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Total Raffinage Marketing

Centre National De La Recherche Scientifique

Totalenergies Onetech

Romuald Botel

Mouhamad Mouazen

Sylvia Harders

Carole Ruot

Ludwik Leibler

Laurence Lapalu

Ilias Iliopoulos

Pierre Chaverot

Julien Chaminand

Charlotte Godivier

Sylvia Dreessen

Ornella Annabelle Zovi

Nour Dridi

Thermally crosslinkable bitumen/polymer composition based on at least one elastomer of S-B1-B2 type, with S a styrene polymer or other vinylaromatic polymer, B1 and B2 polybutadienes, the composition including an adjuvant of olefinic polymer type, the composition having improved mechanical properties. Use of these compositions in the fields of road applications such as hot bituminous mixes; warm bituminous mixes; cold bituminous mixes, for example cold-poured bituminous mixes or emulsion gravels; or surface dressings, for example fluxed bitumens or emulsions; and in the fields of industrial applications, for example in the manufacture of internal and external coatings.

Bitumen/polymer composition having improved mechanical properties

The invention relates to a bitumen/polymer composition and to its process of manufacture. The bitumen/polymer composition includes first bitumen base having an intrinsic stability S of greater than 2.5 and/or a degree of peptization Sof greater than 0.60, and a second bitumen base having an intrinsic stability S of less than or equal to 2.50 and/or a degree of peptization Sof less than or equal to 0.60, an elastomer and an olefinic polymer adjuvant functionalized by at least glycidyl functional groups. The values of intrinsic stability S and of the degree of peptization Sare measured according to the standard ASTM D 7157-12. The bitumen/polymer composition exhibits improved low-temperature mechanical properties.

Bitumen/polymer composition having improved low-temperature mechanical properties

The invention relates to a package of performance additives for bitumen or bituminous compositions including an acidic adjuvant and a HS scavenger chosen from organic or inorganic copper salts. The invention also relates to the use of said HS scavenger in order to reduce the HS emissions of bitumen or of a bituminous composition treated with the acidic adjuvant. The invention additionally relates to a process for the preparation of a bituminous composition. The preparation process according to the invention makes it possible to obtain bitumen/crosslinked polymer compositions having better mechanical and dynamic properties in comparison with the bitumen/crosslinked polymer compositions of the prior art, while substantially reducing the releases of hydrogen sulfide (HS).

Bituminous compositions based on phosphoric derivatives

The use in a bituminous composition of an organogelator molecule of the following general formula (I) is disclosed below: where:

Use of organogelator molecules in bituminous compositions to improve the resistance of same to chemical stress

A process for preparing graft polymers from a polymer is based on conjugated diene units and a graft which is a thiol derivative. The process has an absence of solvent and any radical initiator. The graft polymer can be advantageously be used as additive for a bitumen/polymer composition and in particular permits thermoreversible cross-linking.

Process for preparing graft polymers without initiator and without solvent and bitumen/polymer compositions comprising said graft polymers

The disclosure relates to a method of preparing crosslinked bitumen/polymer compositions having reduced emissions of hydrogen sulphide, in which, while operating at temperatures between 100&#xb0; C. and 230&#xb0; C. and with stirring, for a duration of at least ten minutes, at least one bitumen or mixture of bitumens is brought into contact with at least one polymer and at least one crosslinking agent, said crosslinking agent being represented by the general formula HS&#x2014;R&#x2014;SH where R represents a saturated or unsaturated, linear or branched, cyclic and/or aromatic hydrocarbon-based group having 2 to 40 carbon atoms, optionally comprising one or more heteroatoms, and that does not comprise a C&#x2550;O carbonyl function and/or a O&#x2014;C&#x2550;O carboxylate function.

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Chonas l'Amballan, France

Romuald Botel