Metal-oxide nanofiller, method for synthesising same, and use thereof in a fluorocarbon-resin non-stick coating

Patent metadata

Field	Value
Publication number	US-9862843-B2
Application number	US-201113990431-A
Country	US
Kind code	B2
Filing date	Nov 30, 2011
Priority date	Nov 30, 2010
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

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.

First claim

The invention claimed is:

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.

2. 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.

3. 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.

4. 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.

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

6. 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.

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

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

9. 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.

Assignees

• Durand Nelly
• Boutevin Bernard
• Ameduri Bruno
• Loubat Cedric
• Gantillon Barbara
• Perillon Jean-Luc
• Seb Sa
• Enscm
• Specific Polymers

Inventors

• Durand Nelly
• Boutevin Bernard
• Ameduri Bruno
• Loubat Cedric
• Gantillon Barbara
• Perillon Jean-Luc

Classifications

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C09C3/10

  Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} · CPC title

• C09D7/1233 Primary

  Chemistry & Metallurgy · mapped topic

• A47J36/025

  Vessels with non-stick features, e.g. coatings · CPC title

• C01P2004/64

  Nanometer sized, i.e. from 1-100 nanometer · CPC title