Anti-sagging quick-drying two-component polyurethane waterproof paint as well as preparation method and application thereof

Abstract

The invention discloses an anti-sagging quick-drying two-component polyurethane waterproof paint, which comprises a component A and a component B. The weight ratio of the component A to the componentB is (1: 1)-(1: 2), and the component A is mainly prepared from polytetrahydrofuran ether glycol, aliphatic isocyanate, a plasticizer, a chain extender and a catalyst A; and the component B is mainlyprepared from ethylene diamine polyether, polyaspartate polyurea resin, a plasticizer, carbon black, a catalyst B, an inorganic filler, a thixotropic agent and other assistants. The preparation methodcomprises the following steps: carrying out vacuum dehydration on polytetrahydrofuran ether glycol, cooling, and adding other components to prepare the component A; uniformly dispersing ethylene diamine polyether and polyaspartic acid ester polyurea resin, adding other components, and grinding to obtain the component B; the waterproof paint is an aliphatic polyurethane waterproof paint, a concrete protective layer is not needed in waterproof layer construction, the waterproof paint can be directly exposed, meanwhile, a concrete protective layer is not needed, the sagging resistance value of the waterproof paint is 500 [mu]m or above, surface drying and hard drying are fast, and the product maintenance period is shortened.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to an anti-sag and quick-drying two-component polyurethane waterproof paint and a preparation method and application thereof. Background technique [0002] During the hydration reaction of concrete, many tiny channels or holes will be produced, making it easy for external corrosion factors to penetrate into the interior of the concrete, causing corrosion of steel bars and cracking of concrete, and the durability of the overall structure is reduced. In order to prevent external factors from damaging concrete structures such as tunnels, bridges, building roofs, and underground works, waterproof and anti-seepage engineering is very important. Relatively speaking, surface coating technology is an economical and practical protection technology. [0003] The construction of traditional polyurethane waterproof layer is generally polyurethane waterproof coating + concrete protective laye...

AI Technical Summary

Problems solved by technology

[0003] The construction of traditional polyurethane waterproof layer is generally polyurethane waterproof coating + concrete protective layer, while polyurethane waterproof coating is basically composed of aromatic isocyanate and polyether polyol, so that the waterproof layer cannot be exposed, and the plane generally needs 2~ 3-pass forming, 4-8 pass forming for facade or inclined surface, resulting in long construction delivery period of the product, serious waste during construction, resulting in limited use, and long maintenance period of the product, these objective factors limit its application field

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