Imino-azacyclopentanepolyol

A curable composition for producing a polyurethane containing a catalytically and curing effective amount of a polyol represented by the formula:

• ##STR4## wherein R.sup.1 represents H, phenyl, an alkyl group having 1-12 C-atoms, OH, a hydroxyalkyl group having 1-12 C-atoms, a hydroxyaryl group having 1-12 C-atoms or a hydroxyaralkyl group having 1-12 C atoms,
• R.sup.2 and R.sup.3, independently of one another, represents OH, a hydroxyalkyl group having 1-12 C-atoms, a hydroxyaryl group having 1-12 C-atoms or a hydroxyaralkyl group having 1-12 C-atoms, and
• R.sup.1 is not H when both R.sup.2 and R.sup.3 represent OH.

A polyol represented by the formula ##STR5## wherein R.sup.1 represents H, phenyl, an alkyl group having 1-12 C-atoms, OH, a hydroxyalkyl having 1-12 C-atoms, a hydroxyaryl group having 1-12 C-atoms or a hydroxyaralkyl group having 1-12 C atoms, and

• R.sup.2 and R.sup.3, independently of one another, represent OH, a hydroxyalkyl group having 1-12 C-atoms, a hydroxyaryl group having 1-12 C-atoms or a hydroxyaralkyl group having 1-12 C-atoms,
• R.sup.1 is not H when both R.sup.2 and R.sup.3 represent OH, and
• either (i) the alpha carbon atom of at least one of R.sup.1, R.sup.2, and R.sup.3 is unsubstituted, said alpha atom being with respect to the nitrogen atom to which each of R.sup.1, R.sup.2, and R.sup.3 is respectively bonded, or (ii) the alpha carbon atom and the beta carbon atom of at least one of R.sup.1, R.sup.2, and R.sup.3 are each unsubstituted, said alpha carbon atom and said beta carbon atom being with respect to the nitrogen atom to which each of R.sup.1, R.sup.2, and R.sup.3 is respectively bonded.