Quick-drying building waterproof coating

Abstract

The invention discloses a quick-drying building waterproof coating. The quick-drying building waterproof coating is prepared from a ketazine / silicon oxide composite modified room-temperature self-crosslinking macromolecular polymer emulsion, an acrylic polymer emulsion, a protective agent, a stabilizer, a penetrating agent, a dispersing agent, a mildew-proof agent, an anti-corrosion and bactericidal agent, a defoamer and other aids and pigment fillers through an advanced processing technology, and has the advantages of high drying speed, quick strength development, good water resistance, alkali resistance, acid resistance and salt resistance and high adhesion to a base layer.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a quick-drying waterproof coating for buildings. Background technique [0002] Architectural waterproof coatings, also known as coating waterproof materials, are amorphous materials (liquid, viscous, powder and water mixed on site, liquid and powder mixed on site) after on-site brushing, scraping, wiping, spraying, etc. coating construction, can be applied to structures The surface is cured to form a film material with waterproof ability. Since the end of the 1950s, architectural waterproof coatings have been used on a large scale. [0003] According to different solidified film-forming substances, architectural waterproof coatings can be divided into organic, inorganic and organic-inorganic composites. Inorganic building waterproof coatings include imported Guarantee, M1500, domestically developed Waterproof, HM1500, TM1500 and cement-based permeable cry...

AI Technical Summary

Problems solved by technology

Although tar-based polyurethane waterproof coatings have reactivity, low cost, and are easy to promote, they contain a large amount of volatile substances such as anthracene, naphthalene, and phenols, which seriously pollute the environment and endanger human health. At present, many provinces and cities in China have begun to ban use

Asphalt-based polyurethane waterproof coatings are added with petroleum asphalt, which has the advantages of smooth appearance, gloss, good leveling, and increased elongation, but the disadvantages are also very obvious

Petroleum asphalt does not contain active hydrogen, and it only acts as a filler in the coating; and the heterocyclic compounds such as sulfur, oxygen, nitrogen, etc. have certain toxicity; the hydrophobic effect of asphalt has a certain impact on the recoatability of the coating

Coumarone resin modified polyurethane waterproof coating was developed on the basis of improving the shortcomings of tar type and asphalt type. Although various performances have been improved to a certain extent, these three types of polyurethane coatings all have darker colors, tar type and asphalt type. The asphalt type is black, and the Coumarone resin modified type is brown to dark brown, which also limits its application range

Although white polyurethane waterproof coatings, waterborne polyurethane waterproof coatings, and one-component polyurethane waterproof coatings have also been developed on the market, although these coatings have solved some existing problems: first, some aspects of coating performance still need to be improved; second, the price The third and most critical problem is that the curing mechanism is still the same, and the system still contains free isocyanate, such as TDI and MDI, which are highly toxic and easy to cause cancer

It has the characteristics of convenient construction, water-based environmental protection, etc., but because of its film-forming mechanism, as the water continues to escape, the polymer particles become viscous particles and approach each other, and the plastic deformation and aggregation of the polymer particles occur to form a film. It is a physical effect, so the film forming speed is slow, the maintenance time is long, and the shortening of the construction period is restricted; and because the polymer latex particles are extruded into the film, the water resistance, alkali resistance, acid resistance and salt resistance of the coating film are poor. The use strength will be greatly reduced in the environment of water, alkali, acid and salt, which seriously affects the waterproof effect and service life

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