Patent ID: 8691201

Claim:
A method of removing the odor of nonenal, comprising contacting nonenal with a deodorant material comprising a polyurethane fiber, wherein the glass transition point (Tg) of the polyurethane fiber is −100 to 0° C. and the polyurethane fiber comprises the reaction product of a polymer diol, a diisocyanate, and as a chain extender, a diamino compound or a low molecular weight diol, wherein the polyurethane fiber is effective to remove nonenal odor, wherein the polymer diol is a copolymerized diol compound comprising formula (I): wherein a and c is an integer of 1 to 3, b is an integer of 0 to 3, and R3 and R4 each are a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; the diisocyanate is selected from the group consisting of diphenylmethane diisocyanate, tolylene diisocyanate, 1,4-diisocyanate benzene, xylylene diisocyanate, 2,6-naphthalene diisocyanate, methylenebis(cyclohexyl isocyanate), isophorone diisocyanate, methylcyclohexane-2,4-diisocyanate, methylcyclohexane-2,6-diisocyanate, cyclohexane-1,4-diisocyanate, hexahydroxylylene diisocyanate, hexahydrotolylene diisocyanate, and octahydro-1,5-naphthalene diisocyanate; the diamino compound is selected from the group consisting of ethylenediamine, 1,2-propanediamine, 1,3-propanediamine, hexamethylenediamine, p-phenylenediamine, p-xylylenediamine, m-xylylenediamine, p,p′-methylenedianiline, 1,3-cyclohexyldiamine, hexahydro-meta-phenylenediamine, 2-methylpentamethylenediamine, and bis(4-aminophenyl)phosphine oxide; the low molecular weight diol is selected from the group consisting of ethylene glycol, 1,3-propanediol, 1,4-butanediol, bishydroxyethoxy benzene, bishydroxyethylene terephthalate, and 1-methyl-1,2-ethane diol; and the concentration of urethane group in a polyurethane constituting the polyurethane fiber is about 0.2 to 3.5 mol/kg.