Reaction resin comprising core-shell particles and method for the production thereof and the use thereof

The invention relates to a composition comprising (A) 50 - 99.5 weight % of a reaