The invention belongs to the field of
silicone rubber, and particularly relates to bi-component liquid
silicone rubber and a preparation method thereof. The bi-component liquid
silicone rubber comprises base rubber, a cross-linking agent, a catalytic agent and a
silane coupling agent, and is characterized in that hydroxyl-terminated polysiloxane is used as the base rubber;
tetraethyl orthosilicate is used as the cross-linking agent; organic
tin is used as the catalytic agent; amino propyl triethoxy
silane is used as the
silane coupling agent; and the other components are fillers. The bi-component liquid
silicone rubber comprises 90 to 120 parts of hydroxyl-terminated polysiloxane, 5 to 12 parts of
tetraethyl orthosilicate, 1 to 3 parts of organic
tin, 2 to 5 parts of amino propyl triethoxy silane, 20 to 40 parts of white
carbon black, 40 to 60 parts of aluminum
hydroxide and 40 to 60 parts of iron red. The preparation method comprises the steps as follows: (1) the preparation of a component A: needed raw materials are evenly mixed in a kneader and milled, stirred, vacuumized, dried, cooled, and the like, and then the component A is obtained; (2) the preparation of a component B: needed raw materials are evenly mixed and then the component B is obtained; and (3) the
concoction of a rubber compound: the rubber compound can be obtained only by mixing the component A and the component B at a
mass ratio of 100:4 to 7. The bi-component liquid
silicone rubber has the characteristics of good fluidity, high strength, good
flame retardance, high-temperature
erosion resistance, and the like.