Abstract: Wood is electrostatically coated with a thermosetting powder coating system in which a mixture of a self-curing epoxy resin and a catalyst therefore is extruded and a low temperature curing agent are both pulverized and the powders are blended with conventional additives to make a coating powder which is deposited on a wooden substrate and heated to cure. The mixture of resin and catalyst does not cure within the extruder but it is made to cure at low temperatures by the separate addition of the curing agent. A small amount of the low temperature curing agent, insufficient to cause substantial curing during extrusion may be used in place of the catalyst.

Abstract: An electrical chargeable dielectric coating powder and a triboelectric coating process for applying the powder to substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (My) of between 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of:95%-100% smaller than 88 microns,5%-15% smaller than 15.56 microns and0%-6% smaller than 11 microns.Preferably the coating powder has 0% larger than 88 microns and an Mv=about 30-40, preferably 35-40 microns. More preferably the particle distribution further includes10%-15% smaller than 15.56 microns and4%-6% smaller than 11 microns, andan Mv of between about 35 and 36 microns. Most preferably the particle distribution further includes:about 11.5% smaller than 15.56 microns andabout 4.3% smaller than 11 microns, andan Mv of about 35.9. Preferably the powder is a thermosetting resin composition.

Abstract: The use of cyclamic acid as a catalyst for the curing of hydroxyl-functional resins having a functionality greater than 2 provides a wrinkle finish. The hydroxy-function may be present in polyesters, epoxies, and acrylate or methacrylate resins, among others. The polyester resins which are able to provide such a finish have a hot plate melt flow of from about 20 mm to about 150 mm.

Abstract: A triboelectric coating process for applying powder to substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (Mv) of between about 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of:0-5% larger than 88 microns,85-95% larger than 15.56 microns and94-100% larger than 11 microns.

Abstract: The use of cyclamic acid as a catalyst for the curing of hydroxyl-functional resins having a functionality greater than 2 provides a wrinkle finish. The hydroxy-function may be present in polyesters, epoxies, and acrylate or methacrylate resins, among others. The polyester resins which are able to provide such a finish have a hot plate melt flow of from about 20 mm to about 150 mm.

Abstract: Significant improvements in the coating characteristics of electrostatic fluidized beds are obtained by limiting the weight of the fines in the coating powder to certain maximum levels, e.g., no more than 10% by weight of minus 38 micrometer particles. The improvements include faster build rates, higher deposition weights, and deeper penetration into holes, slots or other cavities of the substrate.

Abstract: A series of water soluble azo dyes for dyeing polyamide fiber material are provided by coupling an appropriate diazotized aminobenzene into an appropriately substituted N-alkyl-N-benzoxyethylarylamine. The dyes are characterized by the presence of one sulfonic acid group, either as the free acid or in salt form, and by the presence of a benzoate ester group. When dyed from an appropriate dye bath, these dyes produce dyeings on polyamide fiber material characterized by outstanding lightfastness and excellent transfer properties.