  We extend the Boltzmann equation in the relaxation time approximation to
explicitly include transitions between particles forming an interacting
mixture. Using the detailed balance condition as well as conditions of
energy-momentum and current conservation, we show that only two independent
relaxation time scales are allowed in such an interacting system. Dissipative
hydrodynamic equations and the form of transport coefficients is subsequently
derived for this case. We find that the shear and bulk viscosity coefficients,
as well as the baryon charge conductivity are independent of the transition
time scale. However, the bulk viscosity and conductivity coefficients that can
be attributed to the individual components of the mixture depend on the
transition time.
