US-20260125591-A1 - INORGANIC LATENT HEAT STORAGE MATERIAL COMPOSITION AND USE THEREOF

Abstract

An inorganic latent heat storage material composition having high thermal stability is provided. The inorganic latent heat storage material composition contains calcium chloride hexahydrate and a metal soap including strontium ions and anions derived from fatty acids.

Inventors

• Tomoharu Asano

Assignees

• KANEKA CORPORATION

Dates

Publication Date

20260507

Application Date

20251223

Priority Date

20230704

Claims (16)

1. 1 . An inorganic latent heat storage material composition comprising: calcium chloride hexahydrate; a melting point adjusting agent; and a metal soap comprising strontium ions and anions derived from fatty acids.
2. 2 . The inorganic latent heat storage material composition of claim 1 , wherein the melting point adjusting agent comprises an inorganic salt selected from the group consisting of a bromide salt, a chloride salt, and combinations thereof.
3. 3 . The inorganic latent heat storage material composition of claim 2 , wherein the melting point adjusting agent further comprises a lower alcohol having 5 or less carbon atoms.
4. 4 . The inorganic latent heat storage material composition of claim 1 , wherein the melting point adjusting agent comprises a lower alcohol having 5 or less carbon atoms.
5. 5 . The inorganic latent heat storage material composition of claim 1 , wherein the fatty acids are at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid, and stearic acid.
6. 6 . The inorganic latent heat storage material composition of claim 1 , wherein an amount of the metal soap comprised in 100% by weight of the inorganic latent heat storage material composition is from 0.01% by weight to 0.10% by weight.
7. 7 . The inorganic latent heat storage material composition of claim 1 , wherein the metal soap is obtained by reacting an aqueous solution comprising a strontium salt and an aqueous solution comprising a water-soluble metal salt of the fatty acids.
8. 8 . The inorganic latent heat storage material composition of claim 7 , wherein the water-soluble metal salt is at least one selected from the group consisting of sodium salts and potassium salts.
9. 9 . The inorganic latent heat storage material composition of claim 1 , further comprising a cellulose derivative.
10. 10 . A heat storage material comprising the inorganic latent heat storage material composition of claim 1 .
11. 11 . A transport container comprising the heat storage material of claim 10 .
12. 12 . A method for producing an inorganic latent heat storage material composition, the method comprising any one of the following mixing steps (A) to (C): the mixing step (A) of mixing calcium chloride hexahydrate and a metal soap comprising strontium ions and anions derived from fatty acids; the mixing step (B) of mixing a dispersion liquid comprising a metal soap comprising strontium ions and anions derived from fatty acids, and at least one selected from the group consisting of calcium chloride anhydride, calcium chloride dihydrate, and calcium chloride tetrahydrate; and the mixing step (C) of mixing a metal soap comprising strontium ions and anions derived from fatty acids, water, and at least one selected from the group consisting of calcium chloride anhydride, calcium chloride dihydrate, and calcium chloride tetrahydrate.
13. 13 . The method of claim 12 , further comprising, prior to the mixing step (B), a dispersion liquid preparing step of preparing the dispersion liquid comprising the metal soap, by reacting an aqueous solution comprising a strontium salt and an aqueous solution comprising a water-soluble metal salt of the fatty acids, wherein, in the mixing step (B), the dispersion liquid prepared in the dispersion liquid preparing step, and the at least one selected from the group consisting of calcium chloride anhydride, calcium chloride dihydrate, and calcium chloride tetrahydrate are mixed.
14. 14 . The method of claim 12 , wherein the mixing steps (A) to (C) further comprise mixing a melting point adjusting agent.
15. 15 . The method of claim 12 , wherein the mixing steps (A) to (C) further comprise mixing an inorganic salt selected from the group consisting of a bromide salt, a chloride salt, and combinations thereof.
16. 16 . The method of claim 12 , wherein the mixing steps (A) to (C) further comprise mixing a lower alcohol having 5 or less carbon atoms.

