Supersuperabsorbent polymers

A post crosslinked superabsorbent polymer comprising at least one partially neutralized, uncrosslinked, carboxyl-containing polysaccharide that is preswelled and dried and surface-post crosslinking the dried polycarboxypolysaccharide by means of a surface crosslinker, wherein the polycarboxypolysaccharide includes one or more water-soluble additives from the group consisting of base, salts and blowing agents or one or more anti-blocking additives from the group consisting of natural fiber materials, synthetic fiber materials, silica gels, synthetic silicas and water-insoluble mineral salts or any combination of at least two there from and wherein said post crosslinked superabsorbent polymer has an absorbency against pressure (AAP0.7) value of 12.5 g/g or more.

A post crosslinked superabsorbent polymer comprising at least one partially neutralized, uncrosslinked, carboxyl-containing polysaccharide that is preswelled and subsequently dried, wherein the polycarboxypolysaccharide is surface crosslinked by means of a surface crosslinker, wherein the surface crosslinker may be ionic or covalent crosslinkers or any combination of these post crosslinking.

An absorbent post crosslinked polymer comprising at least one partially neutralized, uncrosslinked, carboxyl-containing polysaccharide that is preswelled and subsequently dried and a post crosslinking surface crosslinker, wherein the surface post crosslinking utilizes ionic or covalent crosslinkers or a combination thereof, wherein the ionic surface crosslinkers are salts of at least divalent cations and the covalent surface crosslinkers are acid-functional substances, wherein the polyvalent cation is formed from the group consisting of Mg2+, Ca2+, Al3+, Ti4+, Fe3+,Fe2+, Zn2+, and Zr4+, and the acid-functional substances are formed from low molecular weight and polymeric polycarboxylic acids and wherein the absorbent post crosslinked polymer has an absorbency against pressure (AAP0.7)value of 16 g/g or more.

An absorbent post crosslinked polymer from a process comprising the steps of a) forming a hydrogel by mixing an uncrosslinked polycarboxypolysaccharide that is preswelled and subsequently dried with water;

• b) the hydrogel is mechanically comminuted and dried;
• c) the dried hydrogel is comminuted and classified to form a polymer particles;
• and d) the polymer particles are coated with a solution of a crosslinker and subjected to a surface post crosslinking and wherein the absorbent post crosslinked polymer has an absorbency against pressure (AAP0.7) value of 12.5 g/g/ or more.

Absorbent hygiene product comprising an superabsorbent polymer comprising at least one partially neutralized, uncrosslinked, carboxyl-containing polysaccharide that is preswelled and subsequently dried, wherein the dried polycarboxypolysaccharide is surface-post crosslinked by means of a surface crosslinker.

Absorbent hygiene product comprising an superabsorbent polymer comprising at least one partially neutralized, uncrosslinked, carboxyl-containing polysaccharide that is preswelled and dried and surface-post crosslinking the dried polycarboxypolysaccharide by means of a surface crosslinker, wherein the polycarboxypolysaccharide includes one or more water-soluble additives from the group consisting of bases, salts and blowing agents or one or more anti-blocking additives from the group consisting of natural fiber materials, synthetic fiber materials, silica gels, synthetic silicas and water-insoluble mineral salts or any combination of at least two there from and wherein the absorbent post crosslinked polymer has an absorbency against pressure (AAP0.7) value of 12.5 g/g or more.