PROCESS FOR PRODUCING MICROPARTICLES LADEN WITH AN AROMA CHEMICAL

    公开(公告)号:US20230390167A1

    公开(公告)日:2023-12-07

    申请号:US18033087

    申请日:2021-10-29

    Applicant: BASF SE

    Abstract: The present invention relates to a process for producing polymer microparticles laden with at least one aroma chemical, which comprises i. dissolving the at least one aroma chemical and an organic polymer composition, which contains at least one polyester as a main constituent, in a volatile organic solvent having a boiling point lower than the boiling point of the aroma chemical and having a solubility in water of at most 100 g/L at 20° C. and 1013 mbar, whereby a solution of the aroma chemical and the organic polymer composition is obtained; ii. emulsifying the solution obtained in step i. in an aqueous medium containing at least one dispersant; iii. removing the volatile organic solvent from the emulsion by evaporation at a temperature of below 80° C. and at a pressure below atmospheric pressure, whereby an aqueous suspension of the laden polymer microparticles is obtained. The present invention also relates to microparticles laden with an aroma chemical, obtainable by the process described herein and to products containing the microparticle composition. The compositions are useful as additives for imparting a scent or flavour to a product. The compositions allow for controlled release of the aroma chemicals.

    HYBRID ORGANIC-INORGANIC NANO-PARTICLES

    公开(公告)号:US20220380607A1

    公开(公告)日:2022-12-01

    申请号:US17838875

    申请日:2022-06-13

    Abstract: The invention relates to a method of making hybrid organic-inorganic core-shell nano-particles, comprising the steps of a) providing colloidal organic particles comprising a synthetic polyampholyte as a template; b) adding at least one inorganic oxide precursor; and c) forming a shell layer from the precursor on the template to result in core-shell nano-particles. With this method it is possible to make colloidal organic template particles having an average particle size in the range of 10 to 300 nm; which size can be controlled by the comonomer composition of the polyampholyte, and/or by selecting dispersion conditions.
    The invention also relates to organic-inorganic or hollow-inorganic core-shell nano-particles obtained with this method, to compositions comprising such nano-particles, to different uses of said nano-particles and compositions, and to products comprising or made from said nano-particles and compositions, including anti-reflective coatings and composite materials.

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