Montmorillonite modified silicone seal gum and preparation method thereof

Abstract

The invention relates to montmorillonite modified silicone fluid sealant and a process for preparation, the fluid sealant is composed of silicone crude rubber, metasilicate montmorillonite, organic treating agent, cross-linker, plasticizing agent, viscosity increaser and initiating agent, the process for preparation comprises cation exchange reaction between the montmorillonite and the organic treating agent, then, organic modified montmorillonite is evenly scattered in the silicone crude rubber, and then the cross-linker, the initiating agent and other additives are added, solidified, and shaped. The fluid sealant has good binding power, excellent weather fastness, perfect ultra-violet resisting anti-aging performance and water-resistant performance to bridges, tunnels and road projects and concrete elements of buildings, can keep excellent flexibility and stretch rate in environments of sun, rain, snow, extreme high or extreme low-temperature, has non pollution to environment and road surface, and can be widely applied to seal concrete dilatation joints in the bridges, the tunnels, the road projects, airport runway, construction works and the like, to repair cracking concrete structures, and to treat metal surface with anti-corrosion.

Description

technical field [0001] The invention relates to the field of silicon sealant applied to concrete expansion joints, in particular to a montmorillonite modified silicone sealant and a preparation method thereof. Background technique [0002] With the development of urban construction, urban roads, bridges, houses and buildings and related concrete projects are also increasing. The problem of concrete joints has attracted more and more attention from the engineering community. The durability, elasticity, and integrity of concrete joint materials Adhesion and strength also put forward higher requirements. At present, asphalt, vulcanized rubber, various resins, and polyurethane materials are mainly used as concrete joint materials in China. These materials have poor weather resistance, elasticity, overall cohesion, and strength, and are toxic and easy to cause environmental pollution. Silicone rubber has excellent high and low temperature resistance, weather resistance, aging re...

AI Technical Summary

Problems solved by technology

At present, asphalt, vulcanized rubber, various resins, and polyurethane materials are mainly used as concrete joint materials in China. These materials have poor weather resistance, elasticity, overall cohesion, and strength, and are toxic and easy to cause environmental pollution.

Silicone rubber has excellent high and low temperature resistance, weather resistance, aging resistance, high elasticity and bonding strength, etc., and it shows more than other materials in the joints of bridges, tunnels, road engineering, airport runways, construction engineering, etc. Excellent performance, but because it is mainly reinforced by fumed silica, and this silica is expensive, not easy to disperse evenly, and is easily absorbed by the human body during operation, causing great harm to human health