ACTIVE SULFUR

Active sulfur refers to the sulfur content released from additive in the presense of copper power.

THERMAL STABILITY

Thermal behavior of additives is a good indicator of performance. Figures show that trisulfides (TPS20) present higher thermal stability than pentasulfides (TPS32).

ALKYL(R)MERCAPTAN
(RSH)
INACTIVE
SULFUR
ACTIVE
SULFUR
ODOR
C12tert-Dodecyl Mercaptan
(TDM)
TPS 20TPS 32Very Low
C4tert-Butyl Mercaptan
(TBM)
TPS 44 Medium

PRODUCTION PROCESS OF TERTIARY ALKYL POLYSULFIDE

TPS exhibits outstanding performances: low odor, light color, excellent solubility in a variety of base fluids, high sulfur content and high EP capacity. These properties stem from their unique manufacturing process starting from high purity mercaptans (RSH).

R-CR=CH₂ + H₂S R-SH
R-SH₂ + S R-Sx-R