A method for preparing an open pourous polymer material, comprises forming
of a polymer solution, addition of a porogen to the polymer solution and
precipitation with water of polymer from the polymer solution, and the
method then comprises removal of solvent and porogen from the polymer
material wherein the precipitation is homogenous through that the water
is in form of crystal water and that the crystal water is bonded to the
porogen, wherein the porogen is a sugar hydrate. An open porous polymer
material, a mixture comprising a sugar hydrate and a polymer solution,
and a designed material, and uses thereof are also disclosed.