Composition for heat-storage object formation, heat-storage object, and process for producing heat-storage object
A heat-storage object which can be formed in a desired shape, has a high heat-storage material content and hence excellent heat-storage property, undergoes no leakage with time despite the high heat-storage material content, and even when subjected to processing such as cutting or punching, does not undergoes leakage through the cut surface or hole, and has excellent processability, as well as a composition for heat-storage object formation, and a process for producing the same. The heat-storage object comprises fine particles of an organic latent heat-storage material (a), the particles having been fixed with a binder (c). It is produced by mixing a composition for heat-storage object formation containing an organic latent heat-storage material (a), a nonionic surfactant (b) and a compound (c-1) having reactive functional group, with a compound (c-2) having a second reactive functional group reactive with the reactive functional group, dispersing the organic latent heat-storage material (a) in a colloidal state, reacting the component (c-1) with the component (c-2) to form a binder (c), and fixing the organic latent heat-storage material (a) in the form of fine particles with the binder (c).
1. A composition for heat-storage object formation, comprising an organic latent heat-storage material (a), a nonionic surfactant (b), and a compound (c-1) having a reactive functional group, wherein
a hydrophile-lipophile balance (HLB) of the nonionic surfactant (b) is 12 or more, and
the compound (c-1) having a reactive functional group is a polyol.
2. The composition for heat-storage object formation according to claim 1 , further comprising an organically treated layered clay mineral (d).
3. The composition for heat-storage object formation according to claim 2 , wherein the organically treated layered clay mineral (d) is in an amount of 0.5 to 50 parts by weight based on 100 parts by weight of the organic latent heat-storage material (a).
4. The composition for heat-storage object formation according to claim 1 , wherein the nonionic surfactant (b) is polyoxyethylene sorbitan fatty acid ester.
5. A heat-storage object comprising an organic latent heat-storage material (a), a nonionic surfactant (b), and a binder (c), wherein
the organic latent heat-storage material (a) is in the form of fine particles fixed with the binder (c),
a hydrophile-lipophile balance (HLB) of the nonionic surfactant (b) is 12 or more,
the binder (c) is a product formed by reaction of a compound (c-1) having a reactive functional group with a compound (c-2) having a second reactive functional group reactive with the reactive functional group,
the compound (c-1) having the reactive functional group is a polyol, and
the compound (c-2) having the second reactive functional group is an isocyanate group-containing compound.
6. The heat-storage object according to claim 5 , further comprising an organically treated layered clay mineral (d).
7. The heat-storage object according to claim 6 , wherein the amount of the layered clay mineral (d) added is 0.5 to 50 parts by weight based on 100 parts by weight of the organic latent heat-storage material (a).
8. The heat-storage object according to claim 6 , wherein the organic latent heat-storage material (a) and the organically treated layered clay mineral (d) are in the form of fine particles fixed with the binder (c).
9. The heat-storage object according to claim 5 , wherein the content of the organic latent heat-storage material (a) is 40 wt % or more.
10. The heat-storage object according to claim 5 , wherein the binder (c) has a segment generating heat with microwaves.
11. The heat-storage object according to claim 5 , which is a cured product.
12. A heat-storage structure comprising the heat-storage object of claim 5 covered with a surface material.
13. The heat-storage object according to claim 5 , wherein the nonionic surfactant (b) is polyoxyethylene sorbitan fatty acid ester.
14. A heat-storage structure comprising the heat-storage object of claim 5 formed into a sheet, at least one side of which is laminated with a laminating material.
15. The heat-storage structure according to claim 14 , further comprising a heating element laminated therein.
16. The heat-storage structure according to claim 15 , further comprising a heat insulator laminated on the heating element.
17. The heat-storage structure according to claim 14 , wherein the laminating material is a flame-retardant or nonflammable material.
18. The heat-storage structure according to claim 14 , wherein the laminating material is a heat conductor.
19. The heat-storage structure according to claim 14 , wherein the laminating material is a heat insulator having a heat conductivity of less than 0.1 W/(m·K).
20. A process for producing a heat-storage object, which comprises:
mixing a composition for heat-storage object formation containing an organic latent heat-storage material (a), a nonionic surfactant (b) and a compound (c-1) having reactive functional group, with a compound (c-2) having a second reactive functional group reactive with the reactive functional group, wherein a hydrophile-lipophile balance (HLB) of the nonionic surfactant (b) is 12 or more, the compound (c-1) having the reactive functional group is a polyol, and the compound (c-2) having the second reactive functional group is an isocyanate group-containing compound;
dispersing the organic latent heat-storage material (a) in a colloidal state; and
reacting the component (c-1) with the component (c-2).
21. The process for producing a heat-storage object according to claim 20 , wherein the content of the organic latent heat-storage material (a) is 40 wt % or more.
22. The process for producing a heat-storage object according to claim 20 , wherein the composition further comprises an organically treated layered clay mineral (d).
23. The process for producing a heat-storage object according to claim 22 , wherein the organically treated layered clay mineral (d) is in an amount of 0.5 to 50 parts by weight based on 100 parts by weight of the organic latent heat-storage material (a).
24. The process for producing a heat-storage object according to claim 20 wherein the nonionic surfactant (b) is polyoxyethylene sorbitan fatty acid ester.