Silica gel composition and silica gel prepared from same

Abstract

The invention discloses a silica gel composition and silica gel prepared from the same. The silica gel composition is mainly used for pavement surface layers, which do not need too large bearing capacity, such as solar walkways and runways. The silica gel composition comprises the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10-40 parts of dimethyl silicone oil, 10-60 parts of transparent silica gel particles, 3 parts of a flame retardant, 2 parts of an antioxidant, 0.5 part of an ultraviolet absorbent, 7-10 parts of a cross-linking agent, 0.8-1.1 parts of a catalyst, 2-3.5 parts of an accelerant and 1 part of a water removal agent, wherein the viscosity of the hydroxyl-terminated polydimethylsiloxane ranges from 8000 mPa.s to 100000 mPa.s, the viscosity of dimethyl silicone oil is 50 to 1000 mPa.s; and the particle size of the transparent silica gel particles is 1-5 mm. The provided silica gel can enhance the light transmission, anti-skid property and elasticity of a solar road surface layer, does not yellow in long-time outdoor exposure and does not become brittle in winter.

Description

technical field [0001] The invention relates to a glue and a preparation method thereof, in particular to a silica gel composition and silica gel prepared from the composition. Background technique [0002] Solar energy is the thermal radiation energy of the sun, which is generally used to generate electricity or provide energy for water heaters in modern times; in the case of decreasing fossil fuels, solar energy has become an important part of human energy use and has been continuously developed; with the development of cities , my country's road traffic has developed rapidly, and the road area is constantly increasing, and the demand for additional road facilities such as street lights and traffic lights is also increasing, and this part of the electrical appliances increases the city's energy consumption burden. In addition, the roads of public facilities such as parking lots, squares, and parks are generally unlit, which brings a lot of inconvenience to parking and walki...

AI Technical Summary

Problems solved by technology

[0004] The existing solar pavement adhesives are usually epoxy adhesives. Epoxy adhesives are used for solar road pavements, which tend to show poor UV aging resistance. After prolonged exposure to the sun, epoxy adhesives appear Yellowing, decreased adhesive performance

In addition, the low temperature resistance of epoxy adhesive is poor, and the colloid becomes brittle at about minus 20 degrees Celsius, and the bond fails, which directly leads to damage to the solar pavement surface in cold winter

Some solar road surfaces are tempered glass, the surface is hard, the anti-skid performance is not good, and the lack of certain elasticity

[0005] The plastic runway is composed of polyurethane rubber and other materials. It has certain elasticity and color, and has certain anti-ultraviolet ability and aging resistance. Poor, not suitable for solar walkways or runways

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