MATERIAL FOR FORMATION OF SEAL FOR BATTERY ELECTROLYTE

摘要

A material for formation of seal for battery electrolyte, the seal used at an electrode part of nickel hydrogen battery, which material comprises an EPDM composition containing a peroxide crosslinkable EPDM and an organic peroxide. In this material, the EPDM composition is preferably composed of 100 pts.wt. of peroxide crosslinkable EPDM, 10 to 150 pts.wt. of filler and 1 to 8 pts.wt. of organic peroxide. The seal formation material can be further loaded with 40 pts.wt. or less of hydrocarbon oil. The seal material formed from this battery electrolyte seal formation material exhibits satisfactory resistance to a potassium hydroxide based battery electrolyte, realizes prolonged service life and is not deteriorated when exposed to current passage at an electrode part of nickel hydrogen battery.