| abstract |
TO THE USUAL COMPOUNDS INVOLVED IN MAKING A FLEXIBLE OPEN-CELL POLYURETHANE FOAM BY THE SO-CALLED "ONE-SHOT" METHOD THERE ARE ADDED, FROM 5 TO 30% BY WEIGHT, IN RELATION TO THE AMOUNT OF POLYOL THAT IS USED, AT LEAST ONE WATER INSOLUBLE CARBOXYMETHYL CELLULOSE OR A WATER SOLUBLE CARBOXYMETHYL CELLULOSE SALT ABLE TO PRODUCE, BY CATION EXCHANGE DURING OR AFTER FORMATION OF THE FOAM, AN INSOLUBLE SALT, TO THEREBY PRODUCE A POLYURETHANE FOAM HAVING IMPROVED HYDROPHILIC PROPERTIES. |