Waterborne external thermal insulation coating and preparation method thereof

Abstract

The invention provides a waterborne external thermal insulation coating. The coating consists of the following components in part by weight: 25 to 50 parts of functional filler, 30 to 50 parts of emulsion, 20 to 35 parts of filler, 8 to 20 parts of film-forming aid, 1 to 3 parts of wetting dispersant, 1 to 2 parts of propylene glycol, 1 to 2 parts of defoaming agent, 0.5 to 1.5 parts of mildew preventive, 1 to 5 parts of thickening agent and 10 to 20 parts of water. The invention is characterized in that: the coating is safe and environment-friendly, has excellent waterproof and anticorrosive properties, high thermal resistance and reflectivity, excellent thermal insulation property, and good weather resistance, is convenient to construct, and can be well adhered to various base materials, and the density of a dry film is low; an extremely thin hollow cavity layer is formed after the coating is coated on the surface of a base material and then is dried, so that an effective thermal barrier is formed; functional filler particles have large heated cathodes, low coefficient of thermal conductivity, and high heat reflectivity; the consumption of energy sources is remarkably reduced; the coating can reflect, refract and scatter thermal radiation and stop heat conduction; and the energy is saved.

Description

technical field [0001] The invention relates to a universal environment-friendly thermal insulation coating, in particular to a water-based external thermal insulation coating and a preparation method thereof, belonging to the field of thermal insulation coatings. Background technique [0002] In recent years, under the advocacy and guidance of the country to establish a low-carbon economy, various industries are researching new methods and new processes for energy saving. Due to the simple construction process of coatings, seamless construction can be achieved and the existence of thermal bridges can be reduced. The research on thermal insulation coatings has become a hot spot. [0003] Thermal insulation coatings are generally divided into two categories: 1. Barrier thermal insulation coatings are coatings that achieve thermal insulation through the high thermal resistance of the coating itself. It is a thick film coating. When the coating is applied, it is applied to a ...

AI Technical Summary

Problems solved by technology

However, the production time of this kind of coating is long, and the metal coating is greatly affected by the environment. Dust and acid rain will have a huge impact on the performance of this coating.

The invention patent with the publication number CN1986661A discloses a kind of insulating coating with hollow glass microspheres as additives, which can reduce the surface of various objects, reduce their surface temperature and internal temperature, thereby improving the working environment and achieving the purpose of saving energy and reducing consumption. However, the existing hollow glass microspheres have poor wettability with water, are difficult to disperse in the paint and are easy to segregate during storage. After coating, they are not firmly adhered to the base layer and have poor durability.