Bitumen/polymer component making it possible to obtain bitumen/polymer compositions with very low thermal sensitivity, capable of being employed for the production of surfacings
AssigneeElf Antar France
InventorsPierre Chaverot, Claude Lacour
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Abstract
A bitumen/polymer component of the type consisting of a hydrocarbon matrix is provided in which a sulphur-crosslinked elastomer is distributed homogeneously in a quantity such that it presents 5% to 20% by weight of the bitumen/polymer component. The component exhibits a penetration, determined according to NF standard T 66004, and a ball-and-ring softening temperature, determined according to NF standard T 66008, such that the Pfeiffer number, which links these quantities, assumes values greater than 5 in the case of the bitumen/polymer component.
Claims41
Bitumen/polymer component comprised of a hydrocarbon matrix in which a sulphur-crosslinked elastomer is distributed homogeneously in a quantity such that it represents 5% to 20% by weight of the bitumen/polymer component, the said component exhibiting a penetration, determined according to NF standard T 66004, and a ball-and-ring softening temperature, determined according to NF standard T 66008, such that the Pfeiffer number, which links these quantities, assumes values greater than 5 for the bitumen/polymer component.
Bitumen/polymer composition with a low thermal sensitivity, comprising a bituminous matrix in which a sulphur-crosslinked elastomer is distributed homogeneously in a quantity of 0.5% to 15% by weight of the composition, and which has a penetration, determined according to NF standard T 66004, of between 80 and 400 and a ball-and-ring softening temperature, determined according to NF standard T 66008, higher than 55.degree. C., the said composition being characterised in that it exhibits a Pfeiffer number greater than 5.
Composition according to 24, wherein the sulphur-crosslinked copolymer of styrene and of a conjugated diene contains 5% to 50% of styrene.
Dependencies are inferred from the claim text.