C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/37 (2006.01) C04B 26/26 (2006.01) C08J 3/24 (2006.01) C08L 25/10 (2006.01) C08L 95/00 (2006.01) E01C 7/18 (2006.01) E04B 1/66 (2006.01)
Patent
CA 2720491
The invention relates to a method of preparing crosslinked bitumen/polymer compositions having reduced emissions of hydrogen sulphide, in which, while operating at temperatures between 100°C and 230°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-R-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=O carbonyl function and/or a O-C=O carboxylate function.
L'invention concerne un procédé de préparation de compositions bitume/polymère réticulées à émissions réduites d'hydrogène sulfuré, dans lequel on met en contact, en opérant à des températures comprises entre 100°C et 230°C et sous agitation, pendant une durée d'au moins dix minutes, au moins un bitume ou mélange de bitumes avec au moins un polymère et au moins un agent réticulant, ledit agent réticulant étant représenté par la formule générale HS-R-SH où R représente un groupe hydrocarboné, saturé ou insaturé, linéaire ou ramifié, cyclique et/ou aromatique, de 2 à 40 atomes de carbones, comprenant éventaellement un ou plusieurs hétéroatomes, et ne comprenant pas de fonction carbonyle C=O et/ou de fonction carboxylate O- C.ident.O.
Botel Romuald
Chaverot Pierre
Dreessen Sylvia
Godivier Charlotte
Robic
Total Raffinage Marketing
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