# US 2013/0153458 A1 · Self Healing Coating System for Use With Fuel Tanks

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- Number: US 2013/0153458 A1
- Document ID: US20130153458A1
- Status: Published application
- Kind: A1
- Application number: 13/355,588
- Filed: 2012-01-23
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Assignees: Huntsman International LLC
- Inventors: Ali Ozsahin
- Web page: https://patentgrep.com/patent/US20130153458A1

## CPC

- B05D 7/58: {No clear coat specified}
- B05D 7/14: to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23)
- B60K 15/03: Fuel tanks
- C08K 5/09: Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C09D 115/00: Coating compositions based on rubber derivatives (C09D111/00, C09D113/00 take precedence)
- B05D 1/02: performed by spraying
- B05D 2503/00: Polyurethanes
- B05D 2530/00: Rubber or the like
- B60K 2015/03407: {to protect tanks against projectiles}
- Y10T 428/31551: Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T 428/31721: Of polyimide
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention is directed to a coating system deposited onto at least a portion of a substrate comprising: an inner coating layer deposited onto at least a portion of the substrate; a viscous gel coating layer deposited onto at least a portion of the inner coating layer wherein the viscous coating layer comprises: (A) the reaction product of: (i) at least one primary amine; (ii) a monofunctional surfactant; and (iii) a liquid polybutadiene; (B) optionally, a fatty acid; and (C) optionally, a secondary swelling agent; and an outer coating layer deposited onto a least a portion of the viscous coating layer; and an outer coating layer deposited onto a least a portion of the viscous coating layer.

## Claims

### Claim 1

A coating system deposited onto at least a portion of a substrate comprising:
an inner coating layer deposited onto at least a portion of the substrate;
a viscous gel coating layer deposited onto at least a portion of the inner coating layer wherein the viscous coating layer comprises: (A) the reaction product of: (i) at least one primary amine; (ii) a monofunctional surfactant; and (iii) a liquid polybutadiene; (B) optionally, a fatty acid; and (C) optionally, a secondary swelling agent; and an outer coating layer deposited onto a least a portion of the viscous coating layer; and
an outer coating layer deposited onto a least a portion of the viscous coating layer.

### Claim 2 (depends on 1)

The coating system according to claim 1, wherein the polybutadiene compound comprises polybutadienesuccinimide, polybutadienesuccinate ester, or combinations thereof.

### Claim 3 (depends on 1)

The coating system according to claim 1, wherein the inner coating layer is deposited from a coating composition comprising a polyurethane or polyurea coating composition.

### Claim 4 (depends on 1)

The coating system according to claim 1, wherein the outer coating layer is deposited from a coating composition comprising a polyurethane or polyurea coating composition.

### Claim 5 (depends on 1)

The coating system according to claim 1, wherein the outer coating layer and the inner coating layer are deposited from a polyurethane or polyurea coating composition, and wherein the outer coating layer and the inner coating layer may comprise the same or different coating compositions.

### Claim 6 (depends on 1)

The coating system according to claim 1, wherein the (iii) liquid polybutadiene comprises maleic anhydride capped polybutadienes.

### Claim 7 (depends on 1)

The coating system according to claim 1, wherein the mix ratio of (i) and (ii) to (iii) and, optionally, (B) ranges from 1:1 to 1:4 based on to the total volume of the coating composition.

### Claim 8 (depends on 1)

The coating system according to claim 1, wherein (i) comprises at least one tri-functional primary amine and at least one di-functional primary amine; wherein (ii) comprises a non-ionic, mono-hydroxyl surfactant; and wherein (B) comprises a vegetable oil.

### Claim 9 (depends on 1)

The coating system according to claim 1, wherein the substrate is the outer surface of a fuel tank.

### Claim 10

A process for coating a substrate with a coating system comprising:
depositing an inner coating composition onto at least a portion of the substrate wherein the inner coating composition comprises a polyurea or polyurethane coating composition;
depositing a viscous coating composition onto at least a portion of the first coating composition, wherein the viscous coating layer comprises: (A) the reaction product of: (i) at least one primary amine; (ii) a monofunctional surfactant, and (iii) a liquid polybutadiene; (B) optionally, a fatty acid; and (C) optionally, a secondary swelling agent; and
depositing an outer coating composition onto at least a portion of the viscous polyurethane coating composition wherein the outer coating composition comprises a polyurea or polyurethane coating composition that can be the same or different from the polyurea or polyurethane coating composition of the inner coating composition.

### Claim 11 (depends on 10)

The coating system according to claim 10, wherein the swelling agent comprises polybutadienesuccinimide, polybutadienesuccinate ester, or combinations thereof.

### Claim 12 (depends on 10)

The process according to claim 10, wherein the (iii) liquid polybutadiene comprises maleic anhydride capped polybutadienes.

### Claim 13 (depends on 10)

The coating system according to claim 10, wherein the mix ratio of (i) and (ii) to (iii) and, optionally, (B) ranges from 1:1 to 1:4 based on to the total volume of the coating composition.

### Claim 14 (depends on 10)

The process according to claim 10, wherein (i) comprises at least one tri-functional primary amine and at least one di-functional primary amine; wherein (ii) comprises a non-ionic, mono-hydroxyl surfactant; and wherein (B) comprises a vegetable oil.

### Claim 15 (depends on 10)

The process according to claim 10, wherein the inner coating composition is allowed to cure prior to deposition of the viscous polyurethane coating composition.

### Claim 16 (depends on 10)

The process according to claim 10, wherein the substrate is an outer surface of a fuel tank.