| 摘要 |
PCT No. PCT/JP90/00485 Sec. 371 Date Apr. 7, 1992 Sec. 102(e) Date Apr. 7, 1992 PCT Filed Apr. 11, 1990 PCT Pub. No. WO91/15531 PCT Pub. Date Oct. 17, 1991.A urethane prepolymer useful for preparing paints, coating agents, adhesives, etc., is obtained by reacting a di-isocyanate with a tetra-functional polyol prepared by reacting erythritol with an alkylene oxide or lactone.
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