Environmental-protection energy-saving thermal-insulated external-wall coating

Abstract

The invention supplies a environment protection energy saving heat preservation exterior wall coating material that contains polyvinyl alcohol 5-10%, acryloid cement 20-40%, cellulose liquor 10-20%, wollastonite in powder 10-30%, see-bubble powder 2-5%, asbestos fiber 1-4%, expanded perlite 5-12%, and water 10-30%. The raw material taking fully mixing to form thick slurry, it could be coated onto the wall. The invention has strong adhesion, high alkali resistance and high water resistance.

Description

Technical field: [0001] The invention belongs to the thermal insulation coating for buildings, and in particular provides a thermal insulation coating suitable for exterior walls and roofs. Background technique: [0002] External wall thermal insulation technology is an important building energy-saving technology that reduces building energy consumption by reducing the thermal conductivity of external walls. The external wall external insulation system commonly used in the world today originated in Europe in the 1960s. It uses polystyrene foam or polyurethane rigid foam as the heat insulation layer, and is connected to the wall through adhesives. Because these foam materials are refractory high molecular polymers, they are pollutants in themselves, which often cause pollution at the construction site and are not easy to clean up. Moreover, due to the short service life, extensive use of this external wall insulation system will inevitably produce a large amount of difficult...

AI Technical Summary

Problems solved by technology

Because these foam materials are refractory high molecular polymers, they are pollutants themselves, which often cause pollution at the construction site and are not easy to clean up.

Moreover, due to the short service life, extensive use of this external wall insulation system will inevitably produce a large number of difficult-to-degrade environmental pollutants in the future

In addition, the existing exterior wall thermal insulation layer is difficult to construct, has many procedures, and is labor-intensive and time-consuming. Generally, there are as many as 8 procedures for exterior wall insulation (adhesive applied on the surface of the foam board, foam board pasted, nailed fixings, foam board Apply polymer mortar on the surface, lay glass fiber mesh cloth, coat polymer mortar on the surface, veneer bricks or paint external wall paints with good crack resistance, water repellency and weather resistance, etc., paint and other external decorative layers), each The processes need to be closely coordinated and interlocking, and the requirements for construction personnel are strict. A slight mistake will affect the overall quality

Due to the structural and fatal defects of the foam insulation material itself, the insulation surface layer cracks and falls off seriously.

Moreover, due to the unreasonable design of the insulation layer, blisters and air bubbles often appear on the insulation wall.