(JP11265840-A)   NOVELTY - A cased electrochemical device in which the electrolytic solution is a quaternary salt of a compound having an alkyl-substituted amidine group and an organic solvent containing gamma-butyrolactone or propylene carbonate of which the case seal is a copolymer of isobutylene and isoprene vulcanized by an alkylphenol formalin resin.    USE - The electrochemical device is used with electronic devices    ADVANTAGE - Excess hydroxide ions generated by electrolysis of the electrolytic solution are consumed in a reaction with the alkyl substituted amidine group of the quaternary salt which reduces deterioration of the seal by alkali attack. The rubber sealed vulcanised by alkyl phenol formalin resin has superior heat stability and alkali resistance and is hard enough to compress sufficiently the lead wires. Taken together the two aspects serve to reduce leakage of electrolyte from the device, particularly under conditions of high temperature and humidity    (CN1229258-A)   NOVELTY - A cased electrochemical device in which the electrolytic solution is a quaternary salt of a compound having an alkyl-substituted amidine group and an organic solvent containing gamma-butyrolactone or propylene carbonate of which the case seal is a copolymer of isobutylene and isoprene vulcanized by an alkylphenol formalin resin.    USE - The electrochemical device is used with electronic devices    ADVANTAGE - Excess hydroxide ions generated by electrolysis of the electrolytic solution are consumed in a reaction with the alkyl substituted amidine group of the quaternary salt which reduces deterioration of the seal by alkali attack. The rubber sealed vulcanised by alkyl phenol formalin resin has superior heat stability and alkali resistance and is hard enough to compress sufficiently the lead wires. Taken together the two aspects serve to reduce leakage of electrolyte from the device, particularly under conditions of high temperature and humidity    (US6198622-B1)   NOVELTY - A cased electrochemical device in which the electrolytic solution is a quaternary salt of a compound having an alkyl-substituted amidine group and an organic solvent containing gamma-butyrolactone or propylene carbonate of which the case seal is a copolymer of isobutylene and isoprene vulcanized by an alkylphenol formalin resin.    USE - The electrochemical device is used with electronic devices    ADVANTAGE - Excess hydroxide ions generated by electrolysis of the electrolytic solution are consumed in a reaction with the alkyl substituted amidine group of the quaternary salt which reduces deterioration of the seal by alkali attack. The rubber sealed vulcanised by alkyl phenol formalin resin has superior heat stability and alkali resistance and is hard enough to compress sufficiently the lead wires. Taken together the two aspects serve to reduce leakage of electrolyte from the device, particularly under conditions of high temperature and humidity