To provide a catalyst composition which is a catalyst composition not impairing the physical properties of a
polyurethane resin and the storage stability of the starting material blend liquid and which is capable of producing a
polyurethane resin excellent in curability and also excellent in moldability by suppressing the initial reactivity, with good productivity.A catalyst composition for production of a
polyurethane resin, which comprises (A) triethylenediamine, and (B) a polyisocyanurating catalyst and / or (C) a highly
temperature sensitive catalyst, wherein the polyisocyanurating catalyst (B) is one or more compounds selected from the group consisting of an
alkali metal salt of a
carboxylic acid, a
quaternary ammonium salt compound of the following formula (1):wherein each of R1 to R3 is a C1-12 linear or branched, saturated or
unsaturated hydrocarbon group, provided that any two among R1 to R3 may form a hetero ring via an
oxygen atom or a
nitrogen atom, R4 is a C1-18
alkyl group or an
aromatic hydrocarbon group, and X is an
organic acid group having an
acid dissociation constant (pKa) of at most 4.8, N,N,N′-trimethylaminoethylethanolamine and 2,4,6-
tris(dimethylaminomethyl)
phenol; the highly
temperature sensitive catalyst (C) is one or more compounds selected from the group consisting of a
triazole salt of 1,8-diazabicyclo[5.4.0]undecene-7, a
benzotriazole salt of 1,8-diazabicyclo[5.4.0]undecene-7, a
triazole salt of 1,5-diazabicyclo[4.3.0]
nonene-5, a
benzotriazole salt of 1,5-diazabicyclo[4.3.0]
nonene-5, a
triazole salt of 1,8-diazabicyclo[5.3.0]
decene-7 and a
benzotriazole salt of 1,8-diazabicyclo[5.3.0]
decene-7; and the blend ratio of the polyisocyanurating catalyst (B) and / or the highly
temperature sensitive catalyst (C) to the triethylenediamine (A) is from 2 wt % to 60 wt %.