# US 10,308,820 B2 · Paint system containing anti-fouling metal oxide and fumed silica

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- Number: US 10,308,820 B2
- Document ID: US10308820B2
- Status: Granted
- Kind: B2
- Application number: 15/558,241
- Filed: 2016-03-10
- Published: 2018-04-12
- Granted: 2019-06-04
- Earliest claimed: 2015-03-18
- Assignees: Evonik Degussa GmbH
- Applicants: Evonik Degussa GmbH
- Inventors: Georg Duerr; Magdalena Kern; Ruediger Mertsch; Juergen Meyer; Guenther Michael; Juri Tschernjaew
- Web page: https://patentgrep.com/patent/US10308820B2

## CPC

- C09D 5/1618: {inorganic}
- 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 7/61: inorganic
- C08K 3/22: of metals
- C08K 3/36: Silica
- C08K 2003/2248: {of copper}
- 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 paint system contains an anti-fouling metal oxide and a fumed silica, wherein the fumed silica has a BET surface area of 150 to 400 m2/g, a tamped density of 100 to 300 g/l and a thickening of less than 500 mPas.

## Claims

### Claim 1

A pain system, comprising:
an anti-fouling metal oxide; and
a fumed, hydrophilic silica,
wherein the fumed, hydrophilic silica has:
a BET surface area of 150 to 400 m2/g;
a tamped density of 100 to 300 g/l; and
a thickening of less than 500 mPas at 25° C.

### Claim 2 (depends on 1)

The paint system according to claim 1, wherein the anti-fouling metal oxide is at least one selected from the group consisting of copper oxide, titanium dioxide, iron oxide, manganese oxide, vanadium oxide, tin oxide and zinc oxide.

### Claim 3 (depends on 1)

The paint system according to claim 1, wherein a proportion of anti-fouling metal oxide is 0.5% to 60% by weight, based on a total weight of the paint system.

### Claim 4 (depends on 1)

The paint system according to claim 1, wherein a proportion of fumed, hydrophilic silica is 5% to 40% by weight, based on a total weight of the paint system.

### Claim 5 (depends on 1)

The paint system according to claim 1, further comprising:
a film-forming resin.

### Claim 6 (depends on 1)

A substrate coated with the paint system according claim 1.

### Claim 7 (depends on 1)

A method of coating an article, said method comprising:
applying the paint system according to claim 1 to the aquatic region of a watersports boat, a commercial ship or a built structure to be immersed in water.