Patent ID: 8262925

Claim:
A process for producing a phase change material composition, which is low-exudation, preferably exudation-free, is polymer-bound, and comprises phase change material, wherein the phase change material is liquefied, wherein the liquid phase change material is introduced at a temperature between 50° C. and 130° C., but at least 20° C. to 70° C. above the melting point of the phase change material, into an extruder into which the polymer is also introduced, said extruder having kneading, conveying and baffle elements, wherein the introduction of the phase change material into the extruder is undertaken downstream of the polymer in the direction of extrusion, the polymer used being LDPE, HDPE, LLDPE and/or a block-copolymer, and wherein PMMA (polymethyl methacrylate) is used to improve the in situ-effected polymer encapsulation of the PCM component and to improve mechanical performance and resistance to heat distortion.