# US 10,308,839 B2 · Asphalt additive compositions and methods of making and using thereof

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- Number: US 10,308,839 B2
- Document ID: US10308839B2
- Status: Granted
- Kind: B2
- Application number: 14/939,575
- Filed: 2015-11-12
- Published: 2016-05-12
- Granted: 2019-06-04
- Earliest claimed: 2014-11-12
- Assignees: Dongre Laboratory Services, Inc.
- Applicants: Dongre Laboratory Services, Inc.
- Inventors: Rajendra Nidhish Dongre
- Web page: https://patentgrep.com/patent/US10308839B2

## CPC

- C09D 195/005: {Aqueous compositions, e.g. emulsions}
- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- E01C 7/18: of road-metal and bituminous binders {(for surface treatments except for penetration coverings, or for thin surface layers E01C7/353; bituminous mixtures C08L95/00)}
- C08L 19/003: {Precrosslinked rubber; Scrap rubber; Used vulcanised rubber}
- C08L 2555/22: Asphalt produced above 140°C, e.g. hot melt asphalt
- C08L 2555/34: Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
- C08L 2555/84: Polymers comprising styrene, e.g. , polystyrene, styrene-diene copolymers or styrene-butadiene-styrene copolymers
- C09D 109/08: Latex
- Y02A 30/30: in transportation, e.g. on roads, waterways or railways
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A composition useful as an asphalt additive includes a plurality of substrate particles and a coating layer disposed on the particles, the coating layer including a solid elastomer. A method of producing an asphalt additive includes mixing an emulsion comprising an elastomer with a plurality of substrate particles. Another composition useful as an asphalt additive includes a plurality of substrate particles substantially coated with a first coating layer and a second coating layer, the first coating layer including a solid elastomer. An asphalt mix includes the asphalt additive composition, aggregate, and a binder.

## Claims

### Claim 1

A composition comprising a plurality of crumb rubber particles and a solid elastomer coating layer disposed on the particles.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the coating layer further comprises a cross-linking agent.

### Claim 3 (depends on 1)

The composition of claim 1 wherein the solid elastomer is selected from the group consisting of styrene butadiene, styrene butadiene rubber, styrene butadiene styrene, chloroprene latex and terpolymer and mixtures thereof.

### Claim 4 (depends on 1)

The composition of claim 1 wherein the solid elastomer is styrene butadiene rubber.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the crosslinking agent is selected from the group consisting of elemental sulfur, a sulfur donating compound, and mixtures thereof.

### Claim 6 (depends on 5)

The composition of claim 5 wherein the sulfur donating compound is a disulphide.

### Claim 7 (depends on 1)

The composition of claim 1 wherein the crumb rubber particles are recycled crumb rubber.

### Claim 8 (depends on 1)

An asphalt mix comprising the composition of claim 1, aggregate and binder.

### Claim 9 (depends on 1)

A method of producing a chip seal surface comprising the steps of
mixing the composition of claim 1 with an asphalt binder to form an asphalt composition;
applying the asphalt composition to a surface to form a sealed surface; and
placing a layer of aggregate over the sealed surface.

### Claim 10

A method of producing an asphalt additive comprising:
mixing an emulsion comprising an elastomer with a plurality of crumb rubber particles; wherein upon mixing the emulsion with the plurality of substrate particles, the emulsion breaks into solid elastomer particles and water.

### Claim 11 (depends on 10)

The method of claim 10, wherein the emulsion further comprises a cross-linking agent.

### Claim 12 (depends on 1)

A method of producing an asphalt mixture comprising the steps of:
combining the composition of claim 1 with aggregate and asphalt binder.

### Claim 13 (depends on 12)

A method of paving a surface comprising the steps of:
applying the asphalt mixture produced from the method of claim 12 to the surface; and
compacting the asphalt mixture on the surface.

### Claim 14 (depends on 1)

A method of producing a high modulus asphalt mixture comprising the steps of:
combining the composition of claim 1 with aggregate and a polymer modified asphalt binder.

### Claim 15 (depends on 14)

A method of paving a surface comprising the steps of:
applying the high modulus asphalt mixture produced from the method of claim 14 to the surface; and
compacting the high modulus asphalt mixture on the surface.

### Claim 16 (depends on 12)

The method of claim 12, wherein the combining step further comprises combining the composition with polyphosphoric acid.

### Claim 17 (depends on 12)

The method of claim 12, wherein the combining step further comprises combining the composition with asphaltenes.

### Claim 18 (depends on 1)

A crack sealant asphalt binder comprising the composition of claim 1.

### Claim 19 (depends on 1)

A roofing asphalt binder comprising the composition of claim 1.

### Claim 20 (depends on 1)

A high modulus asphalt binder comprising the composition of claim 1.

### Claim 21

A composition comprising a plurality of substrate particles substantially coated with a first coating layer and a second coating layer, the first coating layer including a solid elastomer.

### Claim 22 (depends on 21)

The composition of claim 21, wherein the first coating layer is disposed on an outer surface of the plurality of substrate particles and the second coating layer is disposed on an outer surface of the first coating layer.

### Claim 23 (depends on 21)

The composition of claim 21, wherein the second coating layer is disposed on an outer surface of the plurality of substrate particles and the first coating layer is disposed on an outer surface of the second coating layer.

### Claim 24

A composition comprising a plurality of substrate particles and a solid elastomer adhered to the particles.

### Claim 25 (depends on 24)

The composition of claim 24, wherein the plurality of substrate particles are crumb rubber particles.

### Claim 26 (depends on 24)

The composition of claim 24, further comprising a cross-linking agent adhered to the particles.

### Claim 27 (depends on 24)

The composition of claim 24 wherein the solid elastomer is selected from the group consisting of styrene butadiene, styrene butadiene rubber, styrene butadiene styrene, Chloroprene, and terpolymer.

### Claim 28 (depends on 24)

The composition of claim 24 wherein the solid elastomer is styrene butadiene rubber (SBR).

### Claim 29 (depends on 24)

The composition of claim 24 wherein the crosslinking agent is selected from the group consisting of elemental sulfur, a sulfur donating compound, and mixtures thereof.

### Claim 30 (depends on 1)

The composition of claim 1, wherein the coating layer does not fully encapsulate the particles.

### Claim 31

A composition comprising a plurality of crumb rubber particles and a coating layer disposed on the particles, the coating layer consisting essentially of a solid elastomer.