A kind of new compound of 2-phenyl-3hydroxyethanyl-1,3-oxazolidine was successfully synthesized by addition-condensation reaction of phenyl aldehyde and beta-hydroxylethanolanline and purified by vacuum distillation. Its purity was examined by gas chromatographic analysis. Its structure was confirmed by C-13 NMR and FTIR. When this compound was added as a latent curing agent in single-component moisture-curable polyurethane system (SPU), bubbles of SPU formed during curing was obviously restrained, and the elongation at break of the cured SPU contained a certain content of 2-phenyl-3hydroxyethanyl-1,3-oxazolidine was increased to 16 times when compared with that uncontained this oxazolidine derivative. (C) 2007 Wiley Periodicals, Inc.