70 to 100 parts of methyl vinyl silicone rubber, 1 to 20 parts of plasticizer, 0.01 to 10 parts of modified nano additive, 10 to 50 parts of reinforcing filler and 0.5 to 5 parts of coupling agent. The modified nano additive is one of modified white graphene, modified graphene and graphene oxide. The composite silicone rubber seal ring is added with a small amount of nano-modified particles, which is helpful in increasing sealing performance and mechanical strength, while not affecting other properties. The modified nanocomposite silicone rubber seal ring effectively solves the problems that water vapor and gas permeability of the silicone seal ring is degraded and mechanical properties thereof is reduced due to the aging in the course of a long time using, thereby greatly extending the service life of the sealing material.