Process for the preparation of bitumen-polymer composition
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United States of America Patent
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Apr 16, 1996
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N/A
app pub date -
Jul 21, 1995
filing date -
Sep 9, 1988
priority date (Note) -
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Abstract
A process is provided for the preparation of bitumen-polymer compositions wherein bitumen is mixed at a composition between 100.degree. C. and 230.degree. C. with a block copolymer of styrene and a conjugated diene and a coupling agent containing a sulphur-donor compound for a duration of at least 10 minutes. The coupling agent is comprised of an elementary sulphur vulcanization agent and at least one sulphur-donor vulcanization accelerator from among morpholine disulphide, N,N'-disulphide of caprolactam and thiuram polysulphides.
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