# US 8,772,381 B2 · Use of waxes in a cross-linked bitumen/polymer composition for improving its resistance to chemical attack and cross-linked bitumen/ polymer composition comprising said waxes

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- Number: US 8,772,381 B2
- Document ID: US8772381B2
- Status: Granted
- Kind: B2
- Application number: 13/504,876
- Filed: 2010-10-29
- Published: 2012-08-30
- Granted: 2014-07-08
- Earliest claimed: 2009-10-29
- Assignees: Total Raffinage Marketing
- Applicants: Sylvia Harders; Julien Chaminand
- Inventors: Sylvia Harders; Julien Chaminand
- Web page: https://patentgrep.com/patent/US8772381B2

## CPC

- C08L 95/00: Compositions of bituminous materials, e.g. asphalt, tar, pitch
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present disclosure relates to the use of 2 to 6% by mass of Fischer-Tropsch waxes in a cross-linked bitumen/polymer composition for improving the cross-linked bitumen/polymer composition's resistance to aggressive chemical agents.

## Claims

### Claim 1

A method for improving the resistance to aggressive chemical agents of a cross-linked bitumen/polymer composition comprising from 1 to 10% by mass of a crosslinked aromatic monovinyl hydrocarbon and conjugated diene copolymer, with respect to the mass of the cross-linked bitumen/polymer composition, in which said aromatic monovinyl hydrocarbon and conjugated diene, copolymer has a content of 1,2 double bond units originating from the conjugated diene, comprised between 5% and 50% by mass, with respect to the total mass of the conjugated diene units and using 2 to 6% by mass of Fischer-Tropsch waxes, with respect to the mass of the cross-linked bitumen/polymer composition.

### Claim 2 (depends on 1)

The method according to claim 1, in which the cross-linked aromatic monovinyl hydrocarbon and conjugated diene copolymer is a cross-linked styrene and butadiene copolymer.

### Claim 3 (depends on 1)

The method according to claim 1, in which the content of 1,2 double bond units originating from the conjugated diene, comprised between 10% and 40% by mass, with respect to the total mass of the conjugated diene units.

### Claim 4 (depends on 1)

The method according to claim 1, in which the aromatic monovinyl hydrocarbon and conjugated diene copolymer is combined with a cross-linking agent.

### Claim 5 (depends on 4)

The method according to claim 4, in which the cross-linking agent comprises flowers of sulphur.

### Claim 6 (depends on 4)

The method according to claim 4, in which the cross-linking agent is chosen from the compounds of general formula HS—R—SH, where R represents a saturated or unsaturated, linear or branched hydrocarbon group with 2 to 40 carbon atoms, optionally comprising one or more heteroatoms.

### Claim 7 (depends on 4)

The method according to claim 4, in which the cross-linked bitumen/polymer composition comprises from 0.05 to 5% by mass of cross-linking agent, with respect to the mass of the cross-linked bitumen/polymer composition.

### Claim 8 (depends on 1)

The method according to claim 1, in which the aggressive chemical agents are hydrocarbons.

### Claim 9 (depends on 1)

The method according to claim 1, in which the aggressive chemical agents are products used for de-icing, defrosting and/or snow removal.

### Claim 10 (depends on 1)

The method according to claim 1 for improving the cross-linked bitumen/polymer composition's resistance to aggressive chemical agents when it is in a mixture with aggregates in a bituminous mix.

### Claim 11 (depends on 6)

The method according to claim 6, in which the one of more heteroatoms comprise oxygen.