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EnvalyxPrecision upcycling

NR-containing tire rubber

End-of-life tire crumb and rubber scrap with a defined NR fraction.

Target output

Carbonyl-terminated oligomers · residual solids

Black automotive tire with visible tread and sidewall

Access constraints

  • Sulfur crosslinks
  • Carbon black
  • Oils
  • Reinforcement
The poly(cis-1,4-isoprene) repeat unit with an explicit sulfur crosslink to an adjacent chain, oxidatively cleaved at the carbon-carbon double bond to give a methyl-ketone terminus and an aldehyde terminus alongside residual solids.

01Input

nSₓrepresentativeallylic bridgeadjacent chainpoly(cis-1,4-isoprene)
Envalyx development route

02Target output

Omethyl-ketone terminusOaldehyde terminus+carbonyl-terminated fragmentsresidual solids · Sₓ · carbon black · fillers

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