Novel polyurethane coating for waterproof roll as well as preparation method and application of novel polyurethane coating

Abstract

The invention discloses a novel polyurethane coating for waterproof coiled materials and a preparation method and application thereof.The novel polyurethane coating comprises a component A and a component B. The component A is a polyurethane prepolymer, and the polyurethane prepolymer is prepared through a reaction of isocyanate and first polyol; and the component B comprises petroleum resin, second polyol, a filler, a curing agent and an auxiliary agent. The polyurethane coating disclosed by the invention has more contact points with the waterproof coiled material before curing, so that microscopic full adhesion is formed between the polyurethane coating and the surface of the waterproof coiled material, the adhesion effect is good, the performance is reliable, and the high-grade waterproof requirement is met.

Description

technical field [0001] The invention relates to the technical field of production of building engineering materials, in particular to a novel polyurethane coating for waterproof coiled materials, and also relates to a preparation method of the novel polyurethane coating. In addition, the present invention also relates to the application of the new polyurethane coating, such as being used in combination with waterproof coiled materials to produce waterproof and thermal insulation integrated boards. Background technique [0002] Waterproof roll material is mainly used in building walls, roofs, tunnels, roads, landfills, etc., to resist external rainwater and groundwater leakage, a flexible building material product that can be rolled into rolls, as an engineering foundation and building There is no leakage connection between objects, which is the first barrier for waterproofing of the whole project and plays a vital role in the whole project. [0003] At present, the commonly...

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Problems solved by technology

[0004] First, the compatibility of waterproof coatings and waterproof membranes generally requires an isolation layer such as a mortar layer between the waterproof coating and waterproof membranes to avoid adverse effects such as mutual corrosion or migration of plasticizers. The setting will cause water to flow freely between the waterproof coating and the waterproof membrane, so that the isolation layer is equivalent to the water channeling layer, and cannot fully utilize the 1+1>2 waterproof performance that is presented by the mutual help and compensation of the two. Effect

[0005] Second, the limitations of construction technology

However, there are some problems at the construction site. The hot-melt non-curing coating has the following outstanding problems in the process of heating and melting at the construction site: 1. The existence of factors such as uncontrolled heating temperature and uncontrolled heating time seriously affect the quality of the product. Quality assurance in the later stage; 2. The smoke on the construction site has a very large impact on the health of the site personnel, and the pollution to the environment is obvious

[0006] Third, the problem of film formation and curing of waterproof coatings. If the water-emulsion waterproof coating is applied and the coil is pasted immediately, the film-forming quality of the coating will be poor or even impossible to form a film at all. Even after the coating is completely cured, the waterproof coil is pasted material, its paste quality will not be guaranteed due to secondary pollution on the surface of the coating film, limited viscosity of the bonding material, etc.

However, due to the limitations of the construction site operation process and monitoring means, it is easy to have problems of uneven thickness and cutting corners, so it is not popular to use alone

[0008] However, polyurethane waterproof coating is a polar material with high surface energy, and it cannot be directly compounded with the waterproof membrane during actual use. It is necessary to add a layer of mortar between the coating layer and the membrane, so that there is a water channeling layer. Unable to form the effect of 1+1>2

In addition, the existing polyurethane waterproof coatings all have varying degrees of light component migration, resulting in a significant decrease in the bonding effect with asphalt waterproof membranes, and what is more, directly softens asphalt waterproof membranes, reducing the waterproofing system. waterproof effect

Practice has proved that polyurethane waterproof coating and asphalt waterproof membrane cannot form a reliable composite waterproof layer

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