Dispersion type waterborne epoxy zinc-alkene rusty, anti-rust and heavy anti-corrosion primer

Abstract

The invention discloses a dispersion type waterborne epoxy zinc-alkene rusty, anti-rust and heavy anti-corrosion primer. The dispersion type waterborne epoxy zinc-alkene rusty, anti-rust and heavy anti-corrosion primer is a waterborne heavy anti-corrosion primer composed of three components, wherein a component A is composed of waterborne epoxy dispersion, dispersant, defoamer, zinc oxide, rust converter, water dispersible graphene, graphene-specialized dispersant, flash rust inhibiting auxiliaries, waterborne rheological auxiliaries and water; a component B is zinc powder; a component C is composed of waterborne epoxy curing agent and water. The dispersion type waterborne epoxy zinc-alkene rusty, anti-rust and heavy anti-corrosion primer has no volatilization of organic solvent, and by taking water as dispersion medium, can convert rust on steel into stable substance, give play to anti-corrosion capability of the graphene, the zinc oxide and epoxy resin and provide continuous negativeelectrode protecting ability for the surface of base materials.

Description

technical field [0001] The invention relates to the field of water-based epoxy anti-corrosion coatings, in particular to a dispersion-type water-based epoxy zincene (three-component) anti-rust anti-rust heavy-duty anti-corrosion primer and its preparation method and application. Background technique [0002] 1. Before the traditional anti-corrosion coating is applied again, it is necessary to use sandblasting, manual or electric tools and other derusting methods to treat the surface of the steel surface. However, some large-scale steel equipment is difficult to derust completely or even cannot derust, which affects the protection of the paint film. Features. [0003] 2. Zinc-rich heavy-duty anti-corrosion primer is one of the most important and widely used heavy-duty anti-corrosion coatings for ships, marine facilities, bridges, large-scale equipment and various large-scale building steel structures. Its anti-corrosion mechanism is based on metal zinc powder For the cathodi...

AI Technical Summary

Problems solved by technology

[0002] 1. Before the traditional anti-corrosion coating is applied again, it is necessary to use sandblasting, manual or electric tools and other derusting methods to treat the surface of the steel surface. However, some large-scale steel equipment is difficult to derust completely or even cannot derust, which affects the protection of the paint film. Function

[0003] 2. Zinc-rich heavy-duty anti-corrosion primer is one of the most important and widely used heavy-duty anti-corrosion coatings for ships, marine facilities, bridges, large-scale equipment and various large-scale building steel structures. Its anti-corrosion mechanism is based on metal zinc powder For the cathodic protection of steel, the content of zinc powder is closely related to its anti-corrosion effect, but the high content of zinc powder (60% ~ 85%) also brings many disadvantages to the zinc-rich primer: 1) The use of a large amount of zinc powder, in Zinc oxide dust and zinc vapor generated during thermal processing such as welding and cutting will affect human health and easily lead to "zinc fever"; 2) High zinc powder content leads to poor compactness and low strength of the paint film The compatibility of paint is poor; 3) The density of epoxy zinc-rich primer is about 3.0 g / cm3, which is twice that of ordinary epoxy antirust primer, which does not meet the concept of weight reduction and consumption reduction of new marine coatings

[0004] 3. Although water-based inorganic zinc-rich products are environmentally friendly and have good anti-corrosion effects, they are highly brittle, consume a lot of resources, the construction conditions are relatively harsh, and the bonding strength is not high, so they are only suitable for the surface of metal materials

[0005] 4. Although the traditional epoxy zinc-rich primer has good anti-corrosion effect, it contains a large amount of organic solvents, which is not environmentally friendly

At the same time, there are many disadvantages brought about by the high zinc content.

[0006] 5. At present, the Chinese patent No. CN 103897556 A discloses a zinc olefin heavy-duty anti-corrosion coating and its preparation method. The coating belongs to a solvent-based heavy-duty anti-corrosion coating. Volatile solvent, not conducive to environmental protection