| abstract |
THE AGENT ACCORDING TO THE INVENTION INCLUDES A RESIN MADE INSOLUBLE IN WATER OF A POLYMER OF AT LEAST ONE MONOMER CHOSEN FROM N-ALCOYL- OR N-ALCOYLENE-SUBSTITUTED ACRYLAMIDES OR METHACRYLAMIDES, OF FORMULA: (CF DRAWING IN BOPI) IN WHICH R AND R ARE EACH H OR CH, AND R IS CH, CH OR CH, PROVIDED THAT R IS CH OR CH WHEN R IS H AND R IS CH OR CH WHEN R IS CH, OR R AND R ARE TOGETHER (CH) OR (CH) 0) CH), OR OF A COPOLYMER OF AT LEAST ONE MONOMER CHOSEN BY ACRYLAMIDES OR METHACRYLAMIDES AND ANOTHER COPOLYMERISABLE MONOMER, THE RESIN HAVING A CAPACITY OF WATER ABSORPTION THE DEGREE OF WHICH VARIES WITH THE TEMPERATURE AND, WHEN HEATED, SUBJECTS A CONTRACTION EVEN IN THE PRESENCE OF A HIGH EXCESS WATER TO RELEASE THE WATER ONCE ABSORBED. THIS AGENT CAN BE USED TO REMOVE WATER FROM A SYSTEM, TO ADJUST THE CONCENTRATION OF A MACROMOLECULAR SUBSTANCE. |