Waterproof thermal insulation coating for building exterior wall and preparation method thereof

Abstract

The invention discloses a waterproof thermal insulation coating for a building external wall and a preparation method thereof. The waterproof thermal insulation coating is prepared from the followingraw materials in parts by weight: 10-20 parts of hollow glass beads, 30-40 parts of modified attapulgite filler, 30-60 parts of modified styrene-acrylic emulsion, 0.3-5 parts of a coalescing agent, 0.2-2 parts of a defoaming agent, 0.2-3 parts of a preservative and 0.6-4 parts of a dispersing agent. According to the invention, silicon is introduced into the styrene-acrylic emulsion; the high and low temperature resistance, the illumination aging resistance, the water resistance and the oxidation resistance of the styrene-acrylic emulsion are improved; therefore, the prepared coating has good waterproof and anti-aging properties; meanwhile, the solid-phase material is prepared into a slurry state and then is mixed with the styrene-acrylic emulsion and thus all materials can be uniformly mixed; in addition, the hollow glass beads are finally added into the emulsion mixture to be uniformly mixed so that the structural integrity of the hollow glass beads can be guaranteed, the hollow glassbeads are uniformly dispersed, and a good heat preservation and insulation effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation building materials, and in particular relates to a waterproof thermal insulation coating for building exterior walls and a preparation method thereof. Background technique [0002] As the outermost structure of the building, the outer wall of the building is directly affected by the outside wind and rain and sunlight. Therefore, the appearance and external protection of a building mainly rely on the protective structure of the outer wall, but because the outer wall of the building is mainly It is composed of mortar concrete, so under long-term rain intrusion and ultraviolet light conditions, the exterior wall material is prone to cracks and discoloration due to aging, so it needs to be coated with a layer of paint on the exterior wall for protection; the heat exchange inside and outside the building caused Building energy consumption is an important part of energy consumption at present...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the coatings used for exterior walls mainly have the effect of waterproofing and anti-corrosion, but it is difficult to make the coatings have a good thermal insulation and protection effect while ensuring a good waterproof effect, and the coating thickness of the coatings used for exterior walls is relatively large. Aging cracks will also appear after long-term use. In order to solve the above problems, a waterproof and thermal insulation coating for building exterior walls and its preparation method are provided. The present invention provides the following technical solutions