| abstract |
And a heat resistant layer positioned on at least one surface of the porous substrate, wherein the heat resistant layer includes a first acrylic binder, a second acrylic binder, and a filler, wherein the first acrylic binder is (meth) acrylate or ( Meta) acrylic acid-derived unit, a cyano group-containing unit and a sulfonate group-containing unit, wherein the second acrylic binder is a secondary battery separator having a glass transition temperature of 20 ℃ to 100 ℃ and a lithium secondary battery comprising the same It is about. |