Water-based antistatic acrylic resin and preparation method thereof

Abstract

The invention provides a water-based antistatic acrylic resin and a preparation method thereof. The water-based antistatic acrylic resin comprises a water-based acrylic resin coating, a cross-linking curing agent and a composite ionic liquid antistatic agent, the weight ratio of the water-based acrylic resin coating to the cross-linking curing agent to the composite ionic liquid antistatic agent is 100: (0.5-2): (0.5-5), and the composite ionic liquid antistatic agent is prepared from 1-ethyl-3-methylimidazole ethylsulfate, trihydroxyethyl methyl ammonium methylsulfate and tri-n-butyl methyl ammonium bis(trifluoromethanesulfonyl)imine according to the weight ratio of (80-90): (5-15): 5. The antistatic agent provided by the invention is added into the water-based acrylic resin coating to prepare water-based antistatic acrylic resin, the water-based antistatic acrylic resin is coated on a PET base material, and the water-based antistatic acrylic resin has good antistatic performance and low film tearing voltage, and can protect a display screen when being used on the display screen of an electronic product; and the antistatic performance does not become worse along with the change of time and environment, and the water-based antistatic acrylic resin is not prone to being contaminated by dust, and has the permanent antistatic characteristic.

Description

technical field [0001] The invention relates to the field of coatings for protective films of electronic devices, in particular to a water-based antistatic acrylic resin and a preparation method thereof. Background technique [0002] Acrylic resin is used as an excellent polymer coating in various commercial fields such as automobiles, electrical appliances, and machinery. Among them, water-based acrylic coatings have become the main direction of the development of the coatings industry due to their advantages such as low price, safe use, resource saving, and environmental pollution reduction. The electronic field has been widely used. However, due to its superior electrical insulation, it has a high surface resistivity when used as a coating material (25 ° C, RH60%, resistivity 10 17 Ω). Therefore, once tribocharged, the static charge is not easy to be removed by the material itself but stays on the surface of the coating. The existence of these static electricity not o...

AI Technical Summary

Problems solved by technology

The protective film technology used on the surface of the touch screen is also improving simultaneously. The main requirement is that the protective film must have excellent antistatic properties. At present, the mainstream antistatic agents used at home and abroad are surfactants and polyacetylene, polyaniline, polythiophene The organic conductive polymers represented by ect., have poor performance under high temperature and low humidity conditions, and the indicators in many fields cannot meet the requirements.

[0004] For example, in the invention patent with publication number CN208562227U, the antistatic agent mainly used is conductive polyaniline filler with nano-core-shell structure. The problem of poor compatibility of acrylic resins leads to the failure of single-layer antistatic coatings to meet actual use requirements

[0005] In addition, in the invention patent with publication number CN111019550A, the antistatic coating used is mainly polythiophene and carbon nanotubes, among which polyacetylene, Antistatic agents such as polythiophene have poor compatibility with acrylic resins, so primers are usually used (that is, a layer of polythiophene antistatic layer is applied before acrylic resin, which needs to be coated twice) to achieve antistatic properties. The electrostatic effect increases the operation steps and complicates the production process. Solid fillers such as carbon nanotubes have obvious colors. Adding a small amount will also affect the product's light transmittance, transparency and other properties. There are some problems during use. limitation

[0006]Finally, in the invention patent with publication number CN110862782A, imine lithium salt is used as an antistatic agent to be added to acrylic resin, and also as a solid lithium imide The salt antistatic agent has the problem of poor compatibility with the acrylic polymer resin system. In addition, because its mechanism of action is to form a thin conductive water film on the surface of the antistatic coating to achieve the antistatic effect, it is subject to The impact of external environment changes (especially humidity changes) cannot achieve long-term permanent antistatic

[0007] And after the protective film made of water-based antistatic coating using these three technologies is pasted on the electronic display screen, the voltage generated when the film is torn is relatively high, and the tearing Excessive film voltage will break down the electronic components in the electronic display, resulting in the direct scrapping of the mobile phone screen, which has a great impact on the manufacture and use of electronic products

Images