High-antistatic polyether ketone ketone electrostatic spraying powder paint as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of paint, and particularly relates to high-antistatic polyether ketone ketone electrostatic spraying powder paint as well as a preparation method and application thereof. The high-antistatic polyether ketone ketone electrostatic spraying powder paint is prepared from polyether ketone ketone resin and conductive fillers coated with acrylic resin at the surface according to the mass ratio of (90 to 99.5):(10 to 0.5); the melt index of the polyether ketone ketone resin is 20 to 80g/10min; the test conditions are as follows: the temperature is 380 DEG C, and the load is 2.16kg; the powder grain diameter D50 of the polyether ketone ketone resin is 30 to 120mu m. The high-antistatic powder paint provided by the invention has better flowability; duringthe antistatic spray coating, the construction is simple; the conductive fillers in a formed coating are uniformly dispersed in the resin; the electric conductivity of the prepared electrostatic spraying coating is improved. The invention also provides the preparation method and application of the high-antistatic polyether ketone ketone electrostatic spraying powder paint.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a high antistatic polyether ketone ketone electrostatic spraying powder coating, its preparation method and application. Background technique [0002] Polyether ketone ketone (PEKK) is a special engineering plastic with excellent performance, which has excellent wear resistance, mechanical properties, chemical corrosion resistance, high temperature resistance and other properties. At present, it has been widely used in aerospace, electronic communication, petrochemical, and medical and health fields. Polyether ketone ketone belongs to thermoplastic resin. As a coating material, it has good adhesion to the substrate and good wear resistance. It is one of the ideal polymers used as the coating matrix material. At present, there are industrialized polyether ketone ketone electrostatic spray powders used in automotive and industrial parts, household cooking utensils and...

AI Technical Summary

Problems solved by technology

But at the same time, electrostatic powder spraying technology cannot spray powder with good conductivity. When polyether ketone ketone is simply mixed with carbon nanotubes or graphene and then sprayed, the polyether ketone ketone powder will be electrostatically charged through the electrostatic spray gun. Evenly adsorbed on the surface of the workpiece, but the carbon nanotube or graphene powder itself conducts electricity, and its powder cannot be charged under the action of static electricity after passing through the electrostatic spray gun, so it is difficult to evenly adsorb on the surface of the workpiece, resulting in cracking in the coating Uneven distribution of conductive fillers in polyetherketoneketone coatings

In addition, since graphene as a conductive filler has a lamellar structure, while carbon nanotubes have a long rod structure, when added to polyether ketone ketone, it will greatly reduce the fluidity of the electrostatic spray powder, resulting in problems when spraying with an electrostatic spray gun. Phenomena such as poor powder or spit powder

Therefore, when polyether ketone ketone is simply mixed with carbon nanotubes or graphene and then sprayed, the polyether ketone ketone antistatic powder coating for electrostatic spraying cannot be prepared.

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