# US 9,714,308 B2 · Copolymer for a hydrophobic coating having an improved durability

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- Number: US 9,714,308 B2
- Document ID: US9714308B2
- Status: Granted
- Kind: B2
- Application number: 14/903,436
- Filed: 2014-07-03
- Published: 2016-06-09
- Granted: 2017-07-25
- Earliest claimed: 2013-07-08
- Assignees: Saint-Gobain Glass France; Specific Polymers
- Applicants: Saint-Gobain Glass France; Specific Polymers
- Inventors: François Guillemot; Cédric Loubat
- Web page: https://patentgrep.com/patent/US9714308B2

## CPC

- C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate}
- C03C 17/32: with synthetic or natural resins (C03C17/30 takes precedence)
- C03C 17/3405: {with at least two coatings of organic materials (C03C17/36, C03C17/42 take precedence)}
- C09D 5/00: Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes
- C09D 133/12: Homopolymers or copolymers of methyl methacrylate
- C03C 17/30: with silicon-containing compounds
- C03C 2217/76: Hydrophobic and oleophobic coatings
- C08F 220/24: containing perhaloalkyl radicals
- C08F 220/382: {and containing oxygen, e.g. 2-sulfoethyl (meth)acrylate}
- C08K 9/06: with silicon-containing compounds
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- 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)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A copolymer includes a first group that is hydrophobic and a second group that is crosslinkable. Moreover, a glass substrate includes a coating of the copolymer, with interposition of a layer of silane including a functional group capable of reacting with the crosslinkable group. The glass substrate may be used as hydrophobic glazing for a transport vehicle, shower cubicle wall or easy-to-clean interior glazing.

## Claims

### Claim 1

A glass substrate comprising a coating of a copolymer of formula (I):
in which:
the R1 group is hydrophobic,
the R2 group is crosslinkable,
x, z and t>0 and y≧0 and x+y+z+t=1,
n is an integer, with interposition of a layer of silane having a functional group capable of reacting with the crosslinkable R2 group.

### Claim 2 (depends on 1)

The glass substrate as claimed in claim 1, wherein the copolymer coating comprises inorganic fillers.

### Claim 3 (depends on 2)

The glass substrate as claimed in claim 2, wherein said inorganic fillers are silica nanoparticles.

### Claim 4 (depends on 2)

The glass substrate as claimed in claim 2, wherein the surface of said inorganic fillers exhibits a functional group capable of reacting with the crosslinkable R2 group.

### Claim 5 (depends on 1)

A method comprising utilizing a glass substrate as claimed in claim 1 as hydrophobic glazing for a transport vehicle.

### Claim 6 (depends on 1)

A method comprising utilizing a glass substrate as claimed in claim 1 as shower cubicle wall.

### Claim 7 (depends on 1)

A method comprising utilizing a glass substrate as claimed in claim 1 as easy-to-clean interior glazing.

### Claim 8 (depends on 1)

The glass substrate as claimed in claim 1, wherein the R1 group is a —(CF2)mCF3 group, with m=5, 7, 9 or 11, or a —OC(═O)CF(CF3)(OCF2CF(CF3))pF group, p being an integer between 2 and 10.

### Claim 9 (depends on 1)

The glass substrate as claimed in claim 1, wherein the R2 group carries an epoxide, mesyl, tosyl or isocyanate functional group.

### Claim 10 (depends on 1)

The glass substrate as claimed in claim 1, wherein the R1 group is a —OC(═O)CF(CF3)(OCF2CF(CF3))pF group, p being an integer between 2 and 10.