Abstract: A powder coating composition comprising an intimate mixture of: (a) at least one film forming NIR radiation curable resin; (b) 1.0 to 20.0 wt. %, based on total weight of the powder coating composition, of at least one NIR reflecting pigment; and (c) at least one curing agent in an effective amount to cure said powder coating composition; wherein components (a), (b) and (c) are not reacted prior to being mixed together and whereby the powder coating composition is cured by NIR radiation.

Abstract: The invention relates to a process of preparation of powder coating compositions providing a desired gloss level of the resulted coatings comprising the following steps of a) providing particles of at least one powder coating composition having a number average particle size in the range of 1 to 300 ?m, and b) mixing these particles with particles of at least one powder coating composition having a number average particle size in the range of 1 to 300 ?m, the particles of which are irradiated with high energy radiation under near-ambient temperature, in a mixing ratio of 1:99 to 99:1; the process according to the invention provides powder coating compositions producing a desired gloss level of the coatings by varying the time period and/or the intensity of the high energy irradiation of the powder coating particles or by varying the mixing ratio between the non-irradiated powder particles and the irradiated powder particles.

Abstract: The present invention is directed to a process for coating a surface of a substrate with a powder coating composition and forming a smooth film thereon; wherein the process comprises: applying a powder coating composition to a surface of a substrate; melting and curing the powder coating composition, wherein pulsed NIR radiation is used to perform said melting and curing of the powder coating composition, the NIR radiation being provided by an NIR radiation emitter and the pulsed NIR radiation comprising the steps of: a) applying heat by NIR radiation at 20-50% NIR radiation emitter power to the surface of the substrate coated with the powder coating composition for a sufficient time to at least partially adhere the powder coating to the surface of the substrate; and then b) removing the heat for a period of time to allow the powder coating to at least partially coalesce and adhere to the surface of the substrate; and then c) applying said heat by NIR radiation at 80-100% NIR radiation emitter power to the su

Abstract: A powder coating composition comprising an intimate mixture of: (a) at least one film forming NIR radiation curable resin; (b) 1.0 to 20.0 wt. %, based on total weight of the powder coating composition, of at least one NIR reflecting pigment; and (c) at least one curing agent in an effective amount to cure said powder coating composition; wherein components (a), (b) and (c) are not reacted prior to being mixed together and whereby the powder coating composition is cured by NIR radiation.

Abstract: The present invention is directed to a powder coating composition that produces a low gloss coating upon cure. The powder coating composition includes one or more crosslinkable base polymer, a crosslinkable acrylic polymer and one or more free radical initiators. By adding spheroidal particles to the powder coating composition further reduction in gloss can be obtained while improving smoothness. These compositions are well suited to produce coatings on metallic substrates, such as automotive bodies and non-metallic substrates, such as reconstituted wood substrates, used for desk or table tops.

Abstract: The present invention is directed to a powder coating composition that produces a low gloss coating upon cure. The powder coating composition includes one or more crosslinkable base polymer, a crosslinkable acrylic polymer and one or more free radical initiators. By adding spheroidal particles to the powder coating composition further reduction in gloss can be obtained while improving smoothness. These compositions are well suited to produce coatings on metallic substrates, such as automotive bodies and non-metallic substrates, such as reconstituted wood substrates, used for desk or table tops.