Patent ID: 7514139

Claim:
A fiber, sheet or textile which comprises an unfoamed or foamed, anionic group- containing polyurethane resin wherein said polyurethane resin has a protonic acid (salt) content of 0.01 to 7 millimoles/g and is obtained by reacting a polyol component with a polyisocyanate component; and said polyol component comprises at least 15 mole % of an anionic diol (A1) represented by the general formula: HO-A-OCO-Z[-Q − (M h+ ) 1/h ] n -COO-A-OH (1) in the formula, n represents an integer of 1 to 4; h represents 1 or 2; M h+ represents a cation with a valence of h; Q − represents an anion group of a protonic acid having a pKa of −10 to 4: Z represents the residue of a dicarboxylic acid (a1) having n protonic acid (salt) groups: and A represents the residue of at least one diol (a2) selected from the group consisting of hydrocarbon diols and (poly)oxyalkylene diols.