VESTOSINT® stands for high-performance powders manufactured by a special physical process and features a nearly round geometry. Therefore, they are eminently suited particularly for coatings.
Evonik manufactures laurolactam, the monomer of polyamide 12 (PA 12), derived from butadiene. Polyamide 12 has the lowest amide group concentration of all commercially available polyamides, allowing for lower moisture absorption and maintenance of mechanical stability while under conditions of changing humidity.
Properties of VESTOSINT® Polyamide 12 Powders
The coating powder manufactured from the base polymers with technically challenging processes affords other physical, chemical and electrical properties that make it perfect for a broad spectrum of applications:
- high mechanical strength, elasticity and surface hardness
- low water absorption and water vapor permeability
- high resistance even in warm and detergent-containing water
- low thermal conductivity
- good electrical insulation and dielectric strength
- easy to clean
- no surface fouling
VESTOSINT® maintains these properties even at extreme sub-freezing temperatures. VESTOSINT® coated objects are not only protected from abrasion, scratching and impact abuse but also, from chemicals and corrosion. The protective action increases pro- portionally to the layer thickness, up to 500 microns.
Fluidized Bed Coating Process
The fluidized bed coating powder has a particle size distribution ranging from 30 to 250 microns and is adjusted so as not to produce dust. Metal substrates of any geometry constructed of steel, metal alloys or aluminum can be coated. To do this, dip the pieces in fluidized VESTOSINT® powder. The powder sinters to the surface of the substrate and fuses into a smooth surface thanks to its residual heat. Depending on the desired coating thickness, the pieces are heated to 230 - 450 °C and dipped for 2 - 10 seconds. The process operates without solvent. Materials that change their shape, lose their properties or generate gases during the above described procedure cannot be coated.
Further Processing Methods for VESTOSINT® Powders
Product Story
