C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 95/00 (2006.01) C08L 53/02 (2006.01) C08L 91/00 (2006.01) C10C 3/02 (2006.01)
Patent
CA 2102316
A bitumen is mixed, between 100 °C and 200 °C with (i) a linear sequenced styrene/conjugated diene copolymer A-B or A-B-A. A being a polymer sequence consisting of a polystyrene block alone or extended; on the B side, by a statistical styrene and conjugated diene copolymer, and B being a polymer sequence of the conjugated diene and (ii) a sulfur-donor coupling agent and the mixture obtained is maintained between 100 °C and 230 °C under stirring conditions during at least ten minutes. The se- quenced-copolymer has a molecular mass Mw between 120000 and 400000 and a styrene contents in the form of polystyren block comprised between 52 % and 14.7 % by weight of the copolymer. The resulting compositions are used for producing road surface coatings, sealing coats and covers.
Germanaud Laurent
Nicol Pascal
Planche Jean-Pascal
Travers Francois
Elf Antar France
Road Science L.l.c.
Robic
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