| 摘要 |
PURPOSE:To restrict the lowering of heat accumulating amount by a method wherein a specified highly water-susceptible resin is added, as a thickening agent, to the heat accumulating agent consisting of the principal constituent of a hydrated salt, whose positive ion consists of only monovalent ion, or the eutectic substance thereof. CONSTITUTION:In the heat accumulating agent consisting of the hydrated salt, whose positive iron is consisting of monovalent ion only, or the eutectic substance thereof, most of which are showing non-harmonized melting when it is molten, the highly water-susceptible resin, containing a polymer in which a part of carboxyl group obtained from partially neutralized acrylic acid are bridged mutually, is added as the concentration increasing agent, and thereby restricting the deterioration of the heat accumulating amount. Further, a closslinker is added to develop a closslinking reaction in order to improve the age stability or water absorbing speed thereof. Ethylene glycol diglycidyl ether is suitable as the closslinker. The thickening agent is added within a range of 1-5pts.wt. with respect to the 100pts.wt. of the hydrated salt or the eutectic substance thereof and preferably it is within the range of 1.5-3pts.wt. |
