Polyurethane resin composition and surgical casting tape comprising said composition

摘要

A moisture-curable polyurethane resin composition having good storage stability under moisture-free conditions without affecting the curability in the presence of moisture comprises (a) a polyurethane prepolymer which is a reaction product of a polyol compound and a polyisocyanate compound, (b) a catalytic compound to promote curing of the composition and (c) a stabilizer which is trifluoromethane sulfonic acid in a specified amount. The improvement in the storage stability of the composition is particularly good when trifluoromethane sulfonic acid is used in combination with a specified curing catalyst. The composition is useful in the preparation of a surgical casting tape by coating or impregnating a flexible substrate web such as a glass fibre cloth therewith.