Polyurethane-based transparent antifouling coating preparation method

Abstract

The invention discloses a polyurethane-based transparent antifouling coating preparation method, which comprises: chemically modifying by using a natural polymer with hydroxyl as a raw material to prepare an acylated natural polymer compound; and carrying out a cross-linking reaction by using part of the residual hydroxyl groups of the acylation product as polyol, using a polyisocyanate compound as a cross-linking agent and using a small amount of hydroxyl-terminated polysiloxane as a functional component to prepare the polyurethane-based transparent antifouling coating with the light transmittance (T) of more than 95% and the thickness of 30-40 [mu]m. According to the invention, the prepared coating has advantages of high transparency, thermal stability, corrosion resistance, degradability, high surface hardness and other excellent performances; with the application of the coating in marking inks, paints and other liquid pollutants, the coating is extremely easily shrink, no mark leaves after repeated wiping, and the good antifouling property is achieved; the coating has the low sliding angle in most of test solutions; and the functional surface can be prepared on various surfacesof wood, metal, cotton fiber and the like, and has wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of antifouling surface materials, in particular to a method for preparing a polyurethane-based transparent antifouling coating. Background technique [0002] "Smart" surfaces, such as self-cleaning windows, oil-resistant dining tables, stain-resistant car windshields and mirrors, graffiti-blocking walls, and other antifouling coatings that repel water and oil-borne contaminants, aid in cleaning and Beautify our world. At present, there are three main methods to construct the antifouling surface and endow the material with excellent amphiphobic properties: 1) forming a rough surface with micro-nano structure through various processing methods, and performing hydrophobic modification on the surface; 2) constructing a porous layer, Then, a liquid with low surface energy is poured into it to form a liquid-infused porous surface; 3) the surface is grafted and modified with a polymer with low surfa...

AI Technical Summary

Problems solved by technology

Although the above surface treatment methods can achieve the anti-fouling performance of the material surface, the preparation process is relatively cumbersome, and most of the systems use fluorine-containing substances or polymers, so the cost is high; and it is often based on the premise of sacrificing the light transmittance of the material ; In addition, the poor durability of the anti-fouling property due to the easy wear and tear of the surface greatly limits the anti-fouling surface from the laboratory to people's daily life.