Use of bisamide compounds to improve the ageing resistance of bitumen
OwnerJulie PREVOST, Laurent BOUTEILLER +2inventors
InventorsJulie PREVOST, Laurent BOUTEILLER, Sandrine PENSEC, Océane FORT
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Abstract
The present invention relates to the use of bisamide compounds to improve the ageing resistance and/or increase the service life and/or delay the appearance of signs of ageing of a bituminous composition. The invention also relates to a method for improving the ageing resistance and/or increasing the service life and/or delaying the appearance of signs of ageing of a bituminous composition.
Claims20
-16. (canceled)
A method for improving the resistance to aging and/or increasing the service life and/or delaying the appearance of signs of aging of a bituminous composition, the method comprising incorporating into the bituminous composition at least one bisamide compound of formula (I)
- RA—X—RC—X′—RB (I)
- wherein
- RA and RB are independently selected from the group consisting of linear, cyclic or branched, saturated or unsaturated hydrocarbon chains comprising 1 to 36 carbon atoms, and optionally comprising heteroatoms,
- RC is a linear, cyclic or branched, saturated or unsaturated hydrocarbon chain comprising 3 to 18 carbon atoms, optionally substituted, and optionally comprising heteroatoms,
- X and X′ represent an amide function —NH—CO— or —CO—NH.
The method according to claim 1, wherein the bisamide compound has the formula (IA)
- RA—CONH—RC—NHCO—RB (IA)
The method according to claim 1, wherein RC represents a linear and saturated hydrocarbon chain.
The method according to claim 1, wherein RC is:
- selected from the group consisting of —C4H8—, —C6H12—, —C8H16—, and —C10H20—.
The method according to claim 1, wherein RA and RB, either identical or different, represent a hydrocarbon chain comprising from 4 to 22 carbon atoms.
The method according to claim 1, wherein RA and RB, either identical or different, represent a linear hydrocarbon chain.
The method according to claim 1, wherein the bisamide compound of formula (I) is used in a concentration from 0.1 to 30% by weight with respect to the total weight of the bituminous composition.
The method according to claim 1, wherein the bituminous composition further additives different from the bisamide compound of formula (I).
The method according to claim 1, wherein the bituminous composition is solid when cold and in a divided form.
The method according to claim 1, wherein the signs of aging are selected from the groups consisting of cracks, detachments, ruts, collapses, potholes, chipping, crumbling, blistering and crazing.
The method according to claim 1, for improving the resistance of the bituminous composition to oxidative and/or thermal aging.
The method according to claim 1, wherein the aging is caused by the presence of oxygen and/or by exposure to ultraviolet radiation and/or by thermal variation and/or by exposure to moisture and/or by exposure to weathering.
The method according to claim 1, for reducing the frequency of renewal and/or of renovation of the roadways.
The method according to claim 1, for reducing the frequency of renewal and/or of renovation of buildings.
The method according to claim 1, wherein the bituminous composition is a bituminous mix.
The method according to claim 1, for reducing and/or minimizing and/or delaying and/or attenuating the degradation of at least one mechanical property of the bituminous composition.
The method according to claim 1, wherein the method comprises at least the following steps:
- i. preparation of a bituminous composition comprising at least one bisamide compound of formula (I) as defined in claim 1,
- ii. subjecting the bituminous composition to an aging process caused by the presence of oxygen and/or by exposure to ultraviolet radiation and/or by thermal variations and/or by exposure to moisture and/or by exposure to weathering,
- iii. measurement of one or a plurality of parameters selected from the group consisting of ring and ball softening temperature, non-recoverable creep compliance, and elastic recovery percentage to evaluate resistance to aging.
Dependencies are inferred from the claim text.