The present disclosure describes a low gloss polyurethane one component powder coating composition comprising 90 to 100 wt % of a resin system comprising a thermosetting resin, an isocyanate curing agent for reacting with the thermosetting resin, and a polycarbonate diol, wherein: the thermosetting resin comprises a first hydroxyl functional polyester resin (i) having a hydroxyl value of between 200 and 250 mgKOH/g and a second hydroxyl functional polyester resin (ii) having a hydroxyl value of between 20 and 40 mgKOH/g, the weight ratio of (i):(ii) ranges from 15:85 to 35:65, the isocyanate curing agent comprises at least one unblocked uretdione curing agent, the ratio of isocyanate groups of the curing agent to hydroxyl group of the thermosetting ranges between 0.8 to 1.2, and the total weight % of the polycarbonate diol in the coating composition ranges from 1 to 10 wt % based on the total weight of the coating composition.

A process and system for rapidly fabricating small batches of powder coating compositions having desired colors from one or more solid input filaments. An additive manufacturing filament fabricator feeds one or more single-color solid polymer input filaments into a heated mixer in accordance with an input formulation to be liquefied and mixed to produce a homogenous extrudate mixture. The extrudate mixture is solidified on an extrudate receiving platform and is then comminuted by an extrudate mill into a finished powder coating composition having a desired color.

Frits or frit mixtures with pearlescent pigments for materials, such as ceramic glazes, which are stable above 1000 C.

A powder coating material includes powder particles and an external additive including inorganic particles having an average primary particle diameter of 1000 nm or less. The ratio of the carbon content (mass %) in the inorganic particles to the average primary particle diameter (nm) of the inorganic particles is 0.1 or more. The powder coating material includes a black colorant or a white colorant or does not include any colorant.

Powder coatings and compositions thereof, and methods for coating an article are provided. In one example, a composition for a powder coating includes a binder including a binder resin portion and a binder curing portion. The binder resin portion includes a first epoxy resin having an epoxide equivalent weight of from about 500 to about 560 g/eq. A second epoxy resin has an epoxide equivalent weight of from about 1600 to about 1950 g/eq. A third epoxy resin has an epoxide equivalent weight of from about 850 to about 1050 g/eq.

Powder coatings and compositions thereof, and methods for coating an article are provided. In one example, a composition for a powder coating includes a binder including a binder resin portion and a binder curing portion. The binder resin portion includes a first epoxy resin having an epoxide equivalent weight of from about 400 to about 450 g/eq. A second epoxy resin has an epoxide equivalent weight of from about 1600 to about 1950 g/eq. A third epoxy resin has an epoxide equivalent weight of from about 850 to about 1050 g/eq.

A representative sample of a primer and topcoat formulation (as shown in Table 5, for example) were each examined to compare their rheological behavior, with a blend of the topcoat and primer formulation (85% topcoat, 15% primer) used for comparison. The time and temperature dependence of the viscosity was measured on a strain-controlled rheometer using parallel plate geometry in dynamic mode, with an applied strain of 1% and 1 Hz frequency of oscillation. The data is represented as complex viscosity (Pa-s). For the primer and topcoat formulations, sample discs were prepared by compressing 0.3 g of the powder composition in a 13-mm plug mold at 1000 ram force for 15 seconds. Pressing was done at room temperature to avoid premature curing of the powder. The rheometer was set at 70? C. for sample loading. The gap was then set to 0.05 mm below the thickness of the pressed pellet to ensure contact with parallel plates. The temperature of the sample and fixtures were equilibrated for 10 minutes before measurements were taken. The sample temperature was ramped at 5? C./min from 70? C. to 245? C. to examine the rheological behavior as a function of temperature. The resultant curve of complex viscosity versus temperature and is examined to compare the flow behavior of the powder compositions.

Coated substrates and methods may comprise multiple components forming a coating composition. Each component may independently comprise a film forming resin, a crosslinker, a catalyst, and/or a matting agent. The multi-component coating composition may cure at low temperatures and may alter the gloss value of the cured coating.

A pigmented pulverulent composition based on polyamide for coating substrates, including: (a) 40% to 99% by weight of at least one polyamide, (b) 1% to 30% by weight of at least one pigment, and (c) 0% to 30% by weight of at least one additive, wherein the polyamide has an inherent viscosity, as measured using an Ubbelohde tube at 20? C. on a 0.5% by weight solution in m-cresol according to standard ISO 307 but with a measuring temperature of 20? C. rather than 25? C., of more than 0.7 (g/100 g)?1, and wherein the composition has a volume-median diameter Dv50, as measured according to standard ISO 9276parts 1 to 6, of 10 to 200 ?m. A process for manufacturing the composition, the use thereof for coating ametallicsubstrate, and an object comprising a metallic substrate coated with a coating obtained with the pigmented pulverulent composition based on polyamide.

An object of the present invention is to provide a powder coating material capable of forming a coating film excellent in weather resistance, whereby formation of color unevenness or pinholes is suppressed. Further, another object of the present invention is to provide a method for producing the powder coating material and a coated article. The powder coating material of the present invention comprises a powder component containing a fluorinated copolymer which has repeating units based on a fluoroolefin and repeating units based on a monomer having no fluorine atom and which has a fluorine content of at least 10 mass %, and a plasticizer-covered luster pigment, wherein the plasticizer has a melting point of from 30 to 200 C. and a molecular weight of from 200 to 1,000 and which has from 1 to 4 ester groups in one molecule.