Properties of Building Thermal Exterior Wall Coatings

Update time:2022-08-16

Many people are in construction paint, because there are various products on the market, and certain screening is required. The quality of different exterior wall paints and interior wall paints also has certain differences.

Appearance decoration material coating is preferred

Insulation can not only solve the insulation problem, but also reduce the thickness of the wall and reduce the construction cost. External wall insulation is the most effective way to save energy in energy-saving buildings. As an application of exterior materials, building insulation coatings are the first choice.

In our country, more mature and external wall insulation system: polystyrene board thin paste external wall insulation system, thermal insulation and thermal insulation glue powder polystyrene particle external wall insulation paste system, cast-in-place concrete composite net free polystyrene board Exterior wall external insulation system, cast-in-place concrete composite polystyrene wire frame, mechanically fixed polystyrene board external wall external insulation system wire frame board external wall external insulation system. In addition, external insulation systems such as rock wool, polyurethane, and extruded polystyrene panels were developed and applied. Building energy saving in Western Europe and the United States, the external wall insulation system is widely used, the main insulation board and thin plastering method is stuck outside, there are two kinds of insulation materials: flame retardant and non-combustible rock wool board eps, both decorated with coating layer . External insulation systems were first used in Europe to compensate for cracks in walls.

External wall thermal insulation coating has low thermal conductivity, easy construction, oil resistance, acid and alkali resistance, and low pollution coefficient. It is the most ideal thermal insulation material in the external wall thermal insulation industry. There are many kinds of exterior wall thermal insulation coatings, ceramic thermal insulation coatings, hydrophobic silicic acid thermal insulation coatings, rubber powder polystyrene particle exterior wall thermal insulation coatings, etc. Water-based liquid paint for ceramic thermal insulation coatings, ultra-fine hollow ceramic microspheres are pretreated and mixed with high-quality latex, and have high heat reflectivity and emissivity, which can effectively reduce the energy consumption of cooling in summer and heating in winter for buildings. Hydrophobic silicate insulating varnish is made of high-quality sepiolite velvet, aluminum silicate fiber, expanded perlite, silicone and other high-quality thermal insulation materials and polymer compounds. It has excellent thermal insulation performance and is widely used in wall Body, storage tank, cold storage and other pipeline insulation. Coating is a new type of insulating material, mainly composed of two main components: gelatin and polystyrene.

At present, relatively good exterior wall thermal insulation coatings have the advantages of good weather resistance, low thermal conductivity, stable thermal insulation performance, high softening coefficient, freeze-thaw, and aging resistance. The adaptability to matrix deformation is strong, which effectively prevents the occurrence of wall cracks. The system has no cavity, strong negative wind pressure resistance, suitable for multi-storey and high-rise buildings; good air permeability, strong breathing function, good waterproof function, and can remove moisture from the insulating layer; convenient and fast construction, multi-layer construction . The fire resistance level can meet the comprehensive advantages of b1 level and above.