Abstract: A heat-storage agent which can store a large quantity of cold heat in the temperature range of 3-5° C., is highly effective in preventing supercooling, and can retain the supercooling-preventing effect even when hydrate solidification/melting is frequently repeated. Also provided are an aqueous solution which enables the formation of a clathrate hydrate serving as a major component of the heat-storage agent, and a process for producing the clathrate hydrate. The aqueous solution contains at least one of tetra-n-butylammonium bromide and tri-n-butyl-n-pentylammonium bromide as a solute and contains tetraisopentylammonium bromide as a supercooling inhibitor, the weight proportion of the tetraisopentylammonium bromide to the tetra-n-butylammonium bromide and/or tri-n-butyl-n-pentylammonium bromide being in a given range. This aqueous solution is cooled to or below a hydrate formation temperature to thereby produce a clathrate hydrate. The heat-storage agent contains this clathrate hydrate as a major component.

Abstract: A latent heat storage material including a clathrate hydrate including, as its guest compound or guest compounds, a salt containing at least one of primary phosphate ion (H2PO4?), secondary phosphate ion (HPO42?) and tertiary phosphate ion (PO43?), and a pH regulator.

Abstract: An aqueous solution containing a quaternary ammonium salt as a guest compound of a clathrate hydrate, having a property of producing the clathrate hydrate when cooled, and further containing a phosphate of an alkali metal added thereto. A clathrate hydrate produced by cooling an aqueous solution containing a quaternary ammonium salt and a phosphate of an alkali metal, wherein the quaternary ammonium salt is the guest compound.

Abstract: The present invention provides a heating apparatus that displays a high heating efficiency and a long product life. In addition, present invention provides a heating apparatus that has no limitations with respect to the materials comprising its heat insulating material, which displays an even greater product life and, moreover, can be manufactured easily at low cost.

Abstract: The present invention provides a heating apparatus that displays a high heating efficiency and a long product life. In addition, present invention provides a heating apparatus that has no limitations with respect to the materials comprising its heat insulating material, which displays an even greater product life and, moreover, can be manufactured easily at low cost.

Abstract: A ceramics green sheet which is suitably used for producing sintered ceramics substrates and the like is disclosed. The ceramics green sheet according to the present invention includes a ceramics powder, a photoinitiator, a UV absorber such as photoinitiation inhibitor organic dyes and inorganic powders, and a photosensitive resin composition. The ceramics green sheet according to the present invention has an advantage that via holes and through holes may be very easily formed with high precision, and fine holes may be formed reliably and inexpensively.

Abstract: The present invention relates to a graphic arts film obtained by forming a toner image on a light-transmitting base sheet having a toner-adhesive and ink-repellent coating layer, then fixing the toner image and applying ink onto the surface of the base sheet to thereby selectively enhance the optical density of the toner image area on the coating layer, and a method of preparing the same.The present invention permits easy and inexpensive production of a graphic arts film having a sufficiently enhanced optical density, free from pin-holes and capable of being retouched with respect to the image formed thereon.

Abstract: Provided is a dry planographic printing plate containing on a base substrate a mixture which mixture comprises an organopolysiloxane; an alkoxy silane as a cross-linking agent represented by the formula R.sub.4-a-b R'.sub.a Si(OR").sub.b wherein a is 0 or 1, b is 2 or 3 and a+b is at most 3, R is an organic group containing a polar group or double bond and OR" is an alkoxy group; and a compound as a cross-linking catalyst represented by the formula (R.sup.1 O)(R.sup.2 O)(R.sup.3 O)(R.sup.4 O)M wherein M is titanium or zirconium, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each an organic group.