Polyurethane resin composition, polyurethane resin, molded article, fiber reinforced plastic, and method for producing fiber reinforced plastic

A polyurethane resin composition comprising:

• a polyisocyanate component containing polyphenylmethane polyisocyanate,
• a polyol component,
• an organic metal catalyst, and
• a reaction retardant represented by general formula (1), general formula (2), general formula (3), general formula (4), or general formula (5) below, wherein
• the mole ratio of the reaction retardant relative to 1 mol of the organic metal catalyst is 0.50 or more and 2.50 or less,
• in general formula (1), A represents an aliphatic ring or aromatic ring, R1 represents a hydrocarbon group included in ring A and having 1 carbon atom, R2 represents an aliphatic hydrocarbon group having 1 carbon atom, R3 represents a hydrogen atom or alkyl group bonded to nitrogen atom included in ring A when ring A is an aliphatic ring, and represents a hydrogen atom when ring A is an aromatic ring, R4 represents a hydrogen atom or carboxyl group bonded to ring A, m is 1, n is 0 or 1, and —COOH is bonded to ring A through R2 bonded to R1 at a position of ring A when n is 1, and is bonded directly to R1 at a position of ring A when n is 0;
• in general formula (2), A represents an aliphatic ring or aromatic ring, R2 is the same as R2 in general formula (1), R3 represents a hydrogen atom or alkyl group bonded to nitrogen atom included in ring A when ring A is an aliphatic ring, R3 does not exist when ring A is an aromatic ring, n is 0, and —COOH is bonded directly to ring A;