Flame-retardant film coating and preparation method thereof

Abstract

The invention discloses a flame-retardant film coating. The flame-retardant film coating is prepared from the following raw materials in parts by weight: 0.3 to 1 part of diphenylmethane diisocyanate, 4 to 5 parts of ammonium bicarbonate, 1 to 1.5 parts of vanadium sulfate hydrate, 6 to 7 parts of sodium tungstate dehydrate, 20 to 30 parts of silane coupling agent KH570, 5 to 7 parts of methyl triethoxysilane, 60 to 70 parts of 2 to 3 percent ammonia-water solution, 1 to 1.4 parts of ammonia propyl triethoxy silane, 2 to 3 parts of hydrous zinc borate, 1 to 2 parts of benzyl triphenyl phosphonium chloride, 0.8 to 2 parts of palm wax, 0.1 to 0.2 part of symclosene, 0.8 to 1 part of sodium alkyl benzene sulfonate and 0.3 to 1 part of dimethylethanolamine. According to the flame-retardant film coating disclosed by the invention, the silane coupling agent KH570 is adopted for performing modifying treatment; silane coupling agent KH570 modules are grafted to tungsten-doped vanadium dioxide powder particles, so that the hydrophobicity of modified particles is effectively improved, and further the surface strength of the coating is improved.

Description

technical field [0001] The invention relates to the technical field of thin-film coatings, in particular to a flame-retardant thin-film coating and a preparation method thereof. Background technique [0002] Inorganic nanoparticles can play the role of mechanical reinforcement or endow coatings with new functions in coatings, and have attracted extensive attention. The dispersion of nanoparticles is particularly important for the realization of their functions, especially the preparation of highly transparent organic-inorganic nanocomposite coatings. [0003] Vanadium dioxide has great application prospects in intelligent thermal insulation and energy-saving coatings, but due to the limitation of its preparation method and process, as well as the strong absorption of vanadium dioxide metal phase and semiconductor phase in the short-wave range, vanadium dioxide thin films usually have The low optical transparency greatly limits its practical applications. Therefore, the ant...

AI Technical Summary

Problems solved by technology

[0003] Vanadium dioxide has great application prospects in intelligent thermal insulation and energy-saving coatings, but due to the limitation of its preparation method and process, as well as the strong absorption of vanadium dioxide metal phase and semiconductor phase in the short-wave range, vanadium dioxide thin films usually have Low optical transparency, which greatly limits its practical application

Although many preparation methods of vanadium dioxide and doped vanadium dioxide powders and films have been reported, there is still a long way to go before its practical application.

First of all, commonly used preparation techniques such as magnetron sputtering, vapor deposition and other equipment are expensive and costly, and it is difficult to achieve large-area coating; secondly, due to their own limitations, the prepared vanadium dioxide or vanadium dioxide (W) The transparency of the film in the visible light region is poor, and there is basically no possibility of practical application

Although many attempts have been made in anti-reflection, such as doping and coating anti-reflection film, the improvement of transparency is still relatively limited; again, the existing reports are basically focused on vanadium dioxide or vanadium dioxide (W) Preparation of pure membranes with little foray into organic coating routes to produce vanadium dioxide thermochromic coatings

Fourth, there are few reports on the stability of vanadium dioxide powder or film (including composite film)

In the above process, the compatibility between the nanoparticles and the dispersion medium and the compatibility between the nanoparticles and the organic resin may cause conflicts. If the grafted organic molecules are not compatible with the resin, the resin will be cured. During the drying process, phase separation between the nanoparticles and the organic phase may occur, resulting in a decrease in the transparency of the nanocomposite coating