HEAT-RESISTANT SYNTHETIC RESIN MICROPOROUS FILM, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY SEPARATOR, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND PROCESS FOR PRODUCING SAID HEAT-RESISTANT SYNTHETIC RESIN MICROPOROUS FILM

摘要

PROBLEM TO BE SOLVED: To provide a heat-resistant synthetic resin microporous film that is excellent in heat-resistant property as well as contacts with an electrolyte and suppresses the dimensional change and prevents the occurrence of wrinkles, and a process for producing the same.SOLUTION: The heat-resistant synthetic resin microporous film of the present invention includes a synthetic resin microporous film and a coating layer formed on at least a part of the surface of the synthetic resin microporous film, and in which, characterized, said coating layer contains a polymerizable compound having an SP value of 10 to 15.5 (cal/cm)and thereby the dimensional change rate when immersed in an electrolyte is 0.8% or less.SELECTED DRAWING: None