The invention relates to a hydroxyl-functional polyester containing a perfluoropolyether block prepared by a method comprising the following steps: a) subjecting a carboxyl-terminated perfluoropolyether C to a reaction with an epoxy-functional compound D, and b) subjecting the reaction product of step a) to a reaction with a lactone E. The polyester thus prepared can be used in a coating composition, comprising further (b) an OH-functional or epoxy-functional resin, and (c) a hardener comprising groups reactive to the OH or epoxy-functional groups of resin (b).

The invention relates to a hydroxyl-functional polyester containing a perfluoropolyether block prepared by a method comprising the following steps: a) subjecting a carboxyl-terminated perfluoropolyether C to a reaction with an epoxy-functional compound D, and b) subjecting the reaction product of step a) to a reaction with a lactone E. The polyester thus prepared can be used in a coating composition, comprising further (b) an OH-functional or epoxy-functional resin, and (c) a hardener comprising groups reactive to the OH or epoxy-functional groups of resin (b).

An objective of the present invention is to provide a production method that enables PHA (e.g. PHA powder) to be produced with high productivity. The above is achieved by providing: a method for producing a polyhydroxyalkanoate, including the steps of (a) preparing an aqueous suspension that contains a polyhydroxyalkanoate and an alkylene oxide-based dispersing agent and has a pH of not more than 7 and (b) spray-drying the aqueous suspension prepared in the step (a); and the like.

The invention relates to a polymer comprising certain specific units. The invention further relates to processes for making the polymer of the invention. The invention further relates to a binder and compositions comprising the polymer, preferably to compositions suitable for paints and coatings. The invention relates in particular to water-borne, solvent-borne and powder coating compositions and preferably to curable water-borne, curable solvent-borne and curable powder coating compositions. The invention further relates to cured compositions. The invention further relates to objects, in particular coatings prepared from the compositions of the invention. The invention further relates to processes for making the compositions of the invention. The invention further relates to articles having coated thereon the compositions of the invention. The invention further relates to articles having coated and cured thereon the compositions of the invention. The invention further relates to various uses of the polymer of the invention, the binder of the invention, the composition of the invention, the cured composition of the invention and various uses of articles having coated and optionally cured thereon the compositions of the invention.

The invention relates to a polymer comprising certain specific units. The invention further relates to processes for making the polymer of the invention. The invention further relates to a binder and compositions comprising the polymer, preferably to compositions suitable for paints and coatings. The invention relates in particular to water-borne, solvent-borne and powder coating compositions and preferably to curable water-borne, curable solvent-borne and curable powder coating compositions. The invention further relates to cured compositions. The invention further relates to objects, in particular coatings prepared from the compositions of the invention. The invention further relates to processes for making the compositions of the invention. The invention further relates to articles having coated thereon the compositions of the invention. The invention further relates to articles having coated and cured thereon the compositions of the invention. The invention further relates to various uses of the polymer of the invention, the binder of the invention, the composition of the invention, the cured composition of the invention and various uses of articles having coated and optionally cured thereon the compositions of the invention.

Disclosed are processes for making polymeric composite materials and composite materials made from those processes the process comprising: providing a mixture, comprising: a liquid, a polymer precursor, and a dispersed-phase precursor; and subjecting the mixture to reaction conditions sufficient: to effect polymerization of the polymer precursor to produce a polymer and a reaction product; and to remove substantially all the liquid and reaction product from the mixture; wherein said reaction conditions comprise: pressure between about 10 millitorr and about 300 torr; and temperature: greater than or equal to the highest boiling point of the liquid and reaction product; less than the decomposition temperature of the polymer; and less than the decomposition temperature of the dispersed-phase precursor.

Disclosed are processes for making polymeric composite materials and composite materials made from those processes the process comprising: providing a mixture, comprising: a liquid, a polymer precursor, and a dispersed-phase precursor; and subjecting the mixture to reaction conditions sufficient: to effect polymerization of the polymer precursor to produce a polymer and a reaction product; and to remove substantially all the liquid and reaction product from the mixture; wherein said reaction conditions comprise: pressure between about 10 millitorr and about 300 torr; and temperature: greater than or equal to the highest boiling point of the liquid and reaction product; less than the decomposition temperature of the polymer; and less than the decomposition temperature of the dispersed-phase precursor.

Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component present therein. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles located in a polymer matrix comprising a first polymer material and a sacrificial material that are immiscible with each other. The sacrificial material, which may comprise a second polymer material, may be removable from the first polymer material under specified conditions. The piezoelectric particles may remain substantially non-agglomerated when combined with the polymer matrix. The polymer matrix may be treated to remove the sacrificial material to introduce a plurality of pores. The compositions may have a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes may comprise forming a printed part by depositing the compositions layer-by-layer.

This disclosure describes a composition that includes a bulk diffuser that includes a film having a major surface; the film includes a polymer, and a scattering element. The scattering element includes a silicone bead having a mean particle diameter in a range of 2 micrometers (μm) to 9 μm. The linear density of the film is at least 5.1 W.sub.i*μm, wherein the linear density equals the product of the mass fraction of the silicone bead (W.sub.i) and film thickness in micrometers (μm). This disclosure further describes methods of making the film and the bulk diffuser and methods of using the film including, for example, as a bulk diffuser in a sign box.

This disclosure describes a composition that includes a bulk diffuser that includes a film having a major surface; the film includes a polymer, and a scattering element. The scattering element includes a silicone bead having a mean particle diameter in a range of 2 micrometers (μm) to 9 μm. The linear density of the film is at least 5.1 W.sub.i*μm, wherein the linear density equals the product of the mass fraction of the silicone bead (W.sub.i) and film thickness in micrometers (μm). This disclosure further describes methods of making the film and the bulk diffuser and methods of using the film including, for example, as a bulk diffuser in a sign box.