Description

TECHNICAL FIELD One or more embodiments of the present invention relate to an inorganic latent heat storage material composition and use thereof. BACKGROUND In recent years, from an environmental perspective, active research and development have been conducted in the technical field of building materials so as to more effectively utilize thermal energy etc. generated during indoor heating. Some reactive substances, such as adhesives, precision instruments, semiconductors, pharmaceuticals, investigational drugs, and specimens may be handled within a given range of temperatures (hereinafter may be referred to as “control temperature”). Such articles may also be each referred to as “temperature control target article”. In a case where a temperature control target article is transported or stored, it is preferable to keep the temperature control target article cold or warm within the range of control temperatures for a given period of time. Conventionally, several latent heat storage material compositions (may also be referred to as “phase change materials (PCM)”) have been developed which are suitable to (i) be applied to wall materials, floor materials, ceiling materials, etc. and/or (ii) store or transport, at constant or substantially constant temperatures, temperature control target articles that require temperature control at control temperatures exceeding 0° C. For example, inorganic latent heat storage material compositions disclosed in Patent Documents 1 and 2 are known. PATENT LITERATURE Patent Literature 1 International Publication No. WO 2022/158484 Patent Literature 2 Japanese Patent Application Publication Tokukai No. 2021-143304 Conventional inorganic latent heat storage material compositions as described above still have room for improvement from the perspective of thermal stability. SUMMARY One or more embodiments of the present invention have been made in view of the above to provide an inorganic latent heat storage material composition having high thermal stability. As a result of conducting diligent studies, the inventors of the present invention completed one or more embodiments of the present invention. That is, an inorganic latent heat storage material composition in accordance with one or more embodiments of the present invention is an inorganic latent heat storage material composition containing: calcium chloride hexahydrate; and a metal soap which is composed of strontium ions and anions that are derived from a fatty acid. A method for producing an inorganic latent heat storage material composition in accordance with one or more embodiments of the present invention is a method for producing an inorganic latent heat storage material composition, the method including any one of the following mixing steps (A) to (C): the mixing step (A) of mixing calcium chloride hexahydrate and a metal soap which is composed of strontium ions and anions that are derived from a fatty acid;the mixing step (B) of mixing a dispersion liquid containing a metal soap which is composed of strontium ions and anions that are derived from a fatty acid and at least one selected from the group consisting of calcium chloride anhydride, calcium chloride dihydrate, and calcium chloride tetrahydrate; andthe mixing step (C) of mixing a metal soap which is composed of strontium ions and anions that are derived from a fatty acid, water, and at least one selected from the group consisting of calcium chloride anhydride, calcium chloride dihydrate, and calcium chloride tetrahydrate. In one or more embodiments of the present invention, it is possible to provide an inorganic latent heat storage material composition having high thermal stability. BRIEF DESCRIPTION OF THE DRAWINGS 201 of FIG. 1A is a perspective view schematically illustrating an example of a heat storage material in accordance with one or more embodiments of the present invention. 202 of FIG. 1B is an exploded perspective view schematically illustrating an example of a transport container in accordance with one or more embodiments of the present invention. 301 of FIG. 2A is a perspective view schematically illustrating the inside of the transport container in accordance with one or more embodiments of the present invention. 302 of FIG. 2B is a cross-sectional view schematically illustrating a cross section taken along the line A-A in 301 of FIG. 2A. DETAILED DESCRIPTION The following description will discuss one or more embodiments of the present invention. The present invention is not, however, limited to these embodiments. The present invention is not limited to the configurations described below, but may be altered in various ways within the scope of the claims. The present invention also encompasses, in its technical scope, any embodiments or example derived by combining technical means disclosed in differing embodiments or examples. Further, it is possible to form a new technical feature by combining technical means disclosed in any embodiments. All academic