| abstract |
Water- and oil-repellent surface and moisture-permeable surface with good water and oil repellency and washing durability, with reduced penetration of coating liquid to form a moisture permeable waterproof membrane, and with reduced peeling of moisture permeable waterproof membrane A porous substrate having a waterproof membrane can be obtained. Copolymer (A) having 60 to 95% by mass of units based on monomers having 6 or less R F groups and 5 to 40% by mass of units based on vinylidene chloride, and units based on halogenated olefins A copolymer (B) having a unit based on a monomer having a functional group capable of crosslinking and 50 to 95% by mass and a crosslinkable functional group, and a medium (C), A water / oil repellent composition having a ratio of 70 to 90% by mass and a ratio of the copolymer (B) of 10 to 30% by mass. |