Method for preparing telechelic oligomers from tire waste
AssigneesCentre National De La Recherche Scientifique, Universite Du Maine
InventorsJean-Francois Pilard, Irene Campistron, Faten Sadaka, Albert Laguerre
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Abstract
A method for manufacturing a composition including telechelic oligomers the ends of which carry reactive functions, the method including the contacting of at least one waste material containing rubber, preferable tire waste, with a chemical degradation agent selected from cleavage agents that are specific for double bonds; and a transfer agent in the presence of a catalysts; at a temperature from 15 to 400° C., preferably from 17 to 35° C.; at ambient pressure. The composition of oligomers that can be prepared by the method is also described.
Claims13
A method for recycling tire waste, wherein said method comprises:
- placing in contact at least one tire waste containing rubber:
- with a chemical degradation agent selected from the group consisting of (a) cleavage agents that are specific for double bonds comprising periodic acid and (b) a transfer agent with a metathesis catalyst,
- at a temperature ranging from 15 to 40° C., and
- at ambient pressure, leading to a composition comprising a solid phase and a liquid phase, the liquid phase comprising said telechelic oligomers, said composition having a polymolecularity index ranging from 1 to 3;
- and
- separating the solid phase and liquid phase, wherein the liquid phase comprising said telechelic oligomers is removed.
Dependencies are inferred from the claim text.