Phase change material (PCM) compositions for thermal management
AssigneesE. I. Du Pont de Nemours and Company, Dupont de Nemours (Luxembourg) SARL
InventorsLoic Pierre Rolland, Raymond Joseph Reisdorf
Life of this patent
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Abstract
The present invention relates to a Phase Change Material (PCM) composition comprising a) from 20 to 80 wt % of a PCM; and b) from 20 to 80 wt % of one or more polymers chosen from the group consisting of b1) Very Low Density Polyethylene (VLDPE) having a density equal or lower than 0.910 g/cm3 measured according to ASTM 792; b2) Ethylene Propylene Rubber (EPR) having a density equal or lower than 0.900 g/cm3 measured according to ASTM 792; b3) Styrene Ethylene Butadiene Styrene (SEBS) copolymers; and b4) Styrene Butadiene Styrene (SBS) copolymers. The PCM composition of the present invention can be used in applications where thermal management is needed, like for example in building, automotive, packaging, garments and footwear.
Claims13
A process for preparing a flexible phase change material (PCM) composition having an amorphous polymer matrix comprising:
- a) from 50 to 70 wt % of one or more alkyl hydrocarbons;
- and
- b) from 30 to 50 wt % of at least one amorphous ethylene propylene rubber having a density equal to or lower than 0.900 g/cm3;
- the weight percentages of said alkyl hydrocarbons and said at least one ethylene propylene rubber being based on the total weight of the PCM composition, the process comprising the step of blending said one or more alkyl hydrocarbons and said at least one amorphous ethylene propylene rubber at a temperature above the melting point of the alkyl hydrocarbon and below 30° C. for a time sufficient to incorporate the total amount of the one or more alkyl hydrocarbons within the polymer matrix.
Dependencies are inferred from the claim text.