Modified epoxy resin, preparation method of modified epoxy resin, emulsion preparation method of modified epoxy resin and application thereof

Abstract

The invention belongs to the technical field of waterproof coatings for engineering, and discloses a modified bisphenol epoxy resin, a preparation method of the modified bisphenol epoxy resin, a preparation method of an emulsion of the modified bisphenol epoxy resin and an application thereof. The product comprises a component A and a component B, the a component A is prepared from 10 to 25 parts of modified bisphenol epoxy resin emulsion according to claim 4, 10 to 90 parts of acrylate emulsion, 1 to 5 parts of water, 0.15 to 0.2 part of dispersing agent, 0.15 to 0.65 part of defoaming agent and 0.15 to 0.3 part of wetting agent, and the component B is prepared from 30 to 90 parts of cement, 30 to 60 parts of filler, 0.1 to 0.6 part of water reducing agent and 3 to 8 parts of curing agent. Compared with the prior art, the modified epoxy resin prepared by the invention has preferential adsorbability with cement particles, temperature change resistance, stronger adaptability to expansion and shrinkage of cement and better anti-aging effect, and the modified epoxy resin and the acrylate emulsion are reasonably proportioned, so that the waterproof coating disclosed by the invention is better in water resistance and physical performance, and through the synergistic effect of the MD650 epoxy resin curing agent and the MD2542 epoxy resin curing agent, the waterproof coating can be rapidly cured in a humid environment.

Description

technical field [0001] The invention belongs to the technical field of engineering waterproof coatings, and specifically relates to a modified epoxy resin, a preparation method and an emulsion preparation method thereof, and the application of waterproof coatings. Background technique [0002] Polymer cement waterproof coating, referred to as JS waterproof coating, J refers to polymer, S refers to cement, so JS is polymer cement waterproof coating. Polymer cement waterproof coating is an organic liquid material composed of polyacrylate emulsion, ethylene-vinyl acetate copolymer emulsion and other polymer emulsions and various additives. [0003] Polymer cement waterproof coating is a two-component, water-based building waterproof coating made of inorganic powder composed of cement, quartz sand, light and heavy calcium carbonate and other inorganic fillers and various additives through reasonable proportioning and compounding. In construction engineering, JS-composite waterp...

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Problems solved by technology

[0010] After the above cement waterproof coating is used in combination with cement, it will have a good waterproof effect in a short period of time, but as time changes, especially for some water conservancy projects, the humid environment and the temperature brought by the alternation of winter and summer for several years The change will cause the cement molecules to have expansion and contraction reactions. With the expansion and contraction of the cement molecules, the coating will slowly split and age under force, making it difficult to attach to the surface of the cement molecules, which will reduce the water resistance of the waterproof coating and allow water molecules to penetrate into the cement.

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