Bitumen granules which are solid at ambient temperature

Patent metadata

Field	Value
Publication number	US-2022017751-A1
Application number	US-201917413804-A
Country	US
Kind code	A1
Filing date	Dec 9, 2019
Priority date	Dec 12, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

Bitumen granules including at least: bitumen, a compound of general formula R1-(COOH)z (I), a compound of general formula R2-(NH)nCONH—X—(NHCO)p(NH)n-R3 (II), and a compound of general formula Ar1-R-Ar2 (III); and a method for producing the bitumen granules and to the use thereof as asphalt binder.

First claim

1 - 15 . (canceled)

16 . Bitumen pellets comprising at least:
a) bitumen, b) a compound of general formula (I):
R 1 —(COOH) z   (I)

in which R 1 represents a linear or branched hydrocarbon chain comprising from 4 to 68 carbon atoms, and z is an integer ranging from 2 to 4,
c) a compound of general formula (II):
R 2 —(NH) n CONH—X—(NHCO) p (NH) n —R 3   (II)

in which:
the R 2 and R 3 groups, which may be identical or different, represent a hydrocarbon chain comprising from 1 to 22 carbon atoms and optionally comprising heteroatoms, and R 3 may be H,
the group X represents an optionally substituted hydrocarbon chain comprising from 1 to 22 carbon atoms and optionally comprising heteroatoms,
n and p are integers having a value of 0 or 1 independently of one another,

d) a compound of general formula (III):
Ar1-R—Ar2  (III)

in which:
Ar1 and Ar2 represent, independently of one another, an aromatic group comprising from 6 to 20 carbon atoms and chosen from a benzene ring or a system of fused aromatic rings, the aromatic group being substituted by at least one hydroxyl group and optionally by one or more C 1 -C 20 alkyl groups, and
R represents an optionally substituted divalent hydrocarbon radical, the main chain of which comprises from 6 to 20 carbon atoms and at least one group chosen from amide, ester, hydrazide, urea, carbamate and anhydride functions.

17 . The bitumen pellets as claimed in claim 16 , wherein the compound of formula (I) is chosen from diacids of general formula (IA):
HOOC—C w H 2w —COOH  (IA)
with w an integer ranging from 4 to 22.

18 . The bitumen pellets as claimed in claim 17 , wherein the compound of formula (IA) is sebacic acid.

19 . The bitumen pellets as claimed in claim 16 , wherein the compound of general formula (II) is chosen from compounds of formula (IIA):
R 2 —CONH—X—NHCO—R 3   (IIA)
in which R 2 , R 3 and X are as defined in claim 16 .

20 . The bitumen pellets as claimed in claim 19 , wherein the compound of general formula (IIA) is N,N′-ethylenedi(stearamide).

21 . The pellet as claimed in claim 16 , in which the compound of general formula (III) is 2′,3-bis[(3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl)]propionohydrazide.

22 . The bitumen pellets as claimed in claim 16 , comprising from 0.1% to 10% by mass of one or more compounds of formula (I), relative to the total mass of the pellets.

23 . The bitumen pellets as claimed in claim 16 , comprising from 0.1% to 10% by mass of one or more compounds of formula (II), relative to the total mass of the pellets.

24 . The bitumen pellets as claimed in claim 16 , comprising from 0.1% to 10% by mass of one or more compounds of formula (III), relative to the total mass of the pellets.

25 . The bitumen pellets as claimed in claim 16 , which comprise:
a) from 70% to 99.7% by mass of bitumen, b) from 0.1% to 10% by mass of one or more compounds of formula (I), c) from 0.1% to 10% by mass of one or more compounds of formula (II), and d) from 0.1% to 10% by mass of one or more compounds of formula (III), relative to the total mass of the bitumen pellets.

26 . The bitumen pellets as claimed in claim 25 , which comprise:
a) from 82% to 98.5% by mass of bitumen, b) from 0.5% to 6% by mass of one or more compounds of formula (I), c) from 0.5% to 6% by mass of one or more compounds of formula (II), and d) from 0.5% to 6% by mass of one or more compounds of formula (III), relative to the total mass of the bitumen pellets.

27 . The bitumen pellets as claimed in claim 16 , the pellets being covered on at least a portion of their surface with an anti-agglomerating agent.

28 . The bitumen pellets as claimed in claim 27 , wherein the anti-agglomeration agent is chosen from particulate anti-agglomerating agents, film-forming anti-agglomerating agents, and mixtures thereof.

29 . A method for manufacturing bitumen pellets as claimed in claim 16 , comprising at least the following steps:
1) providing a bituminous composition comprising at least: bitumen, a compound of general formula (I), a compound of general formula (II) and a compound of formula (III), 2) forming the bituminous composition into the form of pellets, and 3) optionally, coating the pellets on all or part of their surface with at least one anti-agglomerating agent.

30 . The bitumen pellets as claimed in claim 16 which are a road binder.

31 . A method for manufacturing bituminous mixes comprising at least one road binder and aggregates or recycled bituminous mix aggregates, the road binder being in the form of bitumen pellets as claimed in claim 30 , this method comprising at least the steps of:
heating the aggregates to a temperature ranging from 100° C. to 180° C., mixing the aggregates with the road binder in a vessel, obtaining bituminous mixes.

32 . The method as claimed in claim 31 , which does not comprise a step of heating the road binder before it is mixed with the aggregates.

33 . A method for transporting and/or storing and/or handling bitumen, wherein the method comprises
a step consisting in the preparation of the bitumen in the form of bitumen pellets according to claim 16 , and a step wherein the bitumen in the form of bitumen pellets is transported and/or stored and/or handled at ambient temperature.

Assignees

• Total Marketing Services
• Eiffage Infrastructures

Inventors

• Vincent Régis
• Colliat Romain

Classifications

• C08L95/00 Primary

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• C08K5/092 Primary

  Polycarboxylic acids · CPC title

• C08J2395/00

  Bituminous materials, e.g. asphalt, tar or pitch · CPC title

• C08J2495/00

  Bituminous materials, e.g. asphalt, tar or pitch · CPC title

• E01C7/20

  Binder incorporated in cold state, e.g. natural asphalt · CPC title