Transparent priming paint for construction and preparation method thereof

Abstract

The invention provides a transparent priming paint for construction and a preparation method thereof. The transparent priming paint for the construction is prepared from the following components in mass percent: 50 percent to 60 percent of cationic emulsion, 1 percent to 1.5 percent of an organic silicon accelerant, 0.2 percent to 0.3 percent of a sterilizing agent, 3 percent to 3.5 percent of a film forming auxiliary agent, 1 percent to 1.2 percent of an anti-freezing agent, 0.2 percent to 0.4 percent of a thickening agent and 33 percent to 44.6 percent of water, wherein the organic silicon accelerant is a surface active auxiliary agent with a molecular structural formula shown by the description and capable of reducing the surface tension of the system. The transparent priming paint for the construction, provided by the invention, has excellent permeability and film forming performance, excellent waterproof and alkali-resisting performances, simple and easy construction performance, high adhesion property and broad-spectrum substrate adaptive performance.

Description

technical field [0001] The invention relates to the field of building materials, more specifically, to a transparent primer for building and a preparation method thereof. Background technique [0002] Generally speaking, the primer is an important part of the exterior wall coating system, and the performance of the primer has a decisive impact on the final performance of the coating film. Generally, a high-performance primer should meet the following performance requirements: convenient construction, environmental friendliness, resistance to external rainwater intrusion into the substrate, high hydrophobicity, and does not affect the breathing function of the substrate, strengthening the substrate, and improving the resistance of the topcoat. Substrate adhesion. [0003] The primer generally exerts its bonding force with the substrate and its sealability through penetration and riveting of the substrate, which can improve the adhesion strength of the substrate and the upper...

AI Technical Summary

Problems solved by technology

However, due to the high surface tension of the existing water-based emulsions, poor penetration often occurs, resulting in insufficient bonding between the primer and the substrate, and poor sealing performance.

[0004] In addition, the base material is usually required to be treated or maintained before the coating is applied, but the conventional use of chlorine-based emulsions tends to make the primer film brittle and hard, so it needs to be modified with a polymer emulsion with good alkali resistance; while chlorine Although there are successful examples of partial emulsions, chlorine partial emulsions are prone to yellowing; when other polymer emulsions are used as primer materials, cement-based substrates are required to undergo 1-2 months of maintenance, which greatly prolongs the project cycle. In short-cycle engineering applications, the coating will be discolored due to the application of the coating when the wall substrate is not dry, such as fading, yellowing, and whitening.

[0005] Therefore, existing substrate sealing primers are difficult to meet the above requirements

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