BINDER DISPERSION FOR NON-AQUEOUS SECONDARY BATTERY SEPARATOR, SLURRY COMPOSITION, NON-AQUEOUS SECONDARY BATTERY SEPARATOR, AND NON-AQUEOUS SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Mar 23, 2022
filing date -
May 31, 2021
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Abstract
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.
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