As defined herein, a composition is soluble if it has a solubility of greater than 0.01 g per 100 ml of solution at 25??? C. [0044] In a further embodiment, the polyamide polymers can be chosen from polymers resulting from at least one polycondensation reaction between at least one acid chosen from dicarboxylic acids comprising at least 32 carbon atoms, such as 32 to 44 carbon atoms, and at least