Method for producing a phase-change material composition
AssigneesRubitherm Technologies GmbH, Thueringisches Institut Fuer Textil-Und Kunststoff-Forschung E.V.
InventorsKlaus Fieback, Dirk Carsten Buettner, Angelo Schuetz, Stefan Reinemann
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Abstract
The invention relates to a method for producing a low-exuding preferably non-exuding polymer-bonded phase-change material composition containing phase-change material, characterized in that the phase-change material is liquefied, the liquid phase-change material is introduced into an extruder at a temperature of between 50° C. and 130° C., however at least 20° C. to 70° C. above the melting point of the phase-change material into which the polymer is also introduced, wherein the extruder comprises mixing transport and holder elements and the introduction of the phase-change material into the extruder in the extrusion direction is performed after the polymer.
Claims16
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.
A polymer-bound phase change material composition having a proportion of phase change material, a polymer in the form of LDPE, HDPE, LLDPE and block-copolymer, and a proportion of PMMA, the PMMA and the block-copolymer being present as a network structure and the phase change material being encapsulated within the network.
A polymer-bound phase change material composition having a proportion of phase change material, the polymer being LDPE, HDPE, and/or LLDPE and a block-copolymer, PMMA, and carbon nanotubes as additive, the PMMA and the block-copolymer being present as a network structure.
Dependencies are inferred from the claim text.