4-tert-Butylphenol
4-tert-Butylphenol is an organic compound with the formula 3CC6H4OH. It is one of three isomeric tert-butyl phenols. It is a white solid with a distinct phenolic odor. It dissolves in basic water.
Manufacture
It can be prepared by acid-catalyzed alkylation of phenol with isobutene, 2-tert-butylphenol being the major side product. It can be produced by diverse transalkylation reactions.Uses
Its major uses are in the production of epoxy resins and curing agents and also in polycarbonate resins. It has also found use in the production of phenolic resins. Another use is in the production of para tertiary butylphenol formaldehyde resin. It has also found use as a plasticizer.Bisphenol A is difunctional and used to produce epoxy resin and polycarbonate. 4-tert-Butylphenol is monofunctional and so in polymer science terms, bisphenol A is a polymer chain extender but 4-tert-butylphenol is a chain stopper or sometimes called endcapper. It is thus use to control molecular weight by limiting chain growth.
4-tert-Butylphenol has an OH group and so it may be reacted with epichlorohydrin and sodium hydroxide to produce the glycidyl ether which is used in epoxy resin chemistry. This molecule has the CAS Registry number of 3101-60-8.
Laboratory reactions
Hydrogenation gives trans-4-tert-butylcyclohexanol.Controlled condensation with formaldehyde gives calixarenes.