LIQUID-ABSORBING POLYMERS AND METHOD OF THEIR SYNTHESIS Russian patent published in 2002 - IPC

FIELD: polymers. SUBSTANCE: invention describes cross-linked polymer absorbing aqueous liquid comprising of partially neutralized monomers containing monoethylene-unsaturated acidic groups. Polymer is synthesized by using mixture of cross-linking agent with monomer from I. cross-linking agent, II. monomer, III. cross-linking agent and/or di-, respectively, triallylamine and/or bis-acrylamide where R¹ means polyatomic C_2-10-alkyl; R² means direct or branched C_2-10-alkenyl; R³ means H, CH₃, C₂H₅; R⁴ means H, direct or branched C_1-10-alkyl; R⁵ means CO, CH₂; R⁶ means H, CH₃; x has value from 2 to 6; u has value from 0 to 15; v has value from 1 to 45; z has value from 3 to 20. Also, invention describes method of synthesis of cross-linked polymer absorbing aqueous liquids. Synthesized polymers show retentivity capacity at high absorption degree under pressure. EFFECT: improved method of synthesis, valuable properties of polymers. 18 cl, 7 tbl