UV-cured self-repairing antistatic coating

Abstract

The invention provides UV curing self-repairing antistatic coating. The coating comprises, by mass, 40 to 55 parts of UV curing self-repairing resin, 2 to 10 parts of a photoinitiator, 30 to 50 partsof antistatic resin, 5 to 30 parts of a photopolymerization monomer, 0.1 to 1 part of a leveling aid and 0.1 to 5 parts of an antistatic aid. The antistatic resin adopted is modified polythiophene, has good intermiscibility with each component in the system, is stable in storage, and can form a cross-linked structure with other photopolymerization components during curing; a coating layer has highlight transmittance and lasting and stable antistatic effect; and because of the addition of the self-repairing resin, the prepared coating has excellent sharp article scratch resistance. The coatingcan be used for surface coating of optical devices, sensitive electronic components and functional films.

Description

technical field [0001] The invention relates to the field of ultraviolet curing coatings, in particular to a UV curing self-repairing antistatic coating. [0002] technical background [0003] Coatings can be seen everywhere in people's lives, including mobile phones, computers, cars, houses, etc., all need to use coatings, and coatings have a protective and decorative effect. UV-curable coating is a kind of high-efficiency, energy-saving, and environmental-friendly coating, which is used in various aspects such as wood, plastic, glass, and metal. Materials used for optical instruments, electronic product components or functional protective films of electronic appliances, etc. Static electricity may cause damage to sensitive electronic components, and it is easy to accumulate dust. Coating a layer of UV antistatic coating on the surface of these materials can It eliminates static electricity very well, and can also improve its wear-resistant and anti-scratch functions withou...

AI Technical Summary

Problems solved by technology

However, the existing UV-curable coatings generally do not have antistatic properties themselves, and antistatic components need to be added to make them have antistatic functions.

[0004] One of the commonly used methods for existing UV antistatic coatings is to add conductive fillers such as graphite, carbon nanotubes, nano-metals and their oxides to UV coatings. The conductive fillers can be evenly dispersed in the paint film to obtain antistatic The electrostatic effect is stable and long-lasting, but the addition of conductive fillers will affect the transparency and color of the coating; one is to add ionic antistatic resins or antistatic agents such as acrylate modified quaternary ammonium salts, quaternary phosphonium salts, alkyl Sulfonate, alkyl phosphate, etc., this method is to use the hydrophilic group of antistatic resin or antistatic agent to absorb water molecules in the air on the surface of the paint film to form a layer of water film to make the surface of the paint film antistatic, but Quaternary ammonium salts and quaternary phosphorus salts have poor heat resistance and water resistance, and the antistatic effect of UV antistatic coatings made of ionic antistatic substances is greatly affected by ambient humidity and temperature. Abrasion and washing in water will also lead to an increase in surface resistance; patent CN 104356927 A obtains a UV curable coating with better antistatic performance by using a quaternary ammonium salt that can participate in photocuring acrylate, and can resist ethanol wiping, but it is not resistant to it. Research on water washing and wear resistance

[0005] High molecular polymers with conductive functions, such as polyaniline and polythiophene, have stable chemical properties. They are added to UV coatings as film-forming substances or antistatic agents. They have excellent antistatic effects and are not affected by temperature and humidity, but non-reactive polymers Thiophene or polyaniline polymer molecules cannot form a cross-linked network structure, and many of its resistances such as wear resistance, solvent resistance, water resistance, and durability are not as good as reactive types (heat curing, light curing, etc.)

Patent CN 104263229 A mentions a method of dispersing polythiophene polymers into UV coatings. The prepared paint film initially has good antistatic performance, but its antistatic effect cannot be kept stable for a long time; patent CN 107418422 A It is mentioned that polythiophene is added to the UV coating system, and the antistatic MS board prepared by it has good antistatic performance and scrub resistance, but its solvent resistance and resistance to scratching by sharp and hard objects cannot meet the actual requirements

In short, the existing method of making UV coatings antistatic by adding polythiophene, although the initial antistatic performance is excellent, but the stability and durability are average; although the obtained product has high hardness and wear resistance, it still cannot achieve Resistant to scratches by sharp objects without scratches, and poor flexibility, easy to crack when bent, only suitable for hard substrates, not suitable for soft films

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