SUBSTRATE COATED WITH A FLUOROCARBON POLYMER AND A THERMOPASTIC AROMATIC POLYETHER SULPHONE IN AQUEOUS DISPERSION

摘要

Substrates are coated with a composition comprising a low molecular weight polyethersulphone containing hydroxyl and groups and having a reduced viscosity of less than 0.25 (as measured at 25 DEG C on a solution of the polymer in dimethyl formamide containing 1 g of polymer in 100 cm3 of solution) and a fluorocarbon polymer dispersed in an aqueous medium, drying the coating and thereafter baking it in air at 420 to 450 DEG C.