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A hydrophile polyurethane foam prepared from a hydrophile polyol, a polyisocyanate in which NCO groups are not directly bonded to an aromatic ring, a surface active agent, a swelling agent and a catalyst comprising: (A) at least one compound selected from the group consisting of: (1) diazabicyclo-al

A hydrophile polyurethane foam prepared from a hydrophile polyol, a polyisocyanate in which NCO groups are not directly bonded to an aromatic ring, a surface active agent, a swelling agent and a catalyst comprising: (A) at least one compound selected from the group consisting of: (1) diazabicyclo-alkenes of formula: [Figure] (I) (2) substituted guanidines and salts of formula: [Figure] (II) (3) substituted biguanidines of formula: [Figure] (V) (4) substituted biguanidines of formula: [Figure] (VII) wherein the substituents can have different meanings, and (B) at least an alkali metal or alkaline earth metal salt of organic acids having a dissociation constant Ka-1.

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A process for preparing a hydrophile polyurethane foam absorption material for medical and hygienic use comprising reaction of hydrophile polyol, a polyisocyanate wherein NCO groups are not directly bonded to an aromatic ring, a foam stabilizer, a swelling agent and an effective amount of a catalyst

A process for preparing a hydrophile polyurethane foam absorption material for medical and hygienic use comprising reaction of hydrophile polyol, a polyisocyanate wherein NCO groups are not directly bonded to an aromatic ring, a foam stabilizer, a swelling agent and an effective amount of a catalyst, wherein the catalyst consists essentially of: (A) at least one compound selected from the group consisting of (1)diazabicycloalkenes of the formula: [Figure] (I) wherein m varies from 3 to 7 and n from 2 to 4, and salts thereof with organic acids the dissociation constant of which is Ka≤10-2; (2) substituted guanidines and salts thereof of the formula: [Figure] (II) wherein R1, R2, R3 and R4 can independently represent a C1-C4 alkyl radical, a C1-C4 alkyl radical substituted by a C1-C4 alkoxy radical, or a heterocyclic C5-C7 radical comprising at most two atoms from the group consisting of sulfur and oxygen, R1 and R2 and/or R3 and R4 may form with the adjacent nitrogen a heterocyclic C5-C7 ring containing at most one member from the group consisting of sulfur or oxygen atom, X represents a member selected from the group consisting of hydrogen, phenyl, a phenyl group substituted by one or more C1-C4 alkoxy radicals, C1-C12 alkyl radicals or halogens, or represents a radical of the formula: [Figure] (III) wherein R5, R6 and R7 can independently represent hydrogen, a C1-C4 alkyl radical or a C1-C4 alkyl radical substituted by a member selected from the group consisting of phenyl, substituted phenyl, C1-C4 alkoxy, C6-C15 aryloxy, nitrile or carbalkoxy, or R7 may represent a member selected from the group consisting of a C5-C18 alkyl radical, a substituted phenyl radical or a C1-C4 alkoxy radical; or one or two of the groups R5-R6, R5-R7 or R6-R7 can form a cyclic ring of more than one member selected from the group consisting of nitrogen, sulfur or oxygen atom, and X may also represent a radical of the formula: [Figure] (IV) wherein z is an integer of from 2 to 12, R′and R″represent a member selected from the group consisting of hydrogen or a C1-C4 alkyl radical, R′′′and R′′′′represent a member selected from the group consisting of a C1-C4 alkyl radical or form with the adjacent nitrogen of a C5-C6 cycloalkyl radical; and addition salts of said guanidines; and addition salts of guanidines; (3) substituted biguanidines of the formula: [Figure] (V) wherein Q1 to Q6 can independently represent a member selected from the group consisting of C1-C4 alkyl or a C3-C4 cycloalkyl radical, and X′is hydrogen or a carbamoyl radical of the formula: [Figure] (VI) in which Z is a monovalent radical remaining after elimination of an isocyanate group from the above mentioned polyisocyanate, Q1 to Q6, X′and Z may optionally be substituted by a member selected from the group consisting of chlorine, bromine or a C1 or C2 alkoxy radical; and (4 ) substituted biguanidines of the formula: [Figure] (VII) wherein M1 to M8 can independently represent a C1-C4 alkyl radical, Y represents a group of the formula: [Figure] (VIII) wherein M9 and M10 represent a member selected from the group consisting of hydrogen or a C1-C4 alkyl radical, and a3 to 12 or represents a divalent cyclohexyl or a divalent isophorene radical; and (B) at least one alkali or alkaline earth metal salt of an organic acid having a dissociation constant Ka≤10-1.