Low-viscosity bi-component addition type silica gel and preparation method thereof

The invention provides low-viscosity bi-component addition type silica gel which is formed by mixing a component A and a component B according to the weight ratio of 1: 1, and the component A comprises vinyl silicone oil, single-ended vinyl silicone oil, poss modified vinyl silicone oil, branched chain vinyl silicone oil, organic silicon color paste and a Karst catalyst; the component B is prepared from vinyl silicone oil, single-ended vinyl silicone oil, poss modified vinyl silicone oil, branched chain vinyl silicone oil, low-hydrogen-content silicone oil, hydrogen-terminated silicone oil and an inhibitor. The invention further provides a preparation method of the low-viscosity bi-component addition type silica gel. The bi-component addition type silica gel has the characteristics of low viscosity, good permeability, cold and hot impact resistance, stable penetration, good self-healing property and the like, and can be used for potting protection of various electronic components, PCBs (Printed Circuit Board)