| 摘要 |
PURPOSE:To increase the resistance to liquid leakage of an alkaline battery by laying a film made of a given thiocyanuric-acid derivative on the copper surface of a negative collector which touches a gasket. CONSTITUTION:A positive mixture and a separator 2 are packed into a positive- electrode can 5. A negative collector 6 is filled with a negative agent 4 made of zinc, which is placed on the separator 2. At the same time, a gasket 7 is interposed between the positive-electrode can 5 and the negative collector 6 to hermetically close the battery, thus constituting a button-type battery. The negative collector 6 of such a battery has a curved end 11 and is prepared from, for example, a clad plate which has an inner layer made of either copper or a copper alloy. In additon to that, a surface 12 of the copper layer 10 which touches the gasket 7 is provided with a film 13. The film 13 is formed of a thiocyanuric-acid derivative whose general formula is indicated by (I). Here, in the formula (I), R1 represents -SM or the like; both M1 and M2, sodium, potassium, hydrogen or an amino group. In addition, at least one of M1 and M2 should be either sodium or potassium. |
