Urethane adhesive composition
An object of the present invention is to provide a urethane adhesive composition having excellent initial adhesiveness and excellent adhesion durability. The present invention is a urethane adhesive composition containing a urethane prepolymer (A) having an isocyanate group, an isocyanate compound (B) having an isocyanurate structure and an isocyanate group, and an adduct of a compound represented by Formula (X) below (in Formula (X), R 11 and R 12 each independently represent a hydrocarbon group) and a phenol compound.
1. A urethane adhesive composition comprising:
from 20% to 80% by mass, relative to a total content of the urethane adhesive composition, of a urethane prepolymer (A) having an isocyanate group;
from 5.0% to 10.0% by mass, relative to a total content of the urethane adhesive composition, of an isocyanate compound (B) having an isocyanurate structure and an isocyanate group; and,
an adduct of a compound represented by Formula (X) and a phenol compound,
where R 11 and R 12 each independently represent a hydrocarbon group.
2. The urethane adhesive composition according to claim 1 , wherein the adduct is a reaction product of one molecule of the compound represented by Formula (X) and one molecule of the phenol compound.
3. The urethane adhesive composition according to claim 1 , wherein the isocyanate compound (B) comprises an isocyanurate of an aliphatic polyisocyanate.
4. The urethane adhesive composition according to claim 1 , wherein the isocyanate compound (B) comprises an isocyanurate of pentamethylene diisocyanate.
5. The urethane adhesive composition according to claim 1 , used for adhering a base material containing an olefin resin.
6. A urethane adhesive composition comprising:
from 20% to 80% by mass, relative to a total content of the urethane adhesive composition, of a urethane prepolymer (A) having an isocyanate group;
from 1.5% to 10.0% by mass, relative to a total content of the urethane adhesive composition, of an isocyanate compound (B) having an isocyanurate structure and an isocyanate group; and, from 4.5% to 10.0% by mass, relative to a total content of the urethane adhesive composition, of an adduct of a compound represented by Formula (X) and a phenol compound,
where R 11 and R 12 each independently represent a hydrocarbon group.
7. The urethane adhesive composition according to claim 6 , wherein the adduct is a reaction product of one molecule of the compound represented by Formula (X) and one molecule of the phenol compound.
8. The urethane adhesive composition according to claim 6 , wherein the isocyanate compound (B) comprises an isocyanurate of an aliphatic polyisocyanate.
9. The urethane adhesive composition according to claim 6 , wherein the isocyanate compound (B) comprises an isocyanurate of pentamethylene diisocyanate.
10. The urethane adhesive composition according to claim 6 , used for adhering a base material containing an olefin resin.