Urethane adhesive composition
An object of the present invention is to provide a urethane adhesive composition excellent in adhesion durability for an olefin resin. The present invention is a urethane adhesive composition containing a urethane prepolymer having an isocyanate group, an isocyanurate compound of pentamethylene diisocyanate and/or hexamethylene diisocyanate, and a secondary aminosilane compound.
1. A urethane adhesive composition comprising:
a urethane prepolymer having an isocyanate group;
an isocyanurate compound of pentamethylene diisocyanate; and,
a secondary aminosilane compound; wherein
the urethane adhesive composition is a one-part adhesive composition or a two-part adhesive composition, the two-part adhesive composition comprising the urethane prepolymer, the isocyanurate compound and the secondary aminosilane compound in a main agent, and further comprising a curing agent, and
the secondary aminosilane compound is a bis-type compound.
2. The urethane adhesive composition according to claim 1 , wherein the secondary aminosilane compound is a compound represented by Formula (A),
wherein R 13 and R 23 each independently represent a divalent linking group, R 11 , R 12 , R 21 , and R 22 each independently represent a monovalent hydrocarbon group, and m1 and m2 are each independently from 1 to 3.
3. The urethane adhesive composition according to claim 2 , wherein R 11 and R 21 each independently represent an aliphatic hydrocarbon group in Formula (A).
4. The urethane adhesive composition according to claim 2 , wherein R 13 and R 23 each independently represent a divalent hydrocarbon group having 2 to 10 carbon atoms in Formula (A).
5. The urethane adhesive composition according to claim 1 , further comprising a terpene compound.
6. The urethane adhesive composition according to claim 5 , wherein the terpene compound comprises at least an adduct of a compound represented by Formula (X) and a phenol compound,
wherein R 11 and R 12 each independently represent a hydrocarbon group.
7. The urethane adhesive composition according to claim 1 , further comprising an isocyanate silane compound.
8. The urethane adhesive composition according to claim 7 , wherein the isocyanate silane compound is a compound represented by Formula (I),
wherein R 1 and R 2 each independently represent a monovalent hydrocarbon group, R 3 represents a divalent linking group, and m is from 1 to 3.
9. The urethane adhesive composition according to claim 8 , wherein in Formula (I), R 3 represents a divalent hydrocarbon group having 1 to 6 carbon atoms, and m is from 2 to 3.
10. The urethane adhesive composition according to claim 1 , wherein a content of the secondary aminosilane compound is from greater than 0% by mass to less than 0.5% by mass relative to a total amount of the urethane adhesive composition.
11. The urethane adhesive composition according to claim 1 , used for adhering a base material containing an olefin resin.
12. The urethane adhesive composition according to claim 1 , wherein the urethane adhesive composition is the one-part adhesive composition.