Patent ID: 7718713
Filing Date: 2010-05-18
Classification: C08F

Abstract:
1. A method of manufacturing super-absorbent polymer (SAP) which is powdery, insoluble in water, and able to absorb water, blood and urine with slight soluble substances, the method includes at least the following steps: mixing an acidic monomer solution having at least 50 mol % of neutralized acrylic acid with polymerization initiators to synthesize a sticky precursor, wherein the acidic monomer is selected from the group consisting of acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and any mixtures thereof, and the synthesis of the precursor is conducted at temperature of 5-80° C. for 0.5-16 hours; mixing long chain polyatomic epoxy compounds and polymerization initiators with the precursor and producing a gel via UV cross-linking; the polymerization via UV cross-linking is completed in 10-300 seconds; grinding and screening said polymer into constant particle size in a range of 0.05 to 1 mm; in response of the grinding and screening, drying the gel at temperature of 100 to 250° C. to obtain a polymer; coating the polymer with surface cross-linking agents; heating the polymer at temperature of 80 to 230° C.; and adding powdery inert inorganic salts into the polymer.