Two-component structural adhesive which is impact resistant at room temperature

摘要

The disclosure relates to the field of two-component epoxy resin compositions and to the use thereof as a repair adhesive, in particular in vehicle manufacturing. The two-component epoxy resin compositions according to the disclosure contain a curing component K2, which comprises between 1 and 10 wt. % of an amino group-terminated polyamide B, together with an epoxy resin component K1. The compositions show that the impact resistance is highly increased while an acceptable sheer strength is simultaneously retained.

主权项

1. A two-component epoxy resin composition comprising
one epoxy resin component K1 comprising at least one epoxy resin A that contains on average more than one epoxy group per molecule; and one hardener component K2 comprising between 1 and 10% by weight, based on the total weight of the hardener component, of an amino group-terminated polyamide B; wherein at least one of the components K1 and K2 further comprises at least one impact strength modifier C, wherein the composition comprises as the impact strength modifier C an amino group terminated impact strength modifier C1 prepared by reacting a polyurethane prepolymer having isocyanate groups, a primary diamine and optionally at least one Michael acceptor, wherein the polyurethane prepolymer having isocyanate groups is prepared from at least one polyisocyanate and at least one polyester or polyether polyol having at least two hydroxyl groups, and is a component of the hardener component K2, in an amount of from 1 to 30% by weight, based on the weight of the hardener component K2.