C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 5/06 (2006.01)
Patent
CA 2215906
The present invention relates to reversible liquid/solid phase change compositions comprising MgCl2.6H2O and one or more phase equilibrium modifying additives wherein the additive is added in an amount effective to modify the semi-congruent melting behavior of the hydrated salt by reducing the formation of crystalline salt phases other than the starting hydrate during melting of the material. Optionally, the compositions of the invention also contain nucleating additives to modify and suppress the supercooling properties of the liquid phase of the phase change compositions.
L'invention concerne des compositions réversibles à changement de phase liquide/solide, qui contiennent MgCl¿2?.6H¿2?O et un ou plusieurs additifs modifiant l'équilibre des phases. On ajoute les additifs en quantité suffisante pour modifier les caractéristiques de fusion semi-congruente du sel hydraté en réduisant la formation des phases de sel cristallin autre que celles de l'hydrate de démarrage pendant la fusion du matériau. Eventuellement, les compositions selon l'invention peuvent aussi contenir des additifs de nucléation de sorte que les propriétés de surfusion de la phase liquide des compositions à changement de phase soient modifiées et supprimées.
Hammond Michael J.
Lane George A.
Rossow Harold E.
Dow Global Technologies Inc.
Smart & Biggar
The Dow Chemical Company
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