Process for the preparation of functionalized elastomer/bitumen compositions and their use in coatings
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Apr 12, 1999
filing date -
Apr 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention provides a method comprising contacting, between 100.degree. C. and 230.degree. C. and under agitation, an elastomer, a functionalising agent and optionally, a peroxide compound. The functionalising agent is a thiolcarboxylic acid polyester or a reaction product of a thiolcarboxylic acid or ester with ethylene sulphide. The functionalised elastomer can also be pre-formed, then incorporated into the bitumen. The resulting compositions are usable directly or after dilution, for forming bituminous binders to produce surfacing, coating and waterproofing materials.
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Cited Art Landscape
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