powder composition, process for the preparation of a tungsten bronze and alkali metal or composition of tungsten bronze and alkali metal, particle dispersion, composition, use of tungsten bronze and alkali metal particles or particles containing a tungsten bronze and alkali metal, and method for increasing the amount of heat input from near infrared radiation in a solid or liquid material

摘要

The invention relates to a powder composition comprising particles of a) an alkali metal tungsten bronze, b) tungsten oxide, and c) tungsten metal, a method for the preparation of said powder composition, and to the use of said powder composition in form of a dispersion in a polymer material or article for heat shielding, or to increase the heat-input amount of near infrared radiation in processes selected from laser welding of plastics, NIR curing of coatings, drying of printing inks, fixing of ink toners to a substrate, heating of plastic performs, laser marking of plastics or paper.