Abstract: The present invention pertains to a process for forming a coating on a substrate using a tribo-charging electrostatic fluidized bed process; characterized in that a powder coating is used which has a particle size distribution such that a) d(v,90)?42.5 ?m, and b) i) the percentage of particles <10 ?m in size is ?12% by volume, and/or ii) [d(s,90)÷d(s,10)]2?3.5, [d(s,90)?7]d(s,90) being greater than 7 ?m and d(s,90) and d(s,10) being measured in microns.

Abstract: The present invention pertains to a powder coating material comprising particles having a particle size distribution which satisfies the following equation: [d(s,90)/d(s,10)]2÷[d(s,90)?7]?3.5 and in which d(s,90) is greater than 7 ?m, d(s,90) and d(s,10) being measured in microns. The powder coatings can be obtained via a grinding-classification process or an agglomeration process. In a preferred embodiment the particles are prepared by a process which comprises mechanical fusion of a powder coating material, wherein the powder is brought to a maximum temperature in the range of from the Tg of the powder to 15° C. above the Tg, at a heating rate for at least the last 3° C., preferably at least the last 4° C., up to the maximum temperature of no more than 4° C. per minute, and after a period in the range of from 0 to 40 minutes at the maximum temperature the powder is cooled.

Abstract: The present invention pertains to a process for forming a coating on a substrate using a tribo-charging electrostatic fluidised bed process; characterised in that a powder coating is used which has a particle size distribution such that a) d(v,90)?42.5 ?m, and b) i) the percentage of particles <10 ?m in size is ?12% by volume, and/or ii) [d(s,90)÷d(s,10)]2?3.5, [d(s,90)?7] d(s,90) being greater than 7 ?m and d(s,90) and d(s,10) being measured in microns.

Abstract: The invention provides a powder coating composition in which the powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles.

Abstract: The invention provides a powder coating composition in which powder particles are an agglomerate of individual particulate components fused or bonded together into composite particles. Maximizing the amount of larger-sized uncolored component(s) gives cost advantages, and the invention allows a rapid and flexible manufacture of a range of colored powder coating compositions.

Abstract: A powder coating composition, suitable for providing a coating having certain appearance or performance attributes, which includes composite particles that are agglomerates of individual particulate components fused or bonded together into composite particles such that the composite particles are air-fluidizable and can be applied to a substrate by electrostatic spray without causing the individual particles in the composite particles to break down under the mechanical and/or electrostatic forces associated with their application to a substrate.