| abstract |
PROCEDURE FOR THE PREPARATION OF A MISCIBLE MIXTURE OF SOLID NON-CROSSLINKED POLYMERS, ABLE TO ABSORB A SUFFICIENT QUANTITY OF WATER, PROVIDING A COMPOSITION COMPRISING AT LEAST 50% WATER BY WEIGHT. IT COMPRISES THE FOLLOWING OPERATIONS: FIRST, A FIRST COMPONENT IS PREPARED IN A PROPORTION BETWEEN 2 AND 95 PARTS BY WEIGHT, WHICH COMPRISES A WATER-INSOLUBLE HYDROPHOBIC POLYMER; SECOND, A SECOND COMPONENT IS PREPARED IN A PROPORTION BETWEEN 98 AND 5 PARTS BY WEIGHT, WHICH IS FORMED BY A HYDROPHILIC POLYMER OR BY A MONOMER CAPABLE OF FORMING A HYDROPHILIC POLYMER; AND FINALLY, BOTH COMPONENTS ARE MIXED AND PROPERLY TREATED TO FORM THE REQUESTED MIXTURE. OF APPLICATION IN THE FORMATION OF ARTICLES SUCH AS CONTACT LENSES. |