Curable resin composition
The present technology provides a curable resin composition that contains a urethane prepolymer having an isocyanate group, a coated amine formed by using a filler to coat solid amine having a melting point of 50° C. or higher, an isocyanate group-containing compound having an isocyanate group bonded to an aliphatic hydrocarbon group and having a hydrolyzable silyl group or (meth)acryloyl group, and a tertiary amine compound.
1. A curable resin composition comprising:
a urethane prepolymer having an isocyanate group;
a coated amine in which a solid amine having a melting point of 50° C. or higher is coated with a filler;
an isocyanate group-containing compound having an isocyanate group bonded to an aliphatic hydrocarbon group and at least one type selected from the group consisting of hydrolyzable silyl groups and (meth)acryloyl groups; and
a tertiary amine compound; wherein:
the solid amine is reactive with the isocyanate group of the urethane prepolymer or the isocyanate group-containing compound;
the isocyanate group-containing compound contains at least one type selected from the group consisting of isocyanate group/hydrolyzable silyl group-containing compounds and isocyanate group/(meth)acryloyl group-containing compounds;
the isocyanate group/hydrolyzable silyl group-containing compound is a compound obtained by reacting adducts, isocyanurates, biurets, or allophanates of hexamethylene diisocyanate with at least one type selected from the group consisting of secondary aminosilanes and mercaptosilanes; and
the isocyanate group/(meth)acryloyl group-containing compound has an isocyanate group bonded to an aliphatic hydrocarbon group and (meth)acryloyl groups; wherein:
a ratio value of a major axis of the filler to a particle thickness of the filler (major axis/particle thickness) is from 4 to 95, and the particle thickness is from 0.01 μm to 1 μm;
an amount of the filler is from 100 to 250 parts by mass per 100 parts by mass of the solid amine; and
all or at least a part of the coated amine surface has been subjected to hydrophobizing surface treatment by a silicone oil.
2. The curable resin composition according to claim 1 , further comprising a second filler.
3. The curable resin composition according to claim 1 , wherein the isocyanate group/(meth)acryloyl group-containing compound contains a compound obtained by reacting an aliphatic polyisocyanate compound with at least one type selected from the group consisting of hydroxy group-containing (meth)acrylamides, and hydroxy group-containing (meth)acrylates.
4. The curable resin composition according to claim 3 , further comprising a second filler.
5. The curable resin composition according to claim 1 , wherein a major axis of the filler is from 2.5 to 15 μm.
6. The curable resin composition according to claim 1 , wherein the major axis of the filler is from 0.1 to 15 μm.
7. The curable resin composition according to claim 1 , wherein the ratio value of the major axis of the filler to the particle thickness of the filler (major axis/particle thickness) is from 4 to 75.