Abstract: A structural polyurethane adhesive contains a polyisocyanate component and a polyol component. The polyisocyanate component contains an isocyanate group-terminated urethane prepolymer that is a reaction product of a first material polyisocyanate containing an aromatic polyisocyanate and a first material polyol containing a macropolyol. The polyol component contains: a hydroxyl group-terminated urethane prepolymer that is a reaction product of a second material polyisocyanate containing an araliphatic polyisocyanate and/or an alicyclic polyisocyanate and a second material polyol containing a macropolyol; and a low molecular-weight polyol.

Abstract: A structural polyurethane adhesive contains a polyisocyanate component and a polyol component. The polyisocyanate component contains a first isocyanate component containing a first isocyanate group-terminated urethane prepolymer that is a reaction product of a first material polyisocyanate consisting of an aromatic polyisocyanate and a first material polyol containing a macropolyol, a second isocyanate component containing a second isocyanate group-terminated urethane prepolymer that is a reaction product of a second material polyisocyanate consisting of an araliphatic polyisocyanate and/or an aliphatic polyisocyanate and a second material polyol containing a polyether polyol having a number average molecular weight of 160 or more and 4900 or less, and a third isocyanate component containing a carbodiimide-modified product of an aromatic polyisocyanate.

Abstract: In a structural polyurethane adhesive, a polyisocyanate component contains a first prepolymer component containing a first isocyanate group-terminated urethane prepolymer which is a reaction product of a first material polyisocyanate consisting of an aromatic polyisocyanate, and a first material polyol containing a macropolyol; and a second prepolymer component containing a second isocyanate group-terminated urethane prepolymer which is a reaction product of a second material polyisocyanate consisting of an araliphatic polyisocyanate and/or an aliphatic polyisocyanate, and a second material polyol containing a polyether polyol having a number average molecular weight of 160 or more and 4800 or less. A ratio of the second prepolymer component with respect to the total amount of the first prepolymer component and the second prepolymer component is 2% by mass or more and 35% by mass or less.

Abstract: A structural polyurethane adhesive includes a polyisocyanate component containing a urethane prepolymer having an isocyanate group at its terminal and a derivative of xylylene diisocyanate; and a polyol component containing a macropolyol having a number average molecular weight of 500 or more and 10000 or less, and an average number of hydroxyl groups of 1.9 or more and 4.0 or less.

Abstract: The microcellular polyurethane elastomer of the present invention has (1) an overall density (D) of 100 kg/m3 or more but 900 kg/m3 or less, and (2) overall density (D) and compression set (CS2, unit: %) satisfying the relationship shown by the following equation (1): and CS2≦0.00008*D2−0.091*D+42   (1)  overall density (D) and cell diameter (X, unit: &mgr;m) on the skin surface satisfying the relationship shown by the following equation (2): X≦120e−0.0015D   (2).

Abstract: The microcellular polyurethane elastomer of the present invention has