Exterior wall coating and preparation method thereof

Abstract

The invention relates to the technical field of exterior wall paints, specifically to an exterior wall coating. The exterior wall coating comprises the following raw materials by weight: 500 to 900 parts of sand, 100 to 500 parts of wollastonite powder, 2 to 6 parts of a melamine water reducing agent, 2 to 5 parts of rubber powder, 3 to 5 parts of hydroxypropyl cellulose ether, 2 to 6 parts of a thickening and lubricating agent, 1 to 3 parts of polypropylene anticracking fiber, 3 to 8 parts of a color-fixing and alkali-resisting agent and 10 to 20 parts of pigment. Compared with the prior art, the invention has the following beneficial effects: the coating is prepared with sand as a main material and nanometer polymer materials, mineral silicon-aluminum materials and natural mineral pigments as auxiliary materials by mixing; and the coating is free of any toxic and harmful substances and organic chemical compounds, is absolutely free of formaldehyde and is a purely-green environment-friendly product.

Description

technical field [0001] The invention relates to the technical field of exterior wall paint, in particular to an exterior wall paint and a preparation method thereof. Background technique [0002] Exterior wall coatings are necessary materials for modern architectural decoration projects. Coatings play an important role in regulating temperature and humidity of buildings, air microcirculation and purification, natural comfort of living, protection of ecological environment, protection of building life, and beautification of urban environment. very important value. [0003] Since the reform and opening up more than 30 years ago, with the development of the chemical industry, batches of new chemical coatings have emerged in China's architectural exterior wall decorative coatings. , lime paste, three-in-one ash and other traditional decorative plastering materials. Twenty years ago, exterior wall coatings with polyvinyl alcohol as the adhesive base material began to appear in t...

AI Technical Summary

Problems solved by technology

[0005] At present, latex paints and real stone paints used in the decoration of urban construction exterior walls in our country will have fading and yellowing, shrinkage cracks, pulverization, hollowing, peeling and peeling phenomena, and they are very common. You can see them everywhere when you visit any city in China. The big painted face formed after the paint on the exterior wall falls off. In some cities, in order to pursue a civilized city and urban environment, the buildings along the street will be repainted in three to five years, which will cause a great waste of social wealth and bring huge pollution to the atmospheric environment.