Water-based baking varnish and preparation method thereof

Abstract

The invention relates to the technical field of the baking varnish, in particular to a water-based baking varnish and a preparation method thereof. The water-based baking varnish comprises the following raw materials by weight percent: 40-60% of acrylic resin, 11-17% of amino resin, 6-10% of ethanol, 3-7% of normal butanol, 2-5% of neutralizer, 0.1-0.4% of flatting agent, 0.1-0.3% of defoaming agent, 15-25% of water and 1-2.5% of adhesive agent. The water-based baking varnish of the invention contains no pollutant and harmful material such as benzene and aldehyde, has low VOC, uses water as diluent instead of organic solvent, and is non-toxic, odourless and environmentally friendly, thus improving the working environment of constructors and protecting the health condition of constructors; acrylic resin using edible ethanol as additive is selected to be the main base stock so that in processing process, the baking varnish has the functions of sterilization and disinfection; and the adhesive force of the baking varnish of the invention can reach 2-3h, no unusual change appears on the baking varnish in the water after 72h and the baking varnish has the advantages of strong adhesive force and good water resistance.

Description

Technical field: [0001] The invention relates to the technical field of baking varnish, in particular to water-based baking varnish and a preparation method thereof. Background technique: [0002] Coatings that need to be baked and dried at a certain temperature to form a film are commonly known as baking varnishes. At present, traditional oil-based baking varnishes are basically used for baking varnishes on workpieces. Petroleum solvents such as benzene, ether, alcohol, etc. are used as solvents. Solvent-based coatings will have a large amount of volatile organic solvents VOC, which are discharged into the atmosphere during use, which not only damages the environment and endangers people's health, but also wastes resources and energy. Solvent-based coatings are generally applied by spraying or brushing. If dip coating is used, the bath solution is difficult to manage and the risk is high. Workers on site can easily inhale a large amount of volatile solvents and cause poison...

AI Technical Summary

Problems solved by technology

Solvent-based coatings will have a large amount of volatile organic solvents VOC, which are discharged into the atmosphere during use, which not only damages the environment and endangers people's health, but also wastes resources and energy

Solvent-based coatings generally adopt spraying and brushing construction methods. If dip coating is used, the bath solution is difficult to manage and the risk is high. Workers on site can easily inhale a large amount of volatile solvents and cause poisoning, etc.

At present, in bakelite products, glass, and metal products, in order to make the surface of the product beautiful, it will be sprayed with baked topcoat. Because the baked paint has the advantages of bright paint surface and smooth paint film, more and more Bake-drying paint is used for some products, but the drying-drying paint will produce toxic and harmful gases during spraying and baking, and the harmful and toxic gases are rich in benzene and heavy metal volatiles, which will seriously endanger people's health; and the existing The paint film of the bake-dried topcoat has weak adhesion and is easy to fall off