Encapsulated materials in porous particles

Patent metadata

Field	Value
Publication number	US-2017306221-A1
Application number	US-201515512839-A
Country	US
Kind code	A1
Filing date	Sep 22, 2015
Priority date	Sep 23, 2014
Publication date	Oct 26, 2017
Grant date	—

Abstract

The invention provides a process for the production of a (particulate) luminescent material comprising particles, especially substantially spherical particles, having a porous inorganic material core with pores, especially macro pores, which are at least partly filled with a polymeric material with a first material embedded therein, wherein the process comprises (i) impregnating the particles of a particulate porous inorganic material with pores with a first liquid (“ink”) comprising the first material and a curable or polymerizable precursor of the polymeric material, to provide pores that are at least partly filled with said first material and curable or polymerizable precursor; and (ii) curing or polymerizing the curable or polymerizable precursor within pores of the porous material, as well as a product obtainable thereby. The first material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.

First claim

1 . A process for the production of a particle material comprising particles having a porous inorganic material core with pores which are at least partly filled with a polymeric material with a first material embedded therein, wherein the process comprises:
impregnating the particles of the particulate porous inorganic material with pores with a first liquid comprising the first material and a curable or polymerizable precursor of the polymeric material, to provide pores that are at least partly filled with said first material and curable or polymerizable precursor; and curing or polymerizing the curable or polymerizable precursor within pores of the porous material, wherein the first material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.

2 . The process according to claim 1 , wherein before curing or polymerizing but after impregnation the particles, the impregnated particles and possible remaining first liquid are separated.

3 . The process according to claim 1 , wherein the pores of the porous inorganic material are hydrophobized.

4 . The process according to claim 1 , wherein the particles have particle sizes (ps) in the range of 1-500 μm, wherein the porous inorganic material comprises one or more of a porous silica, a porous alumina, a porous glass, a porous zirconia, and a porous titania, wherein the pores have mean pore sizes (dp) in the range of 0.1-10 μm, and wherein the precursor comprises a curable acrylate or silicone.

5 . The process according to claim 1 , wherein the process further comprises applying an encapsulation to the particles obtained after curing or polymerizing.

6 . The process according to claim 5 , wherein the process comprises providing the encapsulation by at least partly coating the particles with an inorganic coating selected from the group consisting of a silicon containing oxide, an aluminum containing oxide, a zirconium containing oxide, a glass, a titanium containing oxide, a hafnium containing oxide and an yttrium containing oxide, or with an organic coating selected from the group consisting of polyvinyl alcohol, polyacrylate, polysiloxane, polyurethane, polycarbonate, polyimide, polymetacrylate, polystyrene, polyethene, polypropylene, parylene.

7 . The process according to claim 5 , wherein the process comprises providing the encapsulation by multi-layer coating the particles, wherein the thus obtained multi-layer coating comprises an organic polymer coating and an inorganic coating, or at least two coatings selected from the group of a silicon containing oxide, an aluminum containing oxide, a zirconium containing oxide, a glass, a titanium containing oxide, a hafnium containing oxide and an yttrium containing oxide.

8 . The process according to claim 1 , wherein the pores of the porous inorganic material core are partly filled with said polymeric material with said first material, and the process further comprises after curing or polymerizing:
further impregnating the particles of the particulate porous inorganic material with pores with a second liquid optionally comprising a further material and a curable or polymerizable precursor of a polymeric material, to provide pores that are at least partly further filled with optionally said further material and curable or polymerizable precursor; and curing or polymerizing the curable or polymerizable precursor within pores of the porous material, wherein the optional further material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.

9 . The process according to claim 5 , wherein the process comprises one or more of (i) providing the encapsulation by embedding the particles in a light transmissive solid matrix, and (ii) providing the encapsulation by at least partly coating the particles and subsequently embedding the particles in a light transmissive solid matrix.

10 . A particle material comprising particles having an porous inorganic material core with pores which are at least partly filled with polymeric material with a first material embedded therein, wherein the first material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.

11 . The particle material according to claim 10 , wherein the particles comprise an encapsulation encapsulating at least a part of the core.

12 . The particle material according to claim 11 , wherein the encapsulation comprises a coating that at least partly coats the particles with an inorganic coating selected from the group consisting of a silicon containing oxide, an aluminum containing oxide, a zirconium containing oxide, a glass, a titanium containing oxide, a hafnium containing oxide and an yttrium containing oxide or with an organic coating selected from the group consisting of polyvinyl alcohol, polyacrylate, polysiloxane, polyurethane, polycarbonate, polyimide, polymetacrylate, polystyrene, polyethene, polypropylene, parylene.

13 . The particle material according to claim 11 , wherein the encapsulation comprises a multi-layer coating that coats the particles, wherein the multi-layer coating comprises an organic polymer coating and an inorganic coating, or at least two coatings selected from the group of a silicon containing oxide, an aluminum containing oxide, a zirconium containing oxide, a glass, a titanium containing oxide, a hafnium containing oxide and an yttrium containing oxide.

14 . The particle material according to claim 10 , wherein the particles have particle sizes (ps) in the range of 1-500 μm, wherein the porous inorganic material comprises one or more of a porous silica, a porous alumina, a porous glass, a porous zirconia, and a porous titania, wherein the pores have mean pore sizes (dp) in the range of 0.1-10 μm, and wherein the polymeric material comprises one or more of an acrylate, silicone, or epoxy type polymer, and wherein the encapsulation comprises an inorganic coating.

15 . A solid member comprising a solid matrix with the particle material according to claim 10 , wherein the particle material being embedded in the solid matrix.

16 . A wavelength converter comprising a solid member according to claim 15 , wherein the first material comprises an organic luminescent material and/or a rare-earth luminescent material.

17 . A lighting device comprising:
a light source configured to generate light source light, the particle material according to claim 10 , wherein the first material comprises an organic luminescent material and/or a rare-earth luminescent material, configured to convert at least part of the light source light into visible luminescent material light.

Assignees

• Philips Lighting Holding Bv

Inventors

• Koole Roelof
• Baesjou Patrick John
• Talgorn Elise Claude Valentine
• Kriege Jan Cornelis
• Cillessen Johannes Franciscus Maria
• Lub Johan
• Hikmet Rifat Ata Mustafa

Classifications

• C03C14/004

  the non-glass component being in the form of particles or flakes · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title

• G01K11/14

  of inorganic materials · CPC title

• C09D183/04

  Polysiloxanes · CPC title

• B01J2/006

  Coating of the granules without description of the process or the device by which the granules are obtained (to prevent the granules sticking together B01J2/30) · CPC title