External wall soft elastic anti-cracking putty powder and preparation process thereof

Abstract

The invention discloses external wall soft elastic anti-cracking putty powder and a preparation process thereof, and belongs to the field of building materials, wherein the external wall soft elasticanti-cracking putty powder comprises the following raw materials: modified heavy calcium carbonate, kaolin powder, silicate, calcium hydroxide, ash calcium powder, whiting powder, modified talc powder, quartz, diatomaceous earth, rubber powder, bentonite powder, pure acrylic elastic emulsion, polyvinyl alcohol, zinc white powder, sodium carboxymethyl cellulose, ethylene glycol, redispersible latexpowder, an auxiliary agent, and an antifoaming agent. According to the present invention, the external wall soft elastic anti-cracking putty powder is prepared through mixing, stirring, grinding andother steps; the ratio of the raw materials is rational, the preparation method is simple, and the production process is safe and environmentally friendly; and the external wall soft elastic anti-cracking putty powder can well protect walls, wherein the wall cannot produce cracks, cannot produce hollowing, peeling and dust shedding after being wet, and has long service life.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a soft, elastic, crack-resistant putty powder for exterior walls and a preparation process thereof. Background technique [0002] With the improvement of people's living standards, the awareness of environmental protection is also increasing. A survey by indoor environment experts shows that modern people spend an average of 90% of their time indoors and 65% of their time at home. Experts believe that following the "soot type" and "photochemical smog type" pollution, modern people are entering the third era of pollution marked by "indoor air pollution". Indoor air pollution has caused 35.7% of respiratory diseases, 25% of chronic lung diseases, and 15% of tracheitis, bronchitis, and lung cancer. At present, the annual excess death toll caused by indoor air pollution in China has reached 111,000, the excess number of emergency visits is as high as 4.3 million, and the...

AI Technical Summary

Problems solved by technology

At present, ordinary putty powder has many disadvantages such as poor water resistance, low strength, non-durability, and easy powder drop. Most of the walls have cracking phenomenon after using putty powder, especially on the outer wall.

Due to the long-term exposure to wind, sun, rain, and the low acid and alkali resistance, low weathering resistance coefficient, fast aging speed, and low UV resistance coefficient of ordinary exterior wall putty powder, the external wall coating is generally cracked.

The traditional external wall elastic putty powder is made of elastic resin and additives to dry and form a film, relying on the high elasticity and elongation of the elastic resin to resist cracking, but because of poor air permeability, it is easy to bubble and peel off in the water seepage and leaking parts of the building

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