Low-temperature quick-drying type polyurethane acrylate coating and preparation method thereof

Abstract

The invention discloses a low-temperature quick-drying type polyurethane acrylate coating. The coating consists of a component A and a component B by a mass ratio of 100 to (20-27), wherein the component A comprises the following components in percentage by mass: 20-45 percent of hydroxyl acrylic resin, 4-7 percent of amino resin, 2-12 percent of modified polyaspartic acid ester, 4-10 percent of a pigment, 8-20 percent of filler, 0.1-2 percent of a dispersant, 0.1-2 percent of a defoaming agent, 0.1-2 percent of a flatting agent, 0.1-2 percent of a silane coupling agent, 0.1-2 percent of a PH regulating agent and 15-25 percent of a mixed solvent; the component B is isophorone diisocyanate. The coating disclosed by the invention has the characteristics of being rapid, cured at low temperature, excellent in physical and mechanical properties and the like, is excellent in adhesive force to various base materials (iron, aluminum alloy, zinc plated plates, stainless steel and the like), and can be widely applicable to industrial coating of costly furniture, steel structures, railway locomotives and the like. The invention also discloses a preparation method of the low-temperature quick-drying type polyurethane acrylate coating.

Description

technical field

[0001] The invention belongs to the technical field of coatings, and in particular relates to a low-temperature quick-drying acrylic polyurethane coating and a preparation method thereof. Background technique

[0002] Coatings have been widely used in various industries due to their decorative and protective functions. Although most of the coatings currently on the market have excellent performance, they have certain requirements for the coating ambient temperature. When the ambient temperature is lower than 5°C, it is very difficult to cross-link and cure the coating film. The surface drying time of most coatings is generally about It takes 12 hours, and the hard drying time is about 18 hours. Even if it exceeds 24 hours, it is difficult to reach 50% of the crosslinking degree of the dried paint film, and the paint film is prone to bubbles, easy to be polluted, and the adhesion is reduced. Affect the construction progress, construction quality and coating e...

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