| abstract |
Disclosed is a coating composition for a porous substrate, the coating composition including a solvent, inorganic particles, a dispersant, and a binder, wherein the binder includes a binder B("B") and a binder A("A"), both the B and the A include a VDF unit and a HFP unit, the HFP unit constitutes 8 to 50 wt% of the B and constitutes 5 wt% or more of the A under the condition that a proportion of the HFP unit in the A is 80% or less of a proportion of the HFP unit in the B, the B has a total Mof 200,000 to 2 million, and the A has a total Mcorresponding to 70% or less of that of the B, and a weight ratio of the A : the B in the coating composition is 0.1 to 10 : 1. |