Water-based alkyd amino high blackness and high gloss intermediate paint and preparation method thereof

Abstract

The invention discloses a water-based alkyd amino high blackness and high gloss intermediate paint and a preparation method thereof. The intermediate paint comprises the following raw materials in percentage by weight: water-based alkyd resin 50-70%, dispersant 0.5-2%, defoam agent 0.2-0.5%, carbon black 1-3%, wetting agent 0.1-0.3%, level agent 0.1-0.4%, amino resin 10-16%, pH regulator 1.5-3.5%,cosolvent 3-5%, deionize water 10-20%. 30% of that water-based alkyd resin in the formula is taken, slowly added into a paint mix tank, pH adjustment is added according to 5% of the mass fraction ofthe added water-based alkyd resin under the stirring state of 300r / min, and the mixture is dispersed for 10-15min, 3% of cosolvent and 8% of deionized water are added under the stirring state of 300r / min, and and the mixture is dispersed for 10-15 min, then dispersant is added and a part of defoam agent is added, the stirring speed is increased slowly to 500r / min, and the stirring lasts for 30min. The coating is a single-component coating, and after coating, it is dried through 120-140 DEG C baking at medium and low temperature for about 60 minutes, finally a crosslinked network structure isformed, which is more than double the efficiency of solvent-based coatings currently used.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based alkyd amino high-blackness and high-gloss intermediate paint and a preparation method thereof. Background technique [0002] In the process of sewing machine production, it is necessary to coat the surface of the sewing machine with anti-corrosion paint and other coatings. In the construction process, it is necessary to use intermediate paint. At present, most anti-rust intermediate paints are epoxy mica iron intermediate paint, and epoxy mica iron intermediate paint is gray Mica iron oxide is used as pigment, epoxy resin is used as base material, and polyamide resin is used as curing agent to form a two-pack cold-curing epoxy coating, mainly composed of epoxy resin, mica iron oxide, antirust pigment, organic solvent and curing agent Formulated to provide good adhesion, flexibility, abrasion resistance and sealing properties. However, the existing intermediate pai...

AI Technical Summary

Problems solved by technology

However, the existing intermediate paint is cumbersome to use, seriously pollutes the environment, and the surface brightness and blackness are poor. Later, it is changed to a solvent-based alkyd amino baking varnish, which can effectively improve the surface brightness, fullness, blackness, etc., but the content of organic volatiles is high. , there is a large amount of benzene series, which will cause great harm to the environment and workers. Therefore, it is necessary to improve the existing intermediate paint for sewing machines. Water-based is an inevitable choice because of its greenness and environmental protection;