Nano coating and preparation method and application thereof

Abstract

The invention provides nano coating comprising nano dispersion liquid, light-cured resin and auxiliaries. The nano dispersion liquid at least comprises nano materials and dispersants, the dispersants account for 5-50% of the weight of the nano materials, and the light-cured resin accounts for 100-600% of the weight of the nano materials. The auxiliaries at least comprise photoinitiators, adhesion promoters, flatting agents, surface anti-wear agents and diluting solvent. The dispersants and the light-cured resin form ionic bond or covalent bond combination, and chemical bonds at least include ester bonds, urea bonds, carbon-carbon bonds, carbon-nitrogen bonds and chemical bonds having the structural characteristics of -o-, carbamic acid ester, acid amide, acid imide, oxazolidinone and the like, so that re-agglomeration of the nano materials in films can be avoided, and further stability and weather resistance of the nano functional films are improved, and the service life of the nano functional films is prolonged. The nano coating further has the advantages of high visible light transmittance, high infrared barrier rate and high ultraviolet absorption rate.

Description

technical field [0001] The invention relates to a nano-coating technology, in particular to a nano-coating suitable for a nano-sunshine film, a preparation method thereof, and an application thereof. Background technique [0002] Existing sunlight film technology includes vacuum metallization film such as aluminum film, magnetron sputtering multilayer metal film such as double silver film, multilayer polymer stretch film and nano film, etc. Among them, although vacuum metallized aluminum film has low investment cost, its high visible light reflectance will cause serious light pollution; although magnetron sputtering multilayer metal film and multilayer polymer stretched film have high visible light transmittance and high The advantages of infrared rejection rate, but its investment cost is relatively high, and the cost performance is low; the nano-sunshine film made of nano-coating can take into account both visible light transmittance and infrared rejection rate, and its in...

AI Technical Summary

Problems solved by technology

Although the nano-coatings disclosed in the above-mentioned patent documents generally have the advantages of better visible light transmittance and infrared cut-off rate, there are still deficiencies: (1) the preparation method is to first disperse the nano-materials in water or alcohols, etc. In the solvent, and then add water-based resin to make nano-coating, the nano-material and resin in the nano-coating are mainly combined by physical adsorption, the stability is poor, and it is easy to agglomerate over time, thus affecting the nano-coating. Infrared rejection rate of

(2) The hydrophilic solvent used has a high surface energy, which can easily cause insufficient wettability of the nano-coating on the surface of the coated substrate, resulting in uneven coating of the nano-coating

(3) Most of the nanomaterials used to prepare nanocoatings use a single ATO or ITO. Since different nanomaterials have different infrared absorption characteristics and different infrared absorption frequency bands, the use of a single nanomaterial limits the infrared blocking bandwidth of nanocoatings. , can not block infrared energy to the greatest extent

[0005] Although the Chinese patent document CN101108946 solves the stability problem of nano-coatings by in-situ polymerization, its processing procedures and processes are complicated, which is not conducive to large-scale production

However, it is difficult to achieve good dispersion, and the agglomeration phenomenon is difficult to solve, which in turn affects the infrared light blocking efficiency

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