Two-step mixing process for producing an absorbent polymer

摘要

A process for producing an absorbent polymer including a first mixing event, in which a plurality of absorbent polymer particles ( 1 ) are mixed with a liquid ( 2 ) and a second mixing event, in which the liquid ( 2 ) is homogenized within the interior of the polymer particles. The polymer particles ( 1 ) in the first mixing event are mixed with a speed such that the kinetic energy of the individual polymer particles ( 1 ) is on average larger than the adhesion energy of the individual polymer particles ( 1 ), and the polymer particles ( 1 ) in the second mixing event are stirred at a lower speed than in the first mixing event. The different speeds effect a fluidization of the polymer particles ( 1 ), which prevents a clumping of the polymer particles ( 1 ) during the mixing event. The absorbent polymers thus produced are distinguished by a particularly rapid swelling behavior.