Salt and alkali flooding resistant solid color primer and preparation method thereof

Abstract

The invention provides salt and alkali flooding resistant solid color primer and a preparation method thereof. The salt and alkali flooding resistant solid color primer is prepared from 40 to 50 percent of nanometer stage epoxy acrylic acid emulsion and 0.3 to 0.8 percent of organic silicon auxiliary agents. The nanometer stage epoxy acrylic acid emulsion has the high salt and alkali flooding resistant performance, ,so that the solid color primer can achieve a good shielding effect on salt and alkali substances in fresh cement and mortar; the solid color primer can be constructed only when the pH value of a base layer is lower than or equal to 12 and the water content of the base layer is less than or equal to 30 percent; the salt and alkali flooding resistant performance of the solid color primer is influenced, so that the construction period is greatly shortened; the bonding force of a non-setting adhesive tape on the primer can be reduced by the organic silicon auxiliary agents; the condition of the paint film tearing of the solid color primer is reduced; the defects in the prior art are overcome.

Description

technical field [0001] The invention relates to the field of coatings, more specifically, to a solid-color anti-pan-saline primer and a preparation method thereof. Background technique [0002] In the construction process of the standard exterior wall coating system, the first step is the primer, the second step is the middle coat and top coat, and the third step is the finish varnish. With the improvement of the decorative performance of exterior wall coatings on the market, people are paying more and more attention to topcoats and finishing varnishes, while ignoring the important role played by primers in the entire coating. The topcoat and finish varnish in the exterior wall coating system not only have to withstand the test of wind, rain and sun exposure in the external natural environment, but also are eroded by a type of alkaline substance from the building base. The primer, as the first layer of the whole system, is in direct contact with the base layer, which improv...

AI Technical Summary

Problems solved by technology

Carbon dioxide dissolved in moist water can produce carbonic acid, which has a strong corrosion effect on steel bars, causing the strength of steel bars to drop sharply, and eventually loses its supporting effect on the entire building, bringing great hidden dangers to the building

Although the current exterior wall primers have a certain anti-salinity performance, it also requires a certain curing time for the base layer (generally, the pH value of the base layer is ≤10, and the moisture content of the base layer is ≤10%) before it can play a role after construction. , which creates a contradiction between the construction time and the pan-salinity of the grassroots

For example, CN201410747744.X patent discloses an environmentally friendly anti-alkali primer, which not only has high permeability, but also has high-efficiency antibacterial and anti-mildew properties, strong anti-alkali and purification properties, and also has low odor, strong anti-mildew and excellent anti-alkali properties. performance, but the disadvantage of this patented technology is that it needs to maintain the base for a certain period of time, and the construction can only be carried out when the pH value of the base is ≤ 10 and the moisture content of the base is ≤ 10%, which will lead to the extension of the construction period and increase the cost of all aspects

In addition, since most of the current projects are made of lines and masking paper, it often causes tearing of part of the primer

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