a film foil or other flexible substrate to give a coating weight of about 1 to 2 pounds especially 1 1 5 per 3000 square yards of substrate surface the coated substrate is dried to remove substantially all the water the tacky surface is then bonded to a second same or different substrate by application of pressure to give good contact into a three neck flask provided with a thermometer mechanical stirrer and drying tubes was placed 63 grams of 34 desmodur w 34 diisocyanate mobay 197 g of 34 ed 3000 34 diol witco a drop of dibutyltin dilaurate then 20 ml of 34 m pyrole 34 solvent were added the contents were heated to 80 u00b0 c for an hour and 17 2 g of dimethylol propionic acid were added plus another drop of dbtdl after which the heating was continued for 5 5 hours at the end of this reaction period 12 9 g of triethylamine were added and stirring was continued for 15 minutes to form the ionomer the resulting ionomer was slowly added over a period of 15 minutes to a vigorously stirred solution of 5 4 g of 30 hydrogen peroxide dissolved in 500 ml of water the stirring was continued.