Magnetic polyethylene powder coating containing maleic anhydride grafted activated nano calcium carbonate and preparation method of polyethylene powder coating

Abstract

The invention relates to a polyethylene powder coating and particularly relates to a magnetic polyethylene powder coating containing maleic anhydride grafted activated nano calcium carbonate and a preparation method of the polyethylene powder coating. The powder coating is prepared from the following raw materials in parts by weight: 6-10 parts of nano calcium carbonate, 2-3 parts of an aluminate coupling agent DL-411, 5-8 parts of diethylene glycol dibenzoate, 2-3 parts of polyethylene glycol, 12-16 parts of a polyurethane thermal elastomer, 2-3 parts of maleic anhydride, 1-2 parts of diethyl isopropyl benzene peroxide, 1-2 parts of nano spherical ferroferric oxide magnetic powder, 5-6 parts of pigments, 2-3 parts of an antioxidant and 40-50 parts of polyethylene. According to the coating prepared by the invention, nano calcium carbonate is activated by oxygen, and maleic anhydride is grafted on the surface of nano calcium carbonate, so that the binding force and compatibility of the raw materials and high molecular materials are improved; the doped nano spherical ferroferric oxide magnetic powder endows the material with uniform magnetism. The coating shows good flowability and adhesiveness, the strength and toughness of the sprayed coating are improved, and the coating is smooth and fine in surface, heat-resistant and stable, and has certain magnetism. The product is environmental-friendly and efficient and is excellent in coating effect.

Description

technical field [0001] The invention relates to a polyethylene powder coating, in particular to a magnetic polyethylene powder coating containing maleic anhydride grafted activated nano-calcium carbonate and a preparation method thereof. Background technique [0002] Polyethylene powder coatings occupy a large proportion in the existing thermoplastic powder coatings. Its advantages are mainly manifested in cheap raw materials, chemical corrosion resistance, good electrical insulation and low temperature stability. However, its disadvantages are also obvious. Use When the mechanical strength is poor, the adhesion of the coating film is poor, the surface is easy to crack, and the anti-corrosion and weather resistance also need to be improved. Performance is imperative. [0003] At present, the ways to improve the performance of polyethylene are mainly divided into two methods: physical modification and chemical modification. Although these modification methods are currently w...

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Problems solved by technology

[0002] Polyethylene powder coatings occupy a large proportion in the existing thermoplastic powder coatings. Its advantages are mainly manifested in cheap raw materials, chemical corrosion resistance, good electrical insulation and low temperature stability. However, its disadvantages are also obvious. Use When the mechanical strength is poor, the adhesion of the coating film is poor, the surface is easy to crack, and the anti-corrosion and weather resistance also need to be improved. performance imperative

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