# US 10,479,895 B2 · Liquid repellent surfaces

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- Number: US 10,479,895 B2
- Document ID: US10479895B2
- Status: Granted
- Kind: B2
- Application number: 15/479,929
- Filed: 2017-04-05
- Published: 2019-01-31
- Granted: 2019-11-19
- Earliest claimed: 2012-01-06
- Assignees: The United States of America as represented by the Secretary of the Air Force
- Applicants: Massachusetts Institute of Technology; The United States AS Represented By the Secretary of the Air Force
- Inventors: Adam J. Meuler; Robert E. Cohen; Gareth H. McKinley; Joseph M. Mabry
- Web page: https://patentgrep.com/patent/US10479895B2

## CPC

- C09D 5/1625: {organic}
- 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
- C08K 5/549: containing silicon in a ring
- 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 surface can be coated with a liquid repellent coating. Materials for making the liquid repellent coating (e.g., a fingerprint resistant coating) can be selected on the basis of surface energy considerations, such as a receding surface energy. The materials can include a polymer and a liquid repelling material, for example, poly(ethyl methacrylate) and a fluorinated silsesquioxane such as fluorodecyl POSS.

## Claims

### Claim 1

A method of making a liquid repellent coating on a non-porous surface, the method comprising:
combining a fluoropolymer with a polymer, the polymer being poly(ethyl methacrylate), poly(butyl methacrylate), or both, to form a mixture; and
applying the mixture to the non-porous surface to form a coating thereon, the coating being hydrophobic and oleophobic.

### Claim 2 (depends on 1)

The method of claim 1, wherein the fluoropolymer is fluorodecyl polyhedral oligomeric silsesquioxane.

### Claim 3 (depends on 1)

The method of claim 1, wherein applying the mixture includes spin coating.

### Claim 4 (depends on 1)

The method of claim 1, wherein the polymer further comprises poly(methyl methacrylate).

### Claim 5 (depends on 1)

The method of claim 1, wherein the coating has a receding surface energy that is no greater than 50 mN/m.

### Claim 6 (depends on 5)

The method of claim 5, wherein the coating has a receding surface energy that is no greater than 20 mN/m.

### Claim 7 (depends on 6)

The method of claim 6, wherein the coating has a receding surface energy that is no greater than 15 mN/m.

### Claim 8 (depends on 1)

The method of claim 1, further comprising: introducing nanoparticles to the mixture before applying the mixture.

### Claim 9 (depends on 1)

The method of claim 1, wherein the fluoropolymer is a fluorinated nanoparticle.

### Claim 10 (depends on 1)

A hydrophobic and oleophobic coating prepared in accordance with the method of claim 1.