BINDER DISPERSION FOR NON-AQUEOUS SECONDARY BATTERY SEPARATOR, SLURRY COMPOSITION, NON-AQUEOUS SECONDARY BATTERY SEPARATOR, AND NON-AQUEOUS SECONDARY BATTERY

A binder dispersion having excellent electrolytic solution resistance, a slurry composition having excellent solution stability and coatability, a separator being low in water content and having excellent heat resistance and adhesion to a separator substrate, and a non-aqueous secondary battery havi...

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Hauptverfasser: SAKAI, Yoshiyuki, KOIKE, Takaaki, CHOU, Airei, IMAZATO, Akiko, FUJIKAWA, Daisuke
Format: Patent
Sprache:eng
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Zusammenfassung:A binder dispersion having excellent electrolytic solution resistance, a slurry composition having excellent solution stability and coatability, a separator being low in water content and having excellent heat resistance and adhesion to a separator substrate, and a non-aqueous secondary battery having low internal resistance and good cycle characteristics. An object thereof is to be attained by using a binder dispersion for a non-aqueous secondary battery separator, the binder dispersion including a polymer and an aqueous medium, in which the polymer has an acid value of 15 mgKOH/g or less and is an ethylenically unsaturated monomer mixture containing (meth)acrylamide and a nonionic ethylenically unsaturated monomer with a specific value for an octanol/water partition coefficient logarithm (Log Kow) at 25° C., and light transmittance at a wavelength of 400 nm is less than 70% under a condition of a solid concentration of 5% by mass.