Deltech Corporation operates site in Baton Rouge, LA. to manufacture, VT (Vinyl Toluene), PMS (para-Methylstyrene and other specialty monomers. The primary difference between PMS and VT is the methyl styrene isomer distribution. PMS contains 95% para isomer while VT is a mixture of the meta and para isomers. Methyl styrene monomers provide improved performance in resins for specialty paints, hydrocarbon resins for adhesives, specialty polymers and unsaturated polyester resins. Deltech introduced another specialty monomer, TBS (tertiary-Butylstyrene), in 1993. TBS is intended for advanced applications where low monomer volatility is important. TBS is used in high resilience coatings, adhesives and specialty copolymers.