Title:
THERMAL STORAGE MATERIAL COMPOSITION AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/1994/018283
Kind Code:
A1
Abstract:
A thermal storage material composition mainly comprising (i) 85.0-99.5 parts by weight of an inorganic salt composition containing 1.5-2.5 mol of ammonium chloride and 10-27 mol of water per mole of sodium sulfate (in terms of anhydride), (ii) 0.5-15.0 parts by weight of a water-swellable cross-linked polymer or a water-soluble acrylic polymer, and (iii) 0.01-5.0 parts by weight of a surfactant with a polyoxyalkylene chain; and a process for producing said composition by polymerizing at least one monomer selected from among unsaturated carboxylic acids, organic unsaturated sulfonic acids, salts of these acids and acrylamide, and a polyfunctional monomer by using a polymerization initiator in the presence of sodium sulfate, ammonium chloride, water and a surfactant with a polyoxyalkylene chain. This composition has melting and freezing points both lying in the temperature range suitable for air conditioning and cooling, a suitable separation between the melting and the freezing points, and the stability of withstanding repeated melting and freezing in the long-term service.
Inventors:
SAITA KENJI (JP)
SUZUKI YUTAKA (JP)
SUZUKI YUTAKA (JP)
Application Number:
PCT/JP1994/000203
Publication Date:
August 18, 1994
Filing Date:
February 10, 1994
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
SAITA KENJI (JP)
SUZUKI YUTAKA (JP)
SAITA KENJI (JP)
SUZUKI YUTAKA (JP)
International Classes:
C09K5/06; (IPC1-7): C09K5/06
Foreign References:
| JPS6225188A | 1987-02-03 | |||
| JPH0260986A | 1990-03-01 | |||
| JPS62109885A | 1987-05-21 |
Other References:
See also references of EP 0638624A4
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