Polyurethane modified asphalt waterproof paint for buildings and production method thereof

Abstract

The invention relates to a polyurethane modified asphalt waterproof paint, which is composed of the following raw materials by weight: 25-30 parts of a polyurethane prepolymer; 70-75 parts of 90# petroleum asphalt; 40-60 parts of water; 20-25 parts of polychloroprene latex; 4-7 parts of an emulsifier; 2-4 parts of polyvinyl alcohol; 1-3 parts of a coupling agent; 1-2 parts of polypropylene glycol;3-5 parts of trihexyl o-acetylcitrate; 0.1-0.5 part of pentaerythritol ester of hydogenated rosin; 1-3 parts of polyacrylamide; and 10-15 parts of modified nano calcium carbonate. The polyurethane modified asphalt waterproof paint prepared by the method provided by the invention has good film compactness and high stability, a waterproof layer formed by the waterproof paint in a building has largebonding strength with a building base surface and good waterproof effect, moreover, after modification, the product has substantially improved water tolerance, aging resistance, acid and alkaline resistance and the like, has a simple making process, and overcomes the disadvantages of tedious making, poor film compactness, poor waterproofness and aging resistance in previous water emulsified asphalt paint.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to a polyurethane modified asphalt waterproof coating for construction and [0002] its method of production. Background technique [0003] The waterproof problem of buildings is not only related to people's work and living environment, but also affects the service life of buildings. Building waterproof materials refer to materials that prevent rainwater, groundwater, water supply and drainage, corrosive liquids, and moisture and steam in the air from intruding into buildings. The parts of the building that need to be waterproofed are mainly the roof, wall, ground and basement, and the construction is mainly carried out through coating, spreading, filling, pouring, bonding and other processes. Since the development of domestic waterproof materials, an industrial system with relatively complete categories and relatively complete production and application technologies has basically...

AI Technical Summary

Problems solved by technology

Although the above-mentioned two documents have modified asphalt to obtain better waterproof coatings, they have not modified the fillers used in the preparation of bitumen waterproof coatings, such as barium sulfate and talcum powder. properties, and unmodified fillers will have obvious disadvantages when filled in various polymers when used in the preparation of coatings: one is that the surface is hydrophilic and oleophobic, and the dispersion in the polymer is poor; the other is that it is compatible with the polymer body Poor binding force, can only play a role in compatibilization

However, the production of water-emulsified asphalt is cumbersome, and the biggest disadvantage is that because it is water-based, its film-forming compactness is poor, so waterproof and aging resistance are poor; and solvent-based asphalt cannot be used indoors due to the presence of a large amount of harmful organic substances.

At present, the water-based asphalt-based waterproof coatings on the market have poor stability, poor alkali resistance and acid resistance, and various technical indicators are difficult to meet the relevant requirements.

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