A spray film waterproof material with high cross-linking density

Abstract

The invention discloses a spray film waterproof material with high cross-linking density, which comprises two-component A and B main liquids, an oxidizing agent and a reducing agent; the A main liquid is based on an acrylate mother liquid, adding light calcium carbonate, heavy It is prepared from high quality calcium carbonate, fly ash, silicon carbide and other ingredients. The calcium and magnesium ions in the added ingredients have good compatibility with the ingredients contained in the concrete, and can form chemical bonds with the hydroxyl groups on the surface of the concrete. The base surface produces a stable chemical bond; the fly ash itself has a certain water absorption capacity. In addition to the capillary gaps between the particles, there are also a large number of honeycomb holes, which can improve the water retention of the material; at the same time, the particle size of the fly ash is small , can enter the three-dimensional network structure of the waterproof material to increase the density of the material; the cross-linking agent can increase the cross-linking degree of the material and increase the strength, and its preparation process is simple, the cost is low, and it has high practical value and economic benefits .

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a spray-film waterproof material with high cross-linking density. Background technique [0002] In the construction of underground works, in addition to the self-waterproofing of the concrete structure, it is often chosen to apply a waterproof layer on the periphery of the concrete to protect the facilities inside the structure. There are two types of outer waterproof layer: waterproof coiled material and waterproof coating. Among them, waterproof coating has the advantages of high construction efficiency and overall seamlessness, which has gradually become the development trend of waterproof materials. Acrylate spray film waterproof material is a two-component waterproof coating based on acrylate mother liquor, adding additives and powder. In the actual construction, it is sprayed by special equipment, and the polymerization reaction occurs in the air, and...

AI Technical Summary

Problems solved by technology

Among them, the proportion of acrylate mother liquor has a great influence on the performance of the waterproof layer. When the proportion of mother liquor is low, the crosslinking density of the formed polymer is low, and the waterproof film is viscous and has low strength (generally 1.1-1.5MPa). It is easy to be damaged in practical application; in addition, the waterproof membrane has water absorption characteristics. When the molecular cross-linking density is low, the space between the molecular chains is large, the water absorption rate is high, and the internal stress of the increase in the volume of the waterproof membrane is greater than the bonding force with the base surface, resulting in The material is separated from the base surface. Therefore, we propose a spray film waterproof material with high cross-linking density to solve the problems in the prior art. It can still achieve high cross-linking density when the proportion of acrylate mother liquor is low. the goal of