Patent ID: 8247108

Claim:
An alkaline primary battery comprising: a positive electrode containing at least one of manganese dioxide and nickel oxyhydroxide; a negative electrode containing zinc; a separator disposed between said positive electrode and said negative electrode; an alkaline electrolyte; a battery case for housing said positive electrode, said negative electrode, said separator, and said alkaline electrolyte; a sealing plate for sealing an opening portion of said battery case; a resin-made gasket disposed between said battery case and said sealing plate; and a negative electrode current collector inserted in said negative electrode and said gasket, wherein said battery case is electrically connected to said positive electrode, said sealing plate is electrically connected to said negative electrode, a sealing agent is disposed between an inner surface of said battery case and said gasket, said sealing agent comprises a mixture of a hot-melt resin with a weight average molecular weight of 1000 to 3000 and a softening point of 95 to 160° C., and polybutene with a number average molecular weight of 300 to 700 and a kinematic viscosity at 40° C. of 10 to 1000 mm 2 /S, and a mixing weight ratio of said hot-melt resin to said polybutene in said sealing agent is 20:80 to 60:40.