A kind of clear water anti-seepage glue and its preparation method and application

Abstract

The invention relates to the field of organic high-polymer materials, and particularly provides a low-temperature-resistant high-ductility anti-seepage adhesive, and a preparation method and application thereof. The preparation method comprises the following steps: by using a melamine formaldehyde resin as a main material and polyoxypropylene triol as an NCO prepolymer, carrying out reaction with a polymer (TDI (toluene diisocyanate) and / or MDI (methylenediphenyl diisocyanate)) under the action of a thixotropic agent (silicon dioxide) and a tin catalyst in the presence of polypropylene glycol to form a uniform high-polymer flexible material, and mixing with a filler to obtain the anti-seepage adhesive which has the advantages of no pollution, low specific gravity, high ductility, high deformation adaptability, favorable corrosion resistance, favorable low-temperature resistance, favorable freezing resistance and no water permeability. The anti-seepage adhesive has the characteristics of favorable low-temperature flexibility, no crack at -30 DEG C, no water permeability, high stretching resistance (3.10 MPa) and high elongation percentage (1211%). The anti-seepage adhesive can effectively obstruct seepage of earthfill dams, earth water passages and the like, and is a novel synthetic soil engineering anti-seepage material with wide market prospects.

Description

technical field [0001] The invention relates to the field of organic polymer materials, in particular to a low-temperature-resistant and highly extensible anti-seepage glue. Background technique [0002] With the rise of a large number of civil engineering projects and the continuous improvement of environmental requirements, the consumption of anti-seepage membranes is increasing, and it has been widely used in anti-seepage of various projects such as environmental protection and sanitation, solid waste landfills, and industrial and chemical sewage pools. [0003] For a long time, anti-seepage of water embankments has always been a difficult problem. The problem of water seepage seriously threatens the safety of water embankments. Although anti-seepage membranes are also used in water embankments in the prior art, they are usually simply laid and then coated with concrete on the surface. The anti-seepage effect Not good, and short-lived. [0004] The application of geotech...

AI Technical Summary

Problems solved by technology

Although it can fix sand and prevent seepage, it has poor extensibility, poor mechanical properties at low temperatures, short life, and a serious waste of manpower and material resources for maintenance and replacement.

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