# US 9,862,843 B2 · Metal-oxide nanofiller, method for synthesising same, and use thereof in a fluorocarbon-resin non-stick coating

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- Number: US 9,862,843 B2
- Document ID: US9862843B2
- Status: Granted
- Kind: B2
- Application number: 13/990,431
- Filed: 2011-11-30
- Published: 2014-02-06
- Granted: 2018-01-09
- Earliest claimed: 2010-11-30
- Assignees: Seb S.A.; Ecole Nationale Superieure De Chimie De Montpellier; Specific Polymers
- Applicants: Nelly Durand; Bernard Boutevin; Bruno Ameduri; Cedric Loubat; Barbara Gantillon; Jean-Luc Perillon
- Inventors: Nelly Durand; Bernard Boutevin; Bruno Ameduri; Cedric Loubat; Barbara Gantillon; Jean-Luc Perillon
- Web page: https://patentgrep.com/patent/US9862843B2

## CPC

- C09D 7/63: organic
- A47J 36/025: {Vessels with non-stick features, e.g. coatings}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- C09C 1/3072: {Treatment with macro-molecular organic compounds}
- C09C 1/3081: {Treatment with organo-silicon compounds}
- C09C 1/309: {Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081}
- C09C 1/407: {Aluminium oxides or hydroxides}
- C09C 3/006: {Combinations of treatments provided for in groups C09C3/04 - C09C3/12}
- C09C 3/10: Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)}
- C09C 3/12: Treatment with organosilicon compounds {(C09C3/006 takes precedence)}
- C09D 7/41: Organic pigments; Organic dyes
- B05D 5/083: {involving the use of fluoropolymers}
- C01P 2002/86: by NMR- or ESR-data
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01P 2006/12: Surface area
- 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)
- A47J: KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- 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}
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

Provided is a metal-oxide nanofiller including at least two graft chains, at least one of the chains being hydrophilic and the other being a hydrophobic chain compatible with fluorinated polymers. The hydrophobic chain is an oligomer, the weight-average molar mass Mw of which is between 300 and 20,000 g/mol−1. Also provided is a non-stick coating comprising such a filler, as well as to a culinary article provided with such a coating.

## Claims

### Claim 1

A nanofiller of a metal-oxide comprising at least two graft chains, at least one of the chains being hydrophilic and the other being a hydrophobic chain compatible with fluorinated polymers,
wherein the hydrophilic chain is a derivative of polyalkylene glycol modified by:
either an alkoxysilane,
or a phosphonic acid or ester,
or a phosphinic acid or ester,
or a carboxylic acid, and
wherein the hydrophobic chain is an oligomer, the weight-average molar mass Mw of which is between 300 and 20,000 g/mol.

### Claim 2 (depends on 1)

The nanofiller according to claim 1, wherein the hydrophobic chain is an oligomer, the weight-average molar mass Mw of which is between 500 and 10,000 g/mol.

### Claim 3 (depends on 2)

The nanofiller according to claim 2, wherein the hydrophobic chain is an oligomer, the weight-average molar mass Mw of which is between 1000 and 5000 g/mol.

### Claim 4 (depends on 1)

The nanofiller according to claim 1, wherein the metal oxide is selected among the group constituted of silica, alumina, cerium oxide, zinc oxide, vanadium oxide, zirconium oxide, and titanium dioxide.

### Claim 5 (depends on 4)

The nanofiller according to claim 4, wherein the metal oxide is silica, colloidal silica or pyrogenic silica.

### Claim 6 (depends on 5)

The nanofiller according to claim 5, wherein it is constituted of silica comprising two graft chains:
one of the chains being a hydrophilic chain consisting in a derivative of polyethylene glycol modified by a triethoxysilane, and
the other chain being an oligomer of the hexafluoropropylene oxide (HFPO) modified by a triethoxysilane or a methyldiethoxysilane.

### Claim 7 (depends on 1)

The nanofiller according to claim 1, wherein the polyalkylene glycol derivative is a polyethylene-glycol (PEG) derivative or a polypropylene glycol (PPG) derivative.

### Claim 8 (depends on 1)

The nanofiller according to claim 1, wherein the hydrophilic chain is a derivative of polyethylene glycol modified by an alkoxysilane.

### Claim 9 (depends on 1)

The nanofiller according to claim 1, wherein the hydrophobic chain or chains is (or are) an oligomer of hexafluoropropylene oxide (HFPO), of vinylidene fluoride (VDF), of tetrafluoroethylene (TFE) or co-oligomers VDF-TFE, VDF-hexdfluoropropylene, VDF- chlorotrifluoroethylene, alone or in mixtures and modified by an alkoxysilane.