Waterproof paint with improved hydrophobic property

Abstract

The invention relates to the technical field of paints, specifically to a waterproof paint with an improved hydrophobic property. The waterproof paint with the improved hydrophobic property comprisesthe following components: amine-terminated polyether, hydroxyl terminated polyether, isocyanate, dioctyl phthalate, a chain extender, hydrophobic modified fillers, a catalyst, cyclohexane, a silane coupling agent and an auxiliary, wherein inorganic fillers contained in the hydrophobic modified filler are kaolin, a talcum powder and light calcium carbonate; the surfaces of the inorganic fillers aretreated by using a modifier with taking an organic silane coupling agent, stearic acid, ethylene glycol and acetic acid as main components so that the hydrophobic property of the inorganic fillers and the compatibility between the inorganic fillers and a polyurethane polymer are both improved. Therefore, the hydrophobic property of the modified waterproof paint is improved, and the stability andthe weather resisting performance of the material are improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a waterproof coating with enhanced hydrophobicity. Background technique [0002] Waterproof coating is a one-component environment-friendly waterproof coating for liquid construction, which is based on imported polyurethane prepolymer. It solidifies after contact with moisture in the air, and can form a solid, tough, seamless, integral waterproof membrane on the surface of the base. The construction process of this coating is simple, there is no specific requirement on the structure and properties of the base material, the bonding effect is good, and the curing time is relatively low. [0003] There are two types of polyurethane waterproof materials on the market: one is ordinary polyurethane waterproof coatings; these materials are generally made of polyurethane and coal tar as raw materials. The tar gas it volatilizes is highly toxic and not easy to remove. The polyurethane...

AI Technical Summary

Problems solved by technology

However, due to the poor hydrophobicity of the cement base material in polymer cement-based waterproof coatings, the waterproof performance of this coating is generally lower than that of ordinary polyurethane waterproof coatings.

In addition, due to the use of inorganic filler components in the coating, this material has poor compatibility with organic polymers, and the weather resistance is relatively low, and the curing time of the coating is longer

[0004] Patent Publication No. CN105462479A provides an environment-friendly weather-resistant self-layering single-component waterproof coating and its preparation method. In the waterproof coating, water-based polyurethane emulsion, water-based polyurethane modified fluorocarbon resin emulsion, bactericide, and defoamer are not used. Inorganic filler, so the stability of this type of waterproof coating is better, but the weather resistance of the coating is poor, the corrosion resistance and anti-aging performance are insufficient, the strength of the material is low, and it is easy to age and fall off during use

[0005] Patent Publication No. CN104559733A discloses a two-component polyurethane coating, adding heavy calcium, carbon black and talcum powder as inorganic fillers in the coating, which can improve the mechanical strength and weather resistance of the coating, but due to the interaction between the inorganic filler and the organic solvent Poor capacity, poor chemical stability of the coating, insufficient bonding performance, due to the use of inorganic fillers, the hydrophobicity of the coating is correspondingly reduced

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