  In this paper we consider the 14 moments model of Extended Thermodynamics for
dense gases and macromolecular fluids. Solutions of the restrictions imposed by
the entropy principle and that of Galilean relativity for such a model have
been until now obtained in literature only in an approximate manner up to a
certain order with respect to thermodynamic equilibrium; for more restrictive
models they have been obtained up to whatever order, but by using Taylor
expansions around equilibrium and without proving convergence. Here we have
found an exact solution without using expansions. The idea has been to write
firstly a relativistic model, for which it is easy to impose the Einsteinian
relativity principle, and then taking its non relativistic limit.
