Functional liquid coating used for magnesium aluminium alloy base material

Abstract

The present invention relates to a functional liquid paint used in magnesium backer. It consists of base body and face budge. They all includes special property modification alkyd resin liquid paint, which has good interlamellar clunging, good gloss and color retention, high abrasive resistance, salt spray resistance, and cold and heat resistance. It needs only one set of production equipment, so the cost is largely reduced. The baking temperature of base bedye is reduced from 200Deg.c in present technique to 140Deg.c-160Deg.c; the energy cost is largely reduced. The thickness covered of base bedye is reduced from 50-80 micro in present technique to 25-30 micro, the cost of paint is reduced and when repaint the whole membrane changes little, which is good for the latter equipment.

Description

technical field [0001] The invention relates to a liquid coating, in particular to a functional liquid coating for magnesium-aluminum alloy substrates. Background technique [0002] At present, domestic coatings for magnesium-aluminum alloy substrates (such as mobile phone and laptop casings) rely on imports. Powder coatings are used for primers and liquid coatings are used for topcoats. Therefore, the coating equipment is not uniform, and two sets of equipment are required for production. The investment is large, and the powder coating of the primer needs to be baked at a temperature above 200°C, which consumes a lot of energy. The film thickness of the primer coating is about 50-80 microns, and the film thickness is 100-150 microns when recoating. The thickness is extremely uneven, which is not conducive to subsequent assembly. In view of the high standard requirements for coatings on loose and porous magnesium-aluminum alloys, the liquid coatings in the prior art cannot ...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic coatings for magnesium-aluminum alloy substrates (such as mobile phone and laptop casings) rely on imports. Powder coatings are used for primers and liquid coatings are used for topcoats. Therefore, the coating equipment is not uniform, and two sets of equipment are required for production. The investment is large, and the powder coating of the primer needs to be baked at a temperature above 200°C, which consumes a lot of energy

The film thickness of the primer coating is about 50-80 microns, and the film thickness is 100-150 microns when recoating. The thickness is extremely uneven, which is not conducive to subsequent assembly

In view of the high standard requirements for coatings on loose and porous magnesium-aluminum alloys, the liquid coatings in the prior art cannot take into account the high adhesion, high wear resistance, salt spray resistance, and thermal cycle resistance of such products.

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