Cooling agent

Details Cooling agent Cooling agent

1993-12-30

1995-07-04

Bell, Mark L.

Compositions

Frost-preventing, ice-thawing, thermostatic, thermophoric,...

62 4, C09K 500, A61F 710

Patent

active

054297621

ABSTRACT:
A cooling agent which cools by an endothermic reaction resulting from the dissolving of crystals of inorganic salts water, the salts crystallizing at about room temperature by supplying heat. The cooling agent comprises a mixture of (i) a sodium phosphate salt, (ii) a sodium ammonium phosphate salt or an ammonium phosphate salt, and (iii) water. The cooling agent is produced in a manner which avoids the conglomeration of the crystals, which was a difficulty in the art. Moreover, the cooling agent of the present invention can be used repeatedly. When a nucleating agent, a highly water absorbent polymer or a thickener is added to the cooling agent, the precipitation of the crystals occurs in a still finer and stabler state. The cooling agent can be used in a cooling pillow having a desirable cooling property and a soft and agreeable touch, which offers comfort with safety and which is free from conglomeration of crystals, even after a long period of time.

REFERENCES:
patent: 3977202 (1976-08-01), Forusz et al.
patent: 5261241 (1993-11-01), Kitahara et al.
Patent Abstracts of Japan, vol. 15, No. 31 (C-0798), 24 Jan. 1991, of JP-A-22 069 180, 2 Nov. 1990.
Patent Abstracts of Japan, vol. 14, No. 220 (C-0717), 10 May 1990, of JP-A-20 051 581, 21 Feb. 1990.
Patent Abstracts of Japan, vol. 6, No. 68 (C-100), 30 Apr. 1982, of JP-A-57 005 784, 12 Jan. 1982.

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