A waterproof elastic sealing material

Abstract

The application provides a waterproof elastic sealing material, comprising: liquid polysulfide rubber, the number-average molecular weight of which is 1000-7500, and a cross-linking degree of 0-2; the cross-linking agent is active manganese dioxide; liquid polysulfide rubber and cross-linked The weight ratio of the agent is 6-14:1; the liquid polysulfide rubber accounts for 25-60% of the total weight of the waterproof elastic sealing material, and the cross-linking agent accounts for 2-5% of the total weight of the waterproof elastic sealing material. The caulking waterproof sealing material described in this paper has a small density after curing, which improves the economy; low water vapor transmission rate and good waterproof effect; high activity retention rate after storage; under long-term water immersion conditions, the mechanical properties of bonding with concrete High performance retention rate; suitable for improving the existing caulking and sealing elastic materials due to the large attenuation of bonding strength under long-term water immersion conditions, which leads to frequent maintenance of projects, so as to improve the quality of waterproof projects, including tunnels, bridges, roads, sewage treatment Pools, channels, etc.

Description

technical field [0001] The invention relates to an elastic sealing material, in particular to a caulking waterproof elastic sealing material with high-efficiency water resistance. Background technique [0002] The caulking waterproof elastic sealing material is an important component of the engineering waterproof sealing system, and the quality of the caulking elastic waterproof sealing material directly affects the waterproof effect of the project. The joint structure of waterproof engineering involves porous materials such as concrete or various metal materials. Due to different designs or types of buildings, the working conditions of the caulking are different. Choose a waterproof elastic sealing material with a high performance retention rate for the caulking part Excellent sealing and waterproof bonding, which can not only offset the expansion allowance of concrete after thermal expansion and contraction, but also ensure the long-term adhesion between the caulking seali...

AI Technical Summary

Problems solved by technology

It is understood that in the current waterproof building engineering, because the joints are made of porous materials such as concrete under the condition of water, they cannot prevent moisture from penetrating to the bonding surface of the caulking sealing material, which will lead to the caulking under long-term water immersion conditions. The retention rate of the bonding performance between the seam sealing waterproof material and the base material is poor, and the frequent maintenance of the caulking waterproof sealing parts needs to be improved.

Images