Thermal insulation and waterproof paint based on silica aerogel modification and preparation method of thermal insulation waterproof paint

Abstract

The invention discloses thermal insulation and waterproof paint based on silica aerogel modification. The paint is prepared from the following raw materials in percentage by weight: 55%-70% of aerogelacrylic emulsion mixed slurry, 25%-40% of functional filler, 1% of a wetting agent, 3% of a coalescing agent and 1% of a defoaming agent, wherein the aerogel acrylic emulsion mixed slurry is formed by mixing aerogel powder and acrylic emulsion, and aerogel is silica aerogel with water glass as a silicon source. The cheap and easily available water glass is used as the silicon source of the aerogel, and the silica aerogel is prepared in a normal temperature and normal pressure mode, so that the cost is low, the product has excellent thermal insulation performance, and popularization and application of the aerogel are facilitated. Therefore, the mixture of the aerogel powder and the acrylic emulsion is used as a water-based base material and matched with the wetting agent, the coalescing agent and the defoaming agent for preparation. The thermal insulation and waterproof paint with good thermal insulation and waterproof functions is prepared.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a thermal insulation and waterproof coating based on silica airgel modification and a preparation method thereof. Background technique [0002] Silica airgel has nanopores and is a porous solid material with low density and high porosity. The thermal conductivity can be as low as 0.013w / m·K, and it has super thermal insulation performance. The fine nano-network structure of silica aerogels effectively limits the propagation of localized thermal excitations, and its solid-state thermal conductivity is 2–3 orders of magnitude lower than that of corresponding glassy materials. Nano-micropores suppress the contribution of gas molecules to heat conduction, and become an ideal transparent thermal insulation material, which has been applied in solar energy utilization and building energy saving. The Chinese patent "A high thermal insulation airgel coating based on silica (...

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Problems solved by technology

Thermal insulation materials on the market can be divided into two categories: organic and inorganic according to different materials. Organic thermal insulation materials are mainly: foamed polyurethane, polystyrene board, phenolic foam, etc., but this type of material is easy to age, and it is easy to burn when exposed to open fire. And release toxic gas, most of the construction is panel splicing, which is easy to cause water seepage in the building

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