Two-pack type curable adhesive composition

A two-pack type curable adhesive composition comprising:

• a base (A) containing a urethane prepolymer (a1) having an isocyanate group;
• and
• a curing agent (B),
• at least one of the base (A) or the curing agent (B) containing polymer particulates (X) having an average particle size of from 0.01 to 200 m,
• the polymer particulates (X) having a glass transition temperature of from −40° C. to +80° C.,
• a content of the polymer particulates (X) being 5 mass % or greater in a total amount of the two-pack type curable adhesive composition,
• a cured product (P) obtained by curing the two-pack type curable adhesive composition having a loss tangent of 0.15 or greater under conditions of a temperature region of from −40° C. to +80° C. and a frequency of 100 Hz, and
• the cured product (P) not breaking under conditions of a stress amplitude of 2.8 MPa and a repetition number of up to 107 times in a tensile shear fatigue property test in accordance with JIS K6864, wherein
• a cured product (N) obtained by curing a remainder obtained by removing the polymer particulates (X) from the two-pack type curable adhesive composition has a minimum value of a loss tangent of 0.05 or greater as measured under conditions of a temperature region of from −40° C. to +80° C. and a frequency of 100 Hz,
• the polymer particulates (X) have a tensile modulus of elasticity of 5 MPa or more,
• the urethane prepolymer (a1) is obtained by reacting a polyisocyanate compound (a2) and a polyol compound (a3) at an equivalence ratio of an isocyanate group in the polyisocyanate compound (a2) to a hydroxyl group in the polyol compound (a3) of from 1.5 to 2.5,
• the curing agent (B) contains a polyol compound (b1) and a polyamine compound (b2),
• an equivalent ratio of an isocyanate group in the base (A) to an active hydrogen-containing group in the curing agent (B) is from 0.8 to 4, and
• an equivalent ratio of an isocyanate group in the base (A) to an amino group in the polyamine compound (b2) is from 1.5 to 8.0.