Water-based inorganic zinc-rich coating easy to construct as well as preparation method and application of water-based inorganic zinc-rich coating

Abstract

The invention belongs to the technical field of zinc-rich paint, and discloses water-based inorganic zinc-rich paint easy to construct as well as a preparation method and application of the water-based inorganic zinc-rich paint. The water-based inorganic zinc-rich coating easy to construct comprises a component A and a component B, the component A is prepared from the following components in parts by weight: 10 to 25 parts of potassium silicate resin, 1 to 10 parts of organic silicon resin emulsion, 0.5 to 1.5 parts of anti-settling agent a, 0.5 to 1.5 parts of anti-settling agent b, 0.1 to 10 parts of anti-settling aid, 0.1 to 1 part of defoaming agent, 0 to 10 parts of deionized water, 1 to 3 parts of zinc powder corrosion inhibitor, 0.3 to 3 parts of multifunctional flash rust agent and 0.1 to 10 parts of flatting agent; and the component B comprises 55-75 parts of zinc powder and 0-5 parts of an anti-rust pigment. The water-based inorganic zinc-rich coating solves the problem of poor constructability of the existing water-based inorganic zinc-rich primer, and improves the leveling property of a paint film, the settleability of zinc powder and the cracking and pulverization resistance of the paint film.

Description

technical field [0001] The invention relates to the technical field of zinc-rich coatings, in particular to an easy-to-construct water-based inorganic zinc-rich coating and a preparation method and application thereof. Background technique [0002] Water-based inorganic zinc-rich primers are widely used in heavy-duty anti-corrosion fields, such as bridges, port machinery, petrochemicals, etc., due to their excellent environmental protection, safety and anti-corrosion properties. However, in recent years, the promotion and application of water-based inorganic zinc-rich primers have been greatly restricted. This is mainly due to the poor workability of water-based inorganic zinc-rich primers, which is mainly reflected in poor sag resistance, insufficient leveling, paint The film is easy to powder and fall off and the zinc powder is easy to settle. Due to the low resin content and the high content of high-density powder (zinc powder) in the water-based inorganic zinc-rich prim...

AI Technical Summary

Problems solved by technology

However, in recent years, the promotion and application of water-based inorganic zinc-rich primers have been greatly restricted. This is mainly due to the poor workability of water-based inorganic zinc-rich primers. The film is easy to pulverize and fall off, and the zinc powder is easy to settle, etc.

Due to the low resin content and large content of high-density powder (zinc powder) in the water-based inorganic zinc-rich primer, the powder is easily settled after adding the resin, which makes the paint liquid layered and poor in workability. At the same time, it has leveling and anti-sag The effect is poor; in addition, due to the fast drying speed of the inorganic resin, poor leveling is prone to occur during the drying process, especially when the dry film thickness is greater than 60 μm, the paint film is easy to pulverize and crack.

[0003] At present, in the existing technology, the problem of poor anti-sagging is mostly solved by controlling the proportion of anti-settling agent in the powder. For example: Chinese invention patent CN 106752156B makes the film thickness of one-time wet film reach 250 μm, which effectively improves the water resistance. The anti-sagging performance of inorganic zinc-rich coatings, however, the water-based inorganic zinc-rich coatings have poor water resistance, which will affect the initial water resistance of the paint film and limit its application range

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