Diisobutylene is a highly branched C8 olefin obtained by the dimerization of a pre-treated isobutylene feedstock. INEOS Oligomers’ Diisobutylene HP product contains over 95% of 2,4,4-trimethylpentenes (TMP), split approximately 75/20 between the TMP1 and TMP2 isomers. Diisobutylene 99 product contains over 99% of 2,4,4-trimethylpentenes (TMP). Diisobutylene is an intermediate for a wide range of chemical products used in rubbers, polymers and lubricants, when high compatibility and chemical stability are required.


  • Octylphenol resins used as tackifiers in radial tires
  • Octylated diphenylamine stabilizers for lubricants and rubbers
  • Isononyl derivatives used to produce polymerization initiators and compressor fluids
  • Sulphur additives for anti-wear lubricants and HALS stabilizers for outdoor polyolefin applications
  • Diisobutylene is also used as a co-monomer in the production of elastomers and hydrocarbon resins, or as chain stop agent for polycarbonate resins.


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