Two-part curable urethane adhesive composition
A two-part curable urethane adhesive composition of the present technology comprises: a main agent containing a urethane prepolymer (A), an isocyanate group-containing polyisocyanate (B), and isocyanate silane (C); and a curing agent containing a compound having at least two active hydrogen groups per molecule (D) and an aromatic compound (E) represented by Formula (1) below, where n is an integer of 1 to 5, and X represents a hydrogen atom, a hydroxy group, or an alkoxy group having from 1 to 12 carbons.
1. A two-part curable urethane adhesive composition comprising:
a main agent containing a urethane prepolymer (A), an isocyanurate group-containing polyisocyanate (B) obtained by mixing a compound exemplified as a polyisocyanate compound used during production of the urethane prepolymer (A) and a catalyst and allowing to react, and isocyanate silane (C) obtained by allowing an isocyanate group-containing compound and a compound which has a functional group being capable of reacting with the isocyanate group and has a hydrolyzable silicon-containing group to react; and
a curing agent containing a compound having at least two active hydrogen groups per molecule (D) and an aromatic compound (E) represented by Formula (1) below:
wherein, n is an integer of 1 to 5, and X represents a hydrogen atom, a hydroxy group, or an alkoxy group having from 1 to 12 carbons.
2. The two-part curable urethane adhesive composition according to claim 1 , wherein the X moiety in Formula (1) is an alkoxy group having from 1 to 12 carbons.
3. The two-part curable urethane adhesive composition according to claim 2 , wherein the X moiety in Formula (1) is an alkoxy group having from 3 to 10 carbons.
4. The two-part curable urethane adhesive composition according to claim 1 , wherein the X moiety in Formula (1) is an alkoxy group having from 3 to 10 carbons.
5. The two-part curable urethane adhesive composition according to claim 1 , wherein the isocyanurate group-containing polyisocyanate (B) is isocyanurate of pentamethylene diisocyanate.
6. The two-part curable urethane adhesive composition according to claim 1 , wherein a content of the aromatic compound (E) in the curing agent is from 0.1 to 10 mass %.
7. The two-part curable urethane adhesive composition according to claim 1 , wherein the main agent or the curing agent contains a tertiary amine catalyst.
8. The two-part curable urethane adhesive composition according to claim 1 , wherein the isocyanate silane (C) is synthesized by reacting biuret of hexamethylene diisocyanate and 3-(N-phenyl) aminopropyltrimethoxysilane.