The invention discloses
silicone rubber for a
dirty environment, a preparation method, a product and application. The preparation method comprises the following steps: (1) plastifying a part of methyl vinyl
silicone rubber
raw rubber to obtain plastified
raw rubber; (2) carrying out premixing and heat treatment on a part of raw methyl vinyl
silicone rubber, a part of or all the internal
lubricant, a part of the reinforcing filler and a part of the structured control agent to form a pre-compounded rubber master batch in which the
lubricant is uniformly dispersed; (3) sequentially adding the plasticated
raw rubber, the pre-compounded rubber master batch, the residual reinforcing filler, the
antibacterial agent, the heat stabilizer and / or the
antioxidant, the
vulcanization inhibitor and the cross-linking agent, and fully mixing to form a uniform
rubber material so as to prepare a uniformly mixed
rubber material; (4) carrying out
compression molding on the uniformly mixed
rubber material, and then carrying out first-stage
vulcanization reaction; and (5) carrying out second-stage
vulcanization reaction on the product subjected to the first-stage vulcanization. The prepared
silicone rubber can be used for preparing products such as O-shaped rings, sealing strips,
shower head hoses or kitchen utensil handles.