II-type polymer cement waterproofing coating modified by nano materials and preparation method thereof

Abstract

The invention discloses a II-type polymer cement waterproofing coating modified by nano materials, which consists of a liquid material component and a powder material component, wherein the liquid material component comprises the following ingredients by weight: 85-95 percent of acrylic ester latex, 0.5-2 percent of plasticizer, 0.2-0.4 percent of dispersant, 0.2-0.5 percent of silicone antifoam agent, 0.1-0.3 percent of preservative, 0.3-0.6 percent of active ingredient content of pre-dispersed nano silicon dioxide solution, 0.02-0.06 percent of active ingredient content of pre-dispersed nano alumina solution, and the balance of water. The mixture ratio of the liquid material component to the powder material component is 10:14-20 according to proportions by weight. The invention greatly improves the thixotropy of the coating, prevents coating elevation construction from sagging, reduces loss in coating construction, simultaneously enhances all properties of the coating such as water resistance, alkaline resistance and the like, and obtains obvious effects.

Description

technical field [0001] The invention relates to a polymer cement waterproof coating for construction, in particular to a nanometer material modified type II polymer cement waterproof coating and a preparation method thereof. Background technique [0002] Polymer cement waterproof coating is a water-based and environmentally friendly two-component waterproof material that has emerged in recent years. It is generally composed of liquid components and powder components. According to different physical and mechanical properties, relevant standards divide it into two types: type I and type II. [0003] The main component of liquid material of Type II polymer cement waterproof coating is acrylate emulsion, and the main component of powder material is cement. This product not only has the flexibility of organic polymer materials, but also has the rigidity of inorganic materials. It is easy to construct, seamless, strong in adhesion, non-toxic and harmless, and is widely accepted b...

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Problems solved by technology

[0004] However, in practical application, it is found that the above-mentioned type II polymer cement waterproof coating has the following problems: (1) Long-term soaking in water and alkali causes the coating to absorb water and swell, resulting in a significant decrease in the strength and adhesion of the coating film, and the waterproof function is weakened (2) In actual construction, especially in facade construction, type II polymer cement waterproof coatings tend to sag easily and have poor thixotropy

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