Antifouling aid and application thereof in ultraviolet photocureable coatings

Abstract

The invention discloses an antifouling aid and application thereof in ultraviolet photocureable coatings; the antifouling aid is fluorine-silicon light-curable hyperbranched polyester with the following structure containing acrylate and maleic acid ester structures as shown in the specification, and under UV irradiation, double bonds of the acrylate and maleic acid ester of the structure of the antifouling aid can be crosslinked with double bonds of acrylic resin and acrylate monomers in coatings for curing to form coating layers with excellent hydrophobic and oleophobic performances, so that the excellent anti fouling effect can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of ultraviolet light curing antifouling materials, and specifically relates to a preparation method of a fluorosilicone photocurable hyperbranched polyester containing acrylate and maleate structures and its use as an antifouling adjuvant in ultraviolet curing coatings. application. Background technique [0002] Ultraviolet curing coatings (UV coatings) have been widely used in mobile phones, tablet computers, etc. due to their high efficiency, energy saving, environmental protection, and economic advantages, as well as their excellent scratch resistance, chemical resistance, and high gloss. The surface of the plastic substrate of electronic products such as optical lenses, machine control panels, GPS panels, etc. is hardened to improve the hardness, transparency, wear resistance, and impact resistance of the plastic substrate. However, during the use of these electronic products, fingerprints, skin oils, ink st...

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Problems solved by technology

However, fluorine-containing compounds have the disadvantage of high cost, so an organic silicon compound with low price and low surface energy is used to cooperate with fluorine-containing compounds to reduce surface tension, improve hydrophobic and oleophobic effect, and achieve anti-fouling function. is arousing people's general attention

[0004] Chinese patent CN103665022A discloses an antifouling additive of perfluoropolyether alkoxysilane, but the additive is synthesized using a two-step synthesis method. The first step uses flammable solvent ether, and expensive perfluoropolyether acyl Fluorine reacts with allylamine to obtain allyl perfluoropolyetheramide, and the synthesis time is relatively long, and the second step of reaction needs to be removed before the solvent is removed.

The second step reaction adopts dichloromethane, a relatively toxic low-boiling solvent, and requires a more expensive platinum catalyst. The above-mentioned product allyl perfluoropolyether amide is used to react with trimethoxysilane. The reaction time is long, and it needs to be removed. solvent

However, both fluorine-containing hyperbranched polymers and siloxane oligomers need to be prepared separately, while the former requires desolvation and vacuum drying steps, which is complicated to operate

Siloxane oligomers are prepared by hydrolysis of methacryloxypropyl triethoxysilane in ethanol solution under acidic conditions. Although the preparation process is simple, it is not easy to obtain oligomers with expected molecular weights. If Improper operation will cause crosslinking

In addition, the fluorine-containing hyperbranched polymer mentioned in this invention is only a multifunctional random binary copolymer with double bonds in the side chain, and its fluorine content is relatively low, because its fluorine raw material is only 2 -(perfluorohexyl) ethyl acrylate, the fluorine-containing chain segment is short, so the hydrophobic and oleophobic effect is low, and the polymer does not have the structural regularity of the hyperbranched polymer, so the viscosity is high, which will cause the coating The poor compatibility of other components in the system will affect the coating effect

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