The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 1983
Filed:
Sep. 21, 1981
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The heat accumulating material provided according to this invention makes use of the latent heat of fusion of sodium acetate trihydrate, and it comprises, as blended in a system consisting of sodium acetate and water, at least one nucleation catalyst selected from the group of compounds consisting of tetrasodium pyrophosphate, trisodium monohydrogenpyrophosphate, disodium dihydrogenpyrophosphate and monosodium trihydrogenpyrophosphate. In use of this heat accumulating material, the sodium acetate trihydrate would not be overcooled owing to the overcooling preventing function of the nucleation catalyst but is unfailingly crystallized at a temperature close to the fusion point thereof to radiate latent heat of fusion. The overcooling preventing performance of the nucleation catalyst is not deteriorated even if it is subjected to more than 1,000 cycles of repetition of fusion and solidification, and thus the heat accumulating material maintains a very stabilized heat absorbing and radiating capacity.