NOVELTY - An alkaline dry battery comprises: (i) a battery case accommodating a positive electrode, negative electrode, separator, and alkaline electrolyte; (ii) a sealing plate for sealing an opening of the battery case; and (iii) a sealing component disposed in between the battery case and the sealing plate. A sealant layer including a blown asphalt and polybutene is provided in between the battery case and the sealing component.    USE - As alkaline dry battery.    ADVANTAGE - The blown asphalt has an excellent resistance to oxidation and properties to maintain viscosity without solidification even after an application. Also, the polybutene has excellent tight-sealing characteristics and low temperature properties. The sealant layer including both of these has a combination of these characteristics and properties so that the battery has excellent resistance to leakage, even when nickel oxyhydroxide having strong oxidizing effect is used for a positive electrode. Also, since the sealant layer has an appropriate viscosity and excellent tight-sealing characteristics, the resistance to leakage under rigorous conditions, especially heat cycle conditions, can be drastically improved.    DETAILED DESCRIPTION - An alkaline dry battery comprises:    (i) a positive electrode (2) including manganese dioxide and nickel oxyhydroxide;    (ii) a negative electrode (3) including zinc;    (iii) a separator (4) disposed in between the positive electrode and the negative electrode;    (iv) an alkaline electrolyte;    (v) a battery case (1) accommodating the positive electrode, negative electrode, separator, and alkaline electrolyte;    (vi) a sealing plate (7) for sealing an opening of the battery case; and    (vii) a sealing component (5) disposed in between the battery case and the sealing plate.    A sealant layer including a blown asphalt and polybutene is provided in between the battery case and the sealing component. A weight ratio of the nickel oxyhydroxide relative to a total weight of the manganese dioxide and the nickel oxyhydroxide in the positive electrode is 0.2 - 0.8.    An INDEPENDENT CLAIM is also included for a method of producing an alkaline dry battery comprising    (a) accommodating a positive electrode including manganese dioxide and nickel oxyhydroxide and a separator in a battery case;    (b) applying a sealant including a blown asphalt, polybutene and an organic solvent to a part of the battery case where a sealing component is in close contact;    (c) forming a sealant layer by drying the sealant applied;    (d) accommodating a negative electrode including an alkaline electrolyte and zinc in the battery case; and    (e) sealing an opening of the battery case with a sealing plate and the sealing component interposing the sealant layer.    DESCRIPTION OF DRAWING(S) - The figure shows a front view of a partial cross-section of an alkaline dry battery of the invention.    Battery case (1)    Positive electrode (2)    Negative electrode (3)    Separator (4)    Sealing component (5)    Negative electrode current collector (6)    Sealing plate (7)    Outer jacket label (8)