Crylic acid emulsion coating having three-in-one functions of decoration, thermal insulation and water resistance and preparation method

Abstract

The invention discloses an acroleic acid emulsion paint with ornamental, heat-proof and water-proof effect and preparing method, which comprises the following steps: (1) allocating raw material with 7-20% active calcium carbonate, 5.5-15% titanium white, 3-10% porcelain clay, 50-70% high molecular polymer, 1.5-5% nanometer emulsion, 0.0001-0.01% water-based color and water; putting one or two modify acroleic acid emulsion and acroleic acid emulsion into stirrer; emulsifying and stirring at 10-20 min; (2) grinding the active calcium carbonate, titanium white and porcelain clay to fine particle; mixing evenly to standby; getting mixture; (3) putting the mixture into stirrer with water as medium; mixing evenly; (4) filtering with filter; (5) injecting into toning autoclave; dipping color; stirring evenly; getting the product. This paint not only can be used to exterior wall and roofing or inner wall, but also can be used to metal, concrete or mortar, lumber and plastic.

Description

technical field [0001] The invention relates to a coating, in particular to an acrylic emulsion coating with decoration, heat insulation and waterproof functions and a preparation method thereof. Background technique [0002] Building energy consumption has accounted for about 33% of the total energy consumption in the country for developed countries in the world. Under the current situation of intensifying global energy crisis, such a huge proportion has already attracted the attention of foreign developed countries. As a developing country, my country's total building energy consumption has also increased year by year with the rapid growth of GDP, and is now close to the level of international developed countries. If we do not start to pay attention to building energy conservation now, it will directly aggravate the energy crisis. Therefore, Building energy conservation has become a major theme of sustainable development in my country and the world. The core of building en...

AI Technical Summary

Problems solved by technology

However, due to the principle of heat resistance and conduction of hollow microspheres, there are many microbead powders, thick coatings, low elongation, and low scrub resistance. Therefore, it is difficult to meet the standards of decorative coatings.

[0007] (2) Insulation: Insulation materials such as insulation mortar or plastic foam are mainly used; however, these insulation materials are expensive and may easily cause external walls to fall off, leak, crack, etc.

For example: (1) It is usually necessary to meet the stain resistance requirements of the synthetic resin exterior wall decorative coating standard <15% and the wash resistance ≥ 2000 times, which requires the surface of the coating film to be relatively hard and not soft, which makes it difficult to meet the requirements of polymerization. The elongation at break in the building waterproof coating standard should be greater than 300%

(2) The solar absorptivity of satellite thermal control coatings that meet the military industry standards should be less than 20%, and the infrared radiation rate should be greater than 80%. Powder fillers with excellent thermal conductivity and reflectivity must be added, which will lead to coating The film cannot meet the standard of tensile strength greater than 1.5MPa or elongation at break greater than 300% required by waterproof coatings; (3) decorative coatings require multi-color choices, which will also affect the solar absorption rate of satellite thermal control coatings The index is less than 20%, because the addition of pigments will greatly increase the solar absorption rate; (4) To make the coating meet the heat insulation standard, it is necessary to add a lot of powder and pigment, so that the coating film cannot reach 0.3MPa and 0.5h. It cannot meet the requirements of impermeability standards, nor can it meet the artificial weathering resistance and pulverization indicators of decorative coatings.

This is why there is no coating that meets the technical requirements of national or industry standards for decoration, heat insulation, and waterproofing at the same time.

[0009] At present, the ordinary decorative coatings for exterior walls have the following disadvantages: ① poor durability, easy to age and peel off; ② low color retention rate; ③ low elongation and elasticity, and the coating will crack if the exterior wall cracks; ④ stain resistance Poor performance, sticky dust, old and dirty color; ⑤ Poor fire resistance of coatings

However, due to the low solid content and high water content of the existing commercially available acrylic exterior wall latex paint, shrinkage will occur after drying (generally 30% to 35%), causing cracks or cracks

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