Self-cleaning light-curing anti-fog coating and preparation method thereof

Abstract

The invention provides a self-cleaning photocuring antifogging paint which is prepared from the following raw materials in parts by mass: 3-8 parts of modified graphene nano particle, 20-80 parts of hydrophilic photosensitive resin, 5-20 parts of photoinitiator, 15-40 parts of diluter and 1-3 parts of curing accelerator. The invention also provides a preparation method of the self-cleaning photocuring antifogging paint. Compared with correlation techniques, the method provided by the invention has the following advantages: the graphene surface is subjected to hydrophilc modification to endow the graphene with favorable hydrophilicity and dispersity, and the graphene has favorable compatibility with the photosensitive resin, thereby greatly enhancing the strength wear resistance of the coating; the cation organic monomer modified hydrophilic resin can effectively inhibit the bacteria on the coating surface from generation, and has favorable self-cleaning property; the cured paint forms a crosslinked network, so that the adhesion, hardness, frictional resistance, water resistance and other mechanical properties are enhanced, and the cured paint can resist fog for a long time; and the paint is baked at low temperature, and is applicable to various substrates.

Description

【Technical field】 [0001] The invention relates to the technical field of coatings, in particular to a self-cleaning light-curing anti-fog coating and a preparation method thereof. 【Background technique】 [0002] The existing anti-fog coatings make the coating hydrophilic by introducing hydrophilic functional groups, so that the contact of fog droplets on the coating surface is low, and spread into a uniform water film to prevent light scattering, so as to achieve the purpose of anti-fog. The patent with the publication number CN104725640A discloses a hydrophilic modified silica sol and its application in the preparation of hydrophilic anti-fog and wear-resistant coatings. The PEG-modified silane coupling agent and ethyl orthosilicate are hydrolyzed to prepare hydrophilic Modified silica sol, adding this silica sol to the anti-fog coating, the prepared anti-fog coating has good wear resistance and adhesion, but the compatibility between silica sol and polyethylene glycol is p...

AI Technical Summary

Problems solved by technology

The patent with the publication number CN104725640A discloses a hydrophilic modified silica sol and its application in the preparation of hydrophilic anti-fog and wear-resistant coatings. The PEG-modified silane coupling agent and ethyl orthosilicate are hydrolyzed to prepare hydrophilic Modified silica sol, adding this silica sol to the anti-fog coating, the prepared anti-fog coating has good wear resistance and adhesion, but the compatibility between silica sol and polyethylene glycol is poor, resulting in poor transmittance of the coating Low-level problems; the patent with the publication number CN105038430A discloses a super-hydrophilic anti-fog coating, which is composed of modified acrylic emulsion, nano-silica, titanium dioxide and surfactants, adding nano-silica to significantly improve the coating. The adhesion of the layer to the substrate and the strength of the coating can improve the long-lasting anti-fog effect, but the long-chain hydrophobic groups of the surfactant are easy to aggregate and separate from the hydrophilic components. After absorbing moisture, a color film is formed on the surface, which affects the optical properties. The introduction of white powder will affect the transparency of the coating; the publication number is CN102850924A, which discloses a long-lasting anti-fog coating, which is prepared from a modified hydrophilic resin, a blocked isocyanate curing agent and a modified surfactant. The blocked isocyanate curing agent must be unblocked and heat-cured above 120°C, which requires high temperature resistance for transparent substrates, and its application is limited

The disadvantage of the existing technology is that it is difficult for the existing system to take into account the comprehensive performance of adhesion, surface hardness, wear resistance, water resistance and long-lasting anti-fog performance, and sacrifice some performance to improve other performance

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