Polyoxyalkylene polyol or monool and polyurethane resin

A polyoxyalkylene polyol or monool (S), which is an alkylene oxide adduct of an active hydrogen-containing compound (H), wherein 40% or more of hydroxyl groups located at the terminal are primary hydroxyl group-containing groups represented by formula (1);

• wherein the polyoxyalkylene polyol or monool (S) is represented by formula (2);
• wherein in the formula (1), R1 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group or a phenyl group, and these groups are unsubstituted or substituted with a halogen atom or an aryl group,
• R2—[—(ZO)p-(AO)q-(CH2CH2O)r-H]m (2)
• wherein in the formula (2), R2 represents an m-valent group in which m active hydrogens are removed from the active hydrogen-containing compound (H);
• Z is a group represented by the formula (3) or (4) shown below;
• A is a group represented by the formula (5) or (6) shown below in which 40% or more of the structure of A located at the terminal among the moiety of (AO)q in the formula (2) is a structure represented by the formula (6) and, when a plurality of Zs or As are present, each be the same or different;
• m is 1 (when (S) is a monool) or an integer of 2 to 100 (when (S) is a polyol);
• p is 0 or an integer of 1 to 200;
• q is an integer of 1 to 200;
• and r is 0 or an integer of 1 to 200,
• wherein in the formulas (3) and (4), R3 is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group or a phenyl group and these groups are unsubstituted or substituted with a halogen atom or an aryl group and, in the formulas (5) and (6), R4 is an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group or a phenyl group and these groups are unsubstituted or substituted with a halogen atom or an aryl group,
• wherein a hydroxyl value x, the total degree of unsaturation y and the content of ethylene oxide z satisfy a relationship of the mathematical expression (3),
• y≦18.9×x−2×(100−z)/100 (3)
• in the mathematical expression (3), x represents 5 to 280 mgKOH/g, y represents the total degree of unsaturation represented by a unit meq/g, and z is the content (% by weight) of ethylene oxide based on the weight of (S) and is from 0 to 50,
• wherein the moiety of -(AO)q- in the formula (2) is obtained by ring-opening addition polymerization of an alkylene oxide having 3 to 12 carbon atoms in the presence of at least one catalyst (C) selected from the group consisting of a compound represented by the formula (7-1) shown below, a compound represented by the formula (7-2) shown below and a compound represented by the formula (7-3) shown below
• in the formula (7-1), (7-2) or (7-3), respectively, X represents a boron atom or an aluminum atom;
• F is a fluorine atom;
• and R5 represents a substituted or unsubstituted phenyl group represented by the formula (8) shown below or a tertiary alkyl group represented by the formula (9) shown below, and each be the same or different,
• in the formula (8), Y represents an alkyl group having 1 to 4 carbon atoms, a halogen atom, a nitro group or a cyano group;
• and k represents the number of 0 to 5 and, when k is 2 to 5 a plurality of Ys being respectively the same or different,
• in the formula (9), R6, R7 or R8 each independently represents an alkyl group having 1 to 4 carbon atom.