# US 2017/0283628 A1 · Multifunctional coated powders and high solids dispersions

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- Number: US 2017/0283628 A1
- Document ID: US20170283628A1
- Status: Published application
- Kind: A1
- Application number: 15/491,913
- Filed: 2017-04-19
- Published: 2017-10-05
- Earliest claimed: 2011-11-21
- Assignees: Nanophase Technologies Corporation
- Applicants: Nanophase Technologies Corporation
- Inventors: Kushal D. Shah; Harry W. Sarkas; Patrick G. Murray
- Web page: https://patentgrep.com/patent/US20170283628A1

## CPC

- A61K 8/0241: {Containing particulates characterized by their shape and/or structure (see also A61K8/04, A61K8/11, and A61K8/14, further aspects are classified in A61K2800/40 and subcodes)}
- A61K 8/27: Zinc; Compounds thereof
- A61K 8/29: Titanium; Compounds thereof
- A61K 8/892: modified by a hydroxy group, e.g. dimethiconol
- A61Q 17/04: Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
- C09C 1/3661: {Coating}
- C09C 1/3684: {Treatment with organo-silicon compounds}
- C09C 1/3692: {Combinations of treatments provided for in groups C09C1/3615 - C09C1/3684}
- C09C 3/12: Treatment with organosilicon compounds {(C09C3/006 takes precedence)}
- C09D 7/62: modified by treatment with other compounds
- C09D 7/65: macromolecular (C09D7/41-C09D7/48 take precedence)
- A61K 2800/413: Nanosized, i.e. having sizes below 100 nm
- A61K 2800/623: Coating mediated by organosilicone compounds
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2004/80: Particles consisting of a mixture of two or more inorganic phases
- C01P 2006/22: Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
- Y10T 428/2995: Silane, siloxane or silicone coating
- Y10T 428/2998: including synthetic resin or polymer
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A coated powder comprises (a) nanoparticles, and (b) a coating, on the surface of the nanoparticles. The coating comprises (1) silica moieties, (2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and (3) poly(dialkyl)siloxane moieties.

## Claims

### Claim 1

A coated powder comprising:
(a) nanoparticles, and
(b) a coating, on the surface of the nanoparticles, comprising
(1) silica moieties,
(2) organo oxysilane moieties selected from the group consisting of mono-organo oxysilane moieties, bi-organo oxysilane moieties and tri-organo oxysilane moieties, and
(3) poly(dialkyl)siloxane moieties.

### Claim 2 (depends on 1)

The coated powder of claim 1, wherein the nanoparticles comprise at least one oxide selected from the group consisting of zinc oxides, titanium oxides, silicon oxides, aluminum oxides, iron oxides, bismuth oxides, tin oxides, indium oxides tungsten oxides and rare-earth metal oxides.

### Claim 3 (depends on 2)

The coated powder of claim 2, wherein the nanoparticles comprise at least one oxide selected from the group consisting of ZnO, TiO2, SiO2, Al2O3, Fe2O3, CeO2 Bi2O3, antimony-tin oxide, indium-tin oxide, doped WO3, and mixtures thereof.

### Claim 4 (depends on 1)

The coated powder of claim 1, wherein the nanoparticles have an average particle size of 10-500 nm.

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The coated powder of claim 1, wherein the organo oxysilane moieties each have the formula R1nSiO4-n, with n=1, 2 or 3, and each R1 group is independently selected from the group consisting of alkyl, alkenyl, alkynyl, aryl and heterocyclic radical.

### Claim 7 (depends on 6)

The coated powder of claim 6, wherein each R1 group has 1-18 carbon atoms and is independently selected from the group consisting of alkyl, alkenyl and aryl.

### Claim 8

(canceled)

### Claim 9 (depends on 1)

The coated powder of claim 1, wherein the poly(dialkyl) siloxane moieties each have the formula O(SiR22)(R22SiO)n(SiR22)O or O(SiR22)(R22SiO)n(SiR22)ORc, where m is an integer of 2 to 14, each R2 group is an alkyl, and Rcis selected from the group consisting of H, methyl, ethyl and propyl.

### Claim at position 10

10-14. (canceled)

### Claim 15 (depends on 1)

The coated powder of claim 1, wherein the organo oxysilane moieties are present in an amount of 1-5% of the weight of the nanoparticle.

### Claim 16

(canceled)

### Claim 17 (depends on 1)

The coated powder of claim 1, wherein the poly(dialkyl)siloxane moieties are present in an amount of 1-20% of the weight of the nanoparticle.

### Claim at position 14

18-20. (canceled)

### Claim 21

A process for producing a coated powder, comprising coating nanoparticles with a polymer, by polymerizing a composition comprising
(i) the nanoparticles,
(ii) a first alkoxy silane selected from the group consisting of a tetra-alkoxy silane, a poly(tetra-alkoxy silane), and mixtures thereof,
(iii) an organo alkoxysilane selected from the group consisting of mono-organo alkoxysilane, bi-organo alkoxysilane, tri-organo alkoxysilane, and mixtures thereof, and
(iv) a second alkoxy silane selected from the group consisting of a poly(dialkyl)siloxane, and mixtures thereof.

### Claim 22 (depends on 21)

The process of claim 21, wherein the nanoparticles comprise at least one oxide selected from the group consisting of zinc oxides, titanium oxides, silicon oxides, aluminum oxides, iron oxides, bismuth oxides, tin oxides, indium oxides tungsten oxides and rare-earth metal oxides.

### Claim at position 17

23-44. (canceled)

### Claim 45 (depends on 1)

A dispersion, comprising the coated powder of claim 1, and a liquid carrier.

### Claim 46 (depends on 45)

The dispersion of claim 45, comprising at least 50% by weight of the coated powder.

### Claim at position 20

47-52. (canceled)

### Claim 53 (depends on 45)

The dispersion of claim 45, wherein the dispersion has a viscosity of at most 10,000 cP when measured at 25° C. at shear rates ranging from 0.1 sec−1 to 100 sec−1.

### Claim at position 22

54-56. (canceled)

### Claim 57 (depends on 1)

A composition comprising the coated powder of claim 1, wherein the composition is a paint, stain, coating or ink.

### Claim at position 24

58-70. (canceled)

### Claim 71 (depends on 1)

A method of protecting skin from light, comprising coating skin with a composition comprising the coated powder of claim 1.

### Claim at position 26

72-73. (canceled)

### Claim 74 (depends on 45)

A method of protecting skin from light, comprising coating skin with the dispersion of claim 45.

### Claim 75

(canceled)

### Claim 76 (depends on 1)

A method of preventing or reducing lines and wrinkles on the skin, comprising coating skin with a composition comprising the coated powder of claim 1.

### Claim 77 (depends on 1)

A method of preventing loss of elasticity of the skin, comprising coating skin with a composition comprising the coated powder of claim 1.

### Claim 78 (depends on 1)

A method of preventing thinning of the skin, comprising coating skin with a composition comprising the coated powder of claim 1.