In an aspect, a plurality of artificial melanin nanoparticles are provided, wherein: each melanin nanoparticle of the plurality of artificial melanin nanoparticles comprises a plurality of melanin oligomers; each melanin oligomer comprises a plurality of covalently-bonded melanin base units; and each melanin base unit comprises substituted or unsubstituted naphthalene. In an aspect, porous artificial melanin materials and methods of synthesizing porous artificial melanin materials are provided.

In an aspect, a plurality of artificial melanin nanoparticles are provided, wherein: each melanin nanoparticle of the plurality of artificial melanin nanoparticles comprises a plurality of melanin oligomers; each melanin oligomer comprises a plurality of covalently-bonded melanin base units; and each melanin base unit comprises substituted or unsubstituted naphthalene. In an aspect, porous artificial melanin materials and methods of synthesizing porous artificial melanin materials are provided.

A method of producing an extruded, powdered/granulated composition comprising an active pharmaceutical ingredient (API), by the steps of providing an API and a porous inorganic excipient, and processing them by an extrusion process to directly produce an extruded, powdered/granulated composition wherein the API is at least partially absorbed within the pores of the inorganic excipient. In preferred embodiments, the API is melted, or solubilised in a solubilizer.

A method of producing an extruded, powdered/granulated composition comprising an active pharmaceutical ingredient (API), by the steps of providing an API and a porous inorganic excipient, and processing them by an extrusion process to directly produce an extruded, powdered/granulated composition wherein the API is at least partially absorbed within the pores of the inorganic excipient. In preferred embodiments, the API is melted, or solubilised in a solubilizer.

Described herein are extrusion processes to produce hollow pellets. Also disclosed are pelletizer devices that can be used to produce the hollow pellets. The processes and devices make use of an extrusion die having a die orifice and an insert that is placed in the die orifice to produce the hollow pellets.

A method of producing thermoplastic particles may comprise: mixing a melt emulsion comprising (a) a continuous phase that comprises a carrier fluid having a polarity Hansen solubility parameter (dP) of about 7 MPa.sup.0.5 or less, (b) a dispersed phase that comprises a dispersing fluid having a dP of about 8 MPa.sup.0.5 or more, and (c) an inner phase that comprises a thermoplastic polyester at a temperature greater than a melting point or softening temperature of the thermoplastic polyester and at a shear rate sufficiently high to disperse the thermoplastic polyester in the dispersed phase; and cooling the melt emulsion to below the melting point or softening temperature of the thermoplastic polyester to form solidified particles comprising the thermoplastic polyester.

A method of producing thermoplastic particles may comprise: mixing a melt emulsion comprising (a) a continuous phase that comprises a carrier fluid having a polarity Hansen solubility parameter (dP) of about 7 MPa.sup.0.5 or less, (b) a dispersed phase that comprises a dispersing fluid having a dP of about 8 MPa.sup.0.5 or more, and (c) an inner phase that comprises a thermoplastic polyester at a temperature greater than a melting point or softening temperature of the thermoplastic polyester and at a shear rate sufficiently high to disperse the thermoplastic polyester in the dispersed phase; and cooling the melt emulsion to below the melting point or softening temperature of the thermoplastic polyester to form solidified particles comprising the thermoplastic polyester.

The invention relates to a method for producing powdery plastic particles having as spherical a structure as possible, wherein a starting product (30) made of plastic, in particular a viscous to solid starting product (30), is brought into contact with a smooth surface (24) of a body (20), which is moved at a speed v of at least 5 m/s relative to the starting product (30). In the contact area (34) between the starting product (30) and the body (20), the starting product (30) is heated locally, and is flung in powdery form out of the contact area in the direction of movement of the body (20).

A method of producing thermoplastic particles may comprise: mixing a melt emulsion comprising (a) a continuous phase that comprises a carrier fluid having a polarity Hansen solubility parameter (dP) of about 7 MPa.sup.0.5 or less, (b) a dispersed phase that comprises a dispersing fluid having a dP of about 8 MPa.sup.0.5 or more, and (c) an inner phase that comprises a thermoplastic polyester at a temperature greater than a melting point or softening temperature of the thermoplastic polyester and at a shear rate sufficiently high to disperse the thermoplastic polyester in the dispersed phase; and cooling the melt emulsion to below the melting point or softening temperature of the thermoplastic polyester to form solidified particles comprising the thermoplastic polyester.

The present invention relates to a new process for the preparation of microcapsules. Microcapsules obtainable by said process are also an object of the invention. Perfuming compositions and consumer products comprising said capsules, in particular perfumed consumer products in the form of home care or personal care products, are also part of the invention.