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.

In one instance a semicrystalline polyketone powder useful for additive manufacturing is comprised of a bimodal melt peak determined by an initial differential scanning calorimetry (DSC) scan at 20° C./min and a D.sub.90 particle size of at most 300 micrometers and average particle size of 1 micrometer to 150 micrometers equivalent spherical diameter. In another instance, A composition is comprised of a semicrystalline polyketone powder having a melt peak and a recrystallization peak, wherein the melt peak and recrystallization peak fail to overlap.

The present invention is directed to dirt and anti-microbial resistant articles that include a substrate, a powder coating applied to the substrate, the powder coating may include a cross-linked polymeric binder. The powder coating may include a blend of metal borate and a sulfur-containing benzimidazole compound, wherein the metal borate and sulfur-containing benzimidazole compound are present in a weight ratio ranging from about 75:1 to about 10:1. The powder coating may include fluorosurfactant and a fluorosurfactant may be applied to the powder coating in an amount ranging from about 0.01 g/m.sup.2 to about 4 g/m.sup.2. The powder coating may be formed using a liquid-based fluorosurfactant.

The present invention is directed to dirt and anti-microbial resistant compositions and articles that include a powder coating composition formed from a precursor including polymeric binder resin, cross-linker, and a blend of liquid carrier and anionic fluorosurfactant. The powder coating may be formed using a liquid-based anionic fluorosurfactant wherein the solids content of the anionic fluorosurfactant within the precursor is from about 13 wt. % to about 28 wt. %.

A toner comprising a toner particle and an external additive, wherein the external additive comprises a composite particle comprising an organosilicon polymer fine particle covering a surface of an alumina particle, a coverage ratio of the surface of the alumina particle with the organosilicon polymer fine particle is 1 to 50 area %, and given A (nm) as a number-average particle diameter of primary particles of the organosilicon polymer fine particle and B (nm) as a number-average particle diameter of primary particles of the alumina particle, following formulae (I) and (II) are satisfied:
A≤90  (I)
100≤B≤1000  (II).

A branched carboxylic acid functional polyester resin P is described herein along with thermosetting powder coating compositions (PCC A) comprising a binder K, the binder K comprising the polyester resin P and a crosslinker X. The invention further relates to a cured PCC A. In addition, processes for making said PCC A and processes for coating an article with said PCC A are described as well as articles having coated thereon the PCC A and an articles having coated and cured thereon the PCC A.

The invention relates to a branched carboxylic acid functional polyester resin P as described herein. The invention further relates to a thermosetting powder coating composition (PCC A) comprising a binder K, said binder K comprising the P and a crosslinker X. The invention further relates to a cured PCC A. The invention further relates to a process for making said PCC A and processes for coating an article with said PCC A. The invention further relates to an article having coated thereon said PCC A as well as to an article having coated and cured thereon said PCC A. The invention further relates to a thermosetting powder coating composition B (PCC B) comprising a physical mixture of the thermosetting powder coating composition A (PCC A) with a separate, distinct thermosetting powder coating composition A1 (PCC A1). The invention further relates to a process for making said thermosetting powder coating composition B and processes for coating an article with said PCC B. The invention further relates to a cured PCC B. The invention further relates to an article having coated thereon said thermosetting powder coating composition B as well as to an article having coated and cured thereon said thermosetting powder coating composition B. The invention further relates to use of: the polyester resin P, the PCC A, the cured PCC A, the PCC B, the cured PCC B, articles coated with the PCC A, articles coated with the PCC B, articles having coated and cured thereon the PCC A, articles having coated and cured thereon the PCC B. The invention further relates to the use of the polyester resin P for matt powder coatings. The invention further relates to the use of the PCC B for matt powder coatings.

Polymers are provided which are formed of at least one unit selected from the group consisting of the following units S1 and S2:

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wherein X and Y are substituents as defined in the specification and k and m are integers as defined in the specification.

A mar and scratch resistant additive that possesses multifunctional and other characteristics is described. The additive comprises a binder system platform that is easily introduced into a wide range of chemical coating platforms. The additive may also be introduced to these coatings by way of a silica carrier to simplify its use.

A powder coating composition includes: a film-forming resin; a lignin polymer that is substantially free of sulfonate or sulfonic acid groups; and a crosslinker reactive with functional groups of the film-forming resin and the lignin polymer. The lignin polymer includes at least 5 weight % of the powder coating composition, based on the total solids weight of the powder coating composition. Further, when cured to form a coating, the film-forming resin and lignin polymer react and chemically bond with the crosslinker to form a binder of the coating.