A kind of thixotropic water-based modified asphalt waterproof coating and preparation method thereof

Abstract

The invention provides a thixotropic waterborne modified asphalt waterproof coating. The thixotropic waterborne modified asphalt waterproof coating is prepared from the following components in parts by weight: 28 to 32 parts of anion emulsified asphalt, 6 to 9 parts of neoprene latex, 29 to 32 parts of water, 28 to 33 parts of quartz sand and 0.7 to 1 part of an associated thickener. The inventionfurther provides a preparation method of the thixotropic waterborne modified asphalt waterproof coating. The thixotropic waterborne modified asphalt waterproof coating has the advantages of higher solid content as well as higher coating performance, temperature resistance, flexibility, creep property and thixotropic property.

Description

technical field [0001] The invention relates to a waterproof coating, in particular to a thixotropic water-based modified asphalt waterproof coating and a preparation method thereof. Background technique [0002] As a modern petrochemical raw material, asphalt is widely used in the field of building waterproofing due to its unique hydrophobicity and excellent adhesion. At present, the main products include asphalt coils, sprayed rubber asphalt and various modified asphalt coatings. In recent years, with the emergence of various rubber modifiers, new water-emulsion modified asphalt coatings have been unprecedentedly applied and developed in the field of building waterproofing, and are considered to be a new type of waterproofing that saves energy and resources, protects the environment, and reduces pollution. Material. Different from the construction application of asphalt coils, the application of water-emulsion asphalt coatings is generally divided into spraying, scraping ...

AI Technical Summary

Problems solved by technology

Based on construction factors, this type of coating is mainly applied to spray modified asphalt, usually a two-component system, that is, a water-based system formed by blending and modifying a high-molecular polymer modifier and high-solid emulsified asphalt. Component A, the ionic water solution is the demulsifier component B, the two components are sprayed out through the nozzle of the spraying equipment, and after atomization and mixing, the demulsification and water separation are quickly broken and the film is formed, but the solid content of the emulsified modified asphalt component of this spraying system Generally, it is 55%-60%. During the process of demulsification and film formation, a large amount of water is precipitated, and residual water is easily formed between the coating film and the base layer, which directly affects the bonding performance of the coating film. It is necessary to take multiple sprays and add anti-stripping to the formula. In order to improve the bonding strength between the asphalt coating film and the base surface, the resulting problem is that the construction process directly affects the application effect, and experienced operators are required to ensure that the material can achieve the best in construction application. good effect

[0004] Other water-based modified asphalt coatings that can be directly applied by brushing, scraping and other construction methods are usually subject to the limitations of the production process. In the process of hot mixing to prepare water-emulsion modified asphalt coatings, the addition of modifiers is limited, and it is difficult to add more. The modification of asphalt is not ideal, and the obtained modified emulsified asphalt coating has a low solid content, mostly below 50%; and this type of coating is a one-component leveling coating, which does not have the rapid prototyping characteristics of spraying quick-setting asphalt coatings. The construction of the surface and base plate roof is restricted

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