Application of nano materials in powder coatings (1 of 2)

Powder coatings have bright color, convenient construction, low price, maintenance, color marks, beauty, decoration and other functions, and are widely used in daily life. However, with the development of international and marine development, aerospace, new energy and renewable energy, new materials based high-tech industries, traditional powder coatings are difficult to meet people's needs, so the development of functional powder coatings has been widely valued.

With its unique small standard effect, quantum effect and surface interface effect, nano materials have significantly advanced the physical and mechanical functions and anti-aging functions of powder coating, and even endowed the coating with special functions, such as wave absorption, antibacterial, conductive, scratch resistance, self-cleaning, etc. the application of nano materials in coating has promoted the functional development of powder coating.

Main characteristics of nano materials for powder coatings

(1) Optical properties

Nano materials have optical functions that large particles do not have, and some nano materials with particle size <100nm are sensitive to radioactivity α、γ Rays have the functions of absorption and scattering, which can advance the ability of the coating to prevent radiation, and can play the role of preventing radon in the coating of the inner wall. When nano particles are used in powder coatings to reach the nano level of looseness, they can also be used as excellent gloss coating due to their unique optical properties, which can greatly increase their functions of light retention, color retention and anti-aging.

(2) Surface activity

The particle size of nano materials is very small, which makes the number of surface atoms increase rapidly, and the surface area increases sharply, which determines that they have high surface activity. The increase of surface reaction active centers can advance its ability of chemical catalysis and photocatalytic reaction, and give the coating the ability of self-cleaning under the action of ultraviolet light and oxygen.

(3) Fill properties

The number of atoms on the surface of nano raw materials accounts for a large proportion, and there are no adjacent atoms around the surface atoms, which has unsaturated properties. When interacting with other components, a great force will be generated between the two mixed phases, which will greatly strengthen and toughen the material. The participation of nano materials will improve the volume filling density of pigments and fillers in the coating, reduce the capillary effect, and advance the shielding effect of the coating on corrosive media.

(4) Rheological properties

In order to advance the function of powder coating and eliminate the disadvantages of coating, rheological additives are generally involved. In the powder coating system, rheological additives have a common stable structure, which can maintain the loose pigment particles and form a thixotropic thick paste powder coating, which is conducive to sagging control, adhere to excellent leveling and avoid pigment sedimentation. In coating, due to the participation of nanoparticles, nanoparticles interact with some chain segments between them, which hinders the movement of this chain segment and advances the glass transition temperature of the film. Therefore, nano materials are an excellent rheological additives.

Application of nano materials in coating

(1) Nano material composite thermal insulation powder coating

Glass is widely used in buildings, transparent ceilings and car windows, and the heat radiation of sunlight will increase the energy consumption of air conditioning. Therefore, it is particularly important to reduce energy consumption by coating transparent thermal insulation powder paint on glass.

In the United States, a variety of semiconductor nano materials (ITO, ATO, ZnO, Al2O3, TiO2) are safely and loosely mixed in water or organic solvents to make a stable slurry, and then applied to resins to obtain functional nano powder coatings. Its coating has the functions of heat insulation, wear resistance, UV shielding and infrared insulation, and has been widely used in many fields.

Nanjing Powder New Material Co., Ltd. is specialized in producing various epoxy powder coating, epoxy polyester powder coating, polyester powder coating, flat powder coating, texture powder coating, functional powder coating, polyurethane powder coating, acrylic powder coating and other powder coating products.

Powder New strictly implements ISO9001, ROHS Pb-free test, SGS test report, certificate for safe transport, color fastness test and other Test reports and certificates of export related qualifications. Powder New offers a wide range of products to meet all of your order fulfillment needs.