Isolation coating used for pre-laid and wet-laid waterproofing sheets and preparation method of coating

Abstract

The invention discloses an isolation coating used for pre-laid and wet-laid waterproofing sheets and a preparation method of the coating. The isolation coating used for the pre-laid and wet-laid waterproofing sheets comprises the following components in percentages by mass: 10%-40% of a modified acrylate copolymer emulsion, 5-10% of a VAE emulsion, 10%-35% of a crystallization masterbatch, 5%-20%of a pigment filler, 0.1%-1% of a dispersing agent, 0.1%-1% of a thickener, 0.1%-0.5% of a defoaming agent, 0.1%-0.5% of a levelling agent, and 10%-35% of water. The isolation coating used for the pre-laid and wet-laid waterproofing sheets provided by the invention can be used for isolation protection of a self-adhesive layer of the pre-laid anti-adhesive waterproofing sheet, can also be used forisolation protection of a self-adhesive layer of the wet-laid waterproofing sheet, is a water-based coating, and has environmentally-friendly safe production and use processes and good flexibility; and the waterproofing sheets prepared by the coating have adhesion that is not easy to return, are convenient for construction, and have excellent water resistance, acid-alkali corrosion resistance, heat aging resistance and ultraviolet aging resistance.

Description

technical field [0001] The invention relates to the field of waterproof materials, in particular, the invention relates to an isolation coating for pre-laying wet-laid waterproof coiled materials and a preparation method thereof. Background technique [0002] With the advancement of technology, the old-fashioned waterproof membrane is gradually replaced by a new product. As emerging products, wet-laid self-adhesive waterproof membrane and pre-laid anti-adhesive waterproof membrane have become more and more widely used in construction applications in recent years because of their construction methods. Safer and more environmentally friendly, with better waterproof effect. However, at present, the traditional domestic wet-laid waterproofing membrane and pre-laid waterproofing membrane still face some technical difficulties. For example, wet-laid waterproofing membrane generally needs to be covered with a layer of anti-adhesive film on the self-adhesive layer, which needs to be...

AI Technical Summary

Problems solved by technology

However, at present, the traditional domestic wet-laid waterproofing membrane and pre-laid waterproofing membrane still face some technical difficulties. For example, wet-laid waterproofing membrane generally needs to be covered with a layer of anti-adhesive film on the self-adhesive layer, which needs to be uncovered during construction. Laying on the side of the mucous membrane requires a large number of construction workers, and the construction is cumbersome; pre-paved waterproof membrane products generally use inorganic particles as the isolation layer, and the combination of inorganic particles and pressure-sensitive adhesive is weak, and it is easy to appear in the process of construction and application. The sand phenomenon, and the inorganic particles cannot completely cover the pressure-sensitive adhesive layer, resulting in the direct exposure of the pressure-sensitive adhesive to the air, which is easily oxidized or corroded by oxygen in the air or oxidized or corrosive substances in the water body, and damaged by ultraviolet rays in the sun, resulting in Pressure Sensitive Adhesives Degrade Dramatically Over Time

At present, there have been reports at home and abroad that water-soluble coatings are used instead of ordinary isolation membranes for wet laying and pre-laying waterproof membranes. However, due to the use of water-soluble coatings, this type of product waits for pouring after production, transportation, storage and construction. During the cycle of the concrete, it cannot be exposed to water, and the isolation layer is not flexible enough, and it is easy to break during the process of production, transportation, and spreading, and cannot be unrolled. These restrictive factors greatly reduce the application and promotion of this product.

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