The invention relates to the technical field of polymers, in particular to an
epoxy adhesive and a preparation method thereof. The
epoxy adhesive comprises a component A and a component B, wherein thecomponent A comprises the following substances in parts by weight: 80 to 100 parts of
epoxy resin, 5 to 15 parts of a diluting agent, 10 to 30 parts of a
toughening agent, 0 to 5 parts of a
silane coupling agent, 0 to 0.5 part of a
wetting dispersing agent, 0 to 30 parts of silica
powder, 30 to 100 parts of talcum
powder, 0 to 30 parts of
calcium carbonate, and 0 to 2 parts of a thixotropic agent; the component B comprises the following substances in parts by weight: 80 to 100 parts of an amine curing agent, 0 to 6 parts of a
silane coupling agent, 0 to 30 parts of silica
powder, 30 to 100 parts of talcum powder, 0 to 30 parts of
calcium carbonate, and 0 to 2 parts of a thixotropic agent . Compared with the
epoxy adhesive with same
viscosity, the
epoxy adhesive of the invention is higherin
adhesion strength and stripping strength, moderate in curing speed, not only capable of satisfying the large-area
coating, but also capable of being used for small-area adhesion, and not only capable of being cured at the normal temperature, but also capable of being rapidly cured in a heating manner, thereby meeting the requirements of different working conditions.