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    • 9. 发明公开
    • ROAD PAVING BINDERS
    • 铺贴粘结剂
    • EP0858485A4
    • 1999-02-24
    • EP96935877
    • 1996-09-20
    • EXXON RESEARCH ENGINEERING CO
    • GORBATY MARTIN LEOLENOBLE CHRISTIAN GNAHAS NICHOLAS CHARLESPEIFFER DENNIS GEORGE
    • C08L95/00E01C7/26
    • E01C7/267C08L95/00C08L53/00
    • This invention provides for novel road paving binder compositions and the method of making them. One embodiment is a road paving binder composition of a storage stable blend of a sulfonated, unhydrogenated random copolymer of sytrene and butadiene having a sulfonation level of from 1 to 100 meq SO3H/100 g of polymer and a sulfonated asphalt. Another is a method of making a storage stable polymer modified asphalt composition by combining a sulfonated unhydrogenated random styrene butadiene copolymer having a sulfonation level of from about 1 to 100 meq SO3H per 100 g of polymer and a sulfonated asphalt at a temperature of at least about 180 °C to produce a storage stable polymer modified asphalt. Yet another is a method of making a storage stable polymer modified asphalt by combining a sulfonated unhydrogenated random styrene and butadiene copolymer having a sulfonation level of from about 1 to 100 meq SO3H/100 g of polymer, and unsulfonated asphalt and a basic neutralizing agent at a temperature of from about 170 °C to 185 °C to produce a storage stable polymer modified asphalt. Still another is a method for making a storage stable road paving composition by cosulfonation of a blend of unhydrogenated random styrene-butadiene copolymer and an asphalt at 180°-210 °C. The novel road paving asphaltic compositions have enhanced viscoelasticity and storage stability. The compositions can be used as binders in road paving applications. Sulfonated copolymers of random styrene-isoprene may be substituted for the sulfonated copolymers of styrene-butadiene herein.