Diisobutylene (DIB)

Di-isobutylene, or DIB, is a liquid mixture containing two isomers, 2,4,4-trimethyl-pentene-1 and 2,4,4-trimethyl-pentene-2 (sometimes referred to as DIB-1 and DIB-2).

Total isomer purity is critical in various applications where the presence of other isomers and codimers can have a detrimental impact on performance.

Janex supplies DIB in bulk parcels and isotanks.

Used as a chemical intermediate, DIB has applications in many industries including rubber chemicals, lubricant additives and coatings.

Diisobutylene CAS 25167-70-8 / EC 246-690-9

Process:

There are different routes to produce DIB:

reacting high purity isobutylene over a solid acid catalyst;
reacting Raffinate 1 with sulfuric acid which selectively condenses the isobutylene content to DIB; and
using an acidic ion-exchange resin to make the same condensation as when using Raffinate 1

Main applications:

3,5,5-trimethylhexanol
bis(2,4,4-trimethylpentyl) phosphinic acid
Iso-nonanoic acid
Neononanoic acids
Octenyl succinic anhydride
Octylated diphenylamine
Octylphenol (for resin and surfactant use)
Perfumery
Photographic chemicals
Sulfurised DIB
Tert-octylamine
Water-soluble polymers