Self-crosslinking type waterproof emulsion, preparation method of waterproof emulsion and waterproof base film prepared by utilizing waterproof emulsion

Abstract

The invention relates to the technical field of film-forming materials and in particular relates to a self-crosslinking type waterproof emulsion, a preparation method of the waterproof emulsion and a waterproof base film prepared by utilizing the waterproof emulsion. The emulsion comprises the following raw materials in parts by weight: polyisocyanates, low polymer polyols, a chain extender, an end-capping reagent, a catalyst, a comonomer, an emulsifier, an initiator, a pH regulator and deionized water, wherein the comonomer is a mixture of a hard monomer, a soft monomer and a functional monomer according to a mass part ratio of (30-50):(10-20):(5-20). The emulsion can realize self-crosslinking and is high in crosslinking degree and high in weather resistance; the preparation method is simple in preparation process, and the environmental pollution is avoided in the preparation process; and the prepared waterproof base film is high in crosslinking degree, high in water resistance, high in impact resistance, high in tear resistance and high in binding force with the base surface and has relatively high flexibility and high weather resistance.

Description

Technical field [0001] The invention relates to the technical field of film forming materials, in particular to a self-crosslinking type waterproof emulsion, a preparation method thereof, and a waterproof base film prepared by using the waterproof emulsion. Background technique [0002] In the prior art, the base film is a wall surface treatment material with anti-alkali, moisture-proof, and mildew-proof functions, which can effectively prevent the moisture and alkaline substances from the construction base surface from leaking out, and avoid the wall decoration materials: Bad damage to wallpaper, paint layer, plywood, decorative board, such as dampness, mildew and black. However, as there are more and more problems in buildings nowadays, cracks and water seepage problems are getting more and more serious. Ordinary base film products cannot cope with such a harsh wall environment at all, which greatly reduces the use of wall decoration materials. life. [0003] There are also som...

AI Technical Summary

Problems solved by technology

However, as there are more and more problems in today's buildings, the problems of cracks and water seepage are becoming more and more serious. Ordinary base film products cannot cope with such a harsh wall environment, which greatly shortens the use of wall decoration materials. life

[0003] There are also some base films with waterproof function on the market, some are solvent-based waterproof base films, and their environmental friendliness is poor; some replace solvent-based base films with water-based waterproof base films. Difference

At the same time, a two-component waterproof base film with excellent waterproof performance and good environmental protection performance has also appeared. However, this type of base film is relatively complicated and has high requirements for on-site operations, because the A\B of the base film must be adjusted before use. The components are mixed evenly, the curing and crosslinking process can be fully achieved, and the waterproof effect of the base film can be optimized

And because the two components of the two-component base film are separated before use, it will also bring a lot of inconvenience to its production, packaging and transportation.

[0004] The application number is 201110388142.6, which discloses a self-crosslinking acrylic emulsion at room temperature and its preparation method. The preparation method of this method is complicated, requires multiple initiations of polymerization, and the preparation time is long, which is not conducive to mass production.

[0005] The application number is 201110423428.3, which discloses a room temperature self-crosslinking styrene-acrylic emulsion resistant to ethanol dilution and its preparation method. Coating film