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US 9,028,602 B2Granted
Bituminous composition
AssigneeShell Oil Company
InventorsMajid Jamshed Chughtai, Anindya Kumar Ghosal, Michael David Lankshear, David Strickland
Life of this patent
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Abstract
The invention provides a bituminous composition comprising a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from carboxylic acids, carboxylic esters and carboxylic anhydrides. It further provides a process for making this composition and asphalt compositions comprising such bituminous composition.
Claims22
A bituminous composition, comprising:
- a bitumen in an amount ranging from 20 to 90% wt, a carboxylic additive in an amount of from 0.25 to 5% wt, and sulphur in an amount of 5 to 75% wt, all percentages based on the weight of bitumen, carboxylic additive and sulphur, wherein the carboxylic additive is selected from the group consisting of carboxylic compounds of formula RCOOX wherein R is C8-C22 alkyl or alkenyl;
- and X is H, C1-C22 alkyl, C1-22 alkenyl or R′CO, wherein R′ is C8-C22 alkyl or alkenyl.
Dependencies are inferred from the claim text.