A powder coating material for fluidized-bed coating has a volume average particle diameter D50v of 5 μm or more and 20 μm or less. The powder coating material shows an aerated flowability energy AE of 5 mJ or higher and lower than 100 mJ as measured with a powder rheometer using a vessel having a cross-sectional area with Ø50 mm under conditions of a rotary blade tip speed of 100 mm/sec, a rotary blade helix angle of −5°, and an air flow rate of 20 ml/min.

To provide powder for thermal spraying, a method of thermal spraying, and a thermally sprayed coating, which can efficiently work supplying of a dry state powder by using a powder supplying apparatus with a thermal spraying apparatus, and which prevent variation and pulsation or lowering of supplied amount of powder and achieve a required film forming rate, and can obtain a denser coating on the surface of the substrate to be thermally sprayed. [Solution] Powder for thermal spraying 1 is a powder mixture obtained by mixing ceramic powder A whose particle diameter is D.sub.1 and ceramic powder B whose particle diameter is D.sub.2, wherein D.sub.1 is 0.5 to 12μπ.Math. as a median diameter, D.sub.2 is 0.003 to 0.100μ.Math.η as an average particle diameter converted from the BET specific surface area, and when, in the powder mixture, the total weight of the ceramic powder A to be used whose prescribed particle diameter D.sub.1 is W.sub.1, and the total weight of the ceramic powder B to be added to the ceramic powder A is W2, an addition ratio Y of the ceramic powder B defined by Y=W.sub.2/(W.sub.1+W.sub.2) satisfies: Y≥0.2066×D.sub.1.sup.−0.751 and Y≤0.505×D.sub.1.sup.−0.163.

Described herein is a powder coating that includes a plurality of particles. The plurality of particles includes amorphous polyester and iron oxide pigment, wherein the plurality of particles have a size of from 5 microns to 250 microns, and wherein the plurality of particles each have a circularity of from about 0.93 to about 0.999. A method of manufacturing the particles is also disclosed.

An antibacterial coated product includes, on a base material, a coating film of an antibacterial coating material that contains at least composite ceramic powders containing a photocatalytic component, adsorbent component, and metal component, and a binder, wherein the antibacterial activity (JIS Z 2801:2010) of the coating film is 2.0 or higher and the requirement(s) of (1) and/or (2) below is/are satisfied: (1) with respect to the composite ceramic powder in the antibacterial coating material, the volume average dispersed particle diameter (D.sub.50) is 250 nm or smaller, and the ratio of the 90% cumulative volume particle diameter (D.sub.90) and the volume average dispersed particle diameter (D.sub.50), or D.sub.90/D.sub.50, is 1.5 or lower; and (2) the thickness of the coating film is 80 μm or smaller and the haze (JIS K 7136:2000) of the antibacterial coated product or coating film is 25 or lower.

Ways of preparing a partially crystalline polycarbonate powder are provided that include dissolving an amorphous polycarbonate in a polar aprotic solvent to form a first solution of solubilized polycarbonate at a first temperature. The first solution is then cooled to a second temperature, the second temperature being lower than the first temperature, where a portion of the solubilized polycarbonate precipitates from the first solution to form a second solution including the partially crystalline polycarbonate powder. Certain partially crystalline polycarbonate powders resulting from such methods are particularly useful in additive manufacturing processes, including powder bed fusion processes.

Powder coating compositions, particularly metal packaging powder coating compositions, coated metal substrates, and methods; wherein the powder coating compositions include powder polymer particles comprising a polymer having a number average molecular weight of at least 2000 Daltons, wherein the powder polymer particles have a particle size distribution having a D50 of less than 25 microns; and, in certain embodiments, one or more charge control agents in contact with the powder polymer particles.

Useful thermoplastic polymer powders are formed by a method comprising: cooling a foam comprised of a thermoplastic foam below the brittleness temperature of the thermoplastic polymer, wherein the foam has an average strut dimension of 10 to 500 micrometers, and comminuting the cooled foam to form a thermoplastic polymer powder. The method allows for the efficient grinding of the thermoplastic polymer having improved morphology and desirable characteristics such as dry flow without flow aids.

The invention consists of a multi-functional hardness composition that also serves as a mar/scratch resistant additive and flow modifier. The multifunctional hardness composition itself is a mixture of polyester resin, acrylic resin, curative, degassing agent, flow modifier and glass flakes. The multifunctional hardness composition may be introduced to finished coating compositions by way of a silica carrier.

A multi-functional dispersant that also serves as a flow modifier and rheology modifier is contemplated. The dispersant itself is a mixture, extruded in the presence of water so as to impart moisture to that extrudate, which is formed from polyester resin, curatives, anti-corrosion pigments, UV absorbers, catalysts, flow modifiers, degassers, anti-oxidants and glass flakes. After grinding and optional mixing with a silica carrier, the resulting dispersant may be introduced to solid and liquid (by way of water) finished coating compositions in order to improve various properties of the coating.

This invention provides a groundbreaking approach to PLNPs and their preparation. In particular, the synthetic methodology disclosed herein fundamentally differs from the traditional solid-state annealing reactions that require extreme and harsh reaction conditions. In one unique aspect of the invention, a simple, one-step mesoporous template method utilizing mesoporous silica nanoparticles (MSNs) is disclosed that affords in vivo rechargeable NIR-emitting mesoporous PLNPs with uniform size and morphology. In another unique aspect of the invention, the novel synthetic approach is based on aqueous-phase chemical reactions conducted in mild conditions, resulting in uniform and homogeneous PLNPs with desired size control (e.g., sub-10 nm).