Doping capsules, composite systems comprising these and also use thereof

Patent metadata

Field	Value
Publication number	US-2016202500-A1
Application number	US-201615080312-A
Country	US
Kind code	A1
Filing date	Mar 24, 2016
Priority date	Dec 20, 2007
Publication date	Jul 14, 2016
Grant date	—

Abstract

The invention relates to doping capsules which have a substance which displays a decreasing transparency with increasing temperature within a defined temperature range due to physicochemical interactions with the polymer matrix to be doped. Likewise, the invention relates to composite systems which have a polymer matrix doped with the doping capsules. The capsules according to the invention are used for sun protection or heat reflection.

First claim

1 - 18 . (canceled)

19 . A method for sun protection and/or heat reflection comprising utilizing doping capsules comprising at least one substance which has a rotator phase in a temperature range of 10 to 55° C., the capsules displaying a decrease in transparency in the temperature range with increasing temperature wherein the at least one substance is present as a separate phase and in monodisperse form.

20 . The method according to claim 19 , wherein the at least one substance has a rotator phase in the temperature range of 15 to 45° C.

21 . The method according to claim 19 , wherein a plastic crystalline phase is formed in the temperature range.

22 . The method according to claim 19 , wherein the at least one substance is selected from the group of saturated or unsaturated hydrocarbons.

23 . The method according to claim 19 , wherein the at least one substance is selected from the group consisting of
saturated or unsaturated aliphatic hydrocarbons (C 10 -C 30 ), saturated or unsaturated fatty alcohols and fatty amines, esters of fatty acids and halogenated hydrocarbons, cholesteryl compounds, polyolefins, organometals, and also mixtures hereof.

24 . The method according to claim 19 , wherein the capsule comprises in addition substances without a rotator phase.

25 . The method according to claim 19 , wherein the capsules are microcapsules and have a diameter in the range of 1 to 10 μm.

26 . The method according to claim 19 , wherein the capsules are nanocapsules and have a diameter in the range of 10 nm to 1 μm.

27 . The method according to claim 25 , wherein the capsules consist of a mixture of microcapsules and nanocapsules.

28 . The method according to claim 19 , wherein the at least one substance comprises saturated or unsaturated aliphatic hydrocarbons (C 10 -C 30 ) comprising n-tetradecane, n-eicosane, n-nonadecane, n-heptacosane, hexadecane or any combination thereof.

29 . The method according to claim 19 , wherein the at least one substance comprises saturated or unsaturated fatty alcohol and/or fatty amine comprising dodecyl alcohol, decyl alcohol, hexadecyl alcohol, dodecylamine, decylamine, hexadecylamine, or any comnination thereof.

30 . The method according to claim 19 , wherein the at least one substance comprises esters of fatty acids and/or halogenated hydrocarbon comprising C 14 -C 26 fatty acid esters, C 14 -C 26 hydrocarbons, perfluoroalkanes, or any combination thereof.

31 . The method according to claim 19 , wherein the at least one substance comprises cholesteryl compound comprising cholesterol monohydrate, cholesteryl acetate, stigmasterol or any combination thereof.

32 . The method according to claim 19 , wherein the at least one substance comprises polyolefin comprising polyethylene, polypropylene, copolymers thereof, or any combination thereof.

33 . The method according to claim 19 , wherein the at least one substance comprises organometal comprising octamethyl ferrocene.

Assignees

• Fraunhofer Ges Forschung

Inventors

• Seeboth Arno
• Mühling Olaf
• Ruhmann Ralf

Classifications

• G02F1/0147

  based on thermo-optic effects (G02F1/132 takes precedence) · CPC title

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• B01J13/02

  Making microcapsules or microballoons {(for medical preparations A61K9/50)} · CPC title

• C08K7/16

  Solid spheres · CPC title

• G02F1/0054

  Structure, phase transitions, NMR, ESR, Moessbauer spectra · CPC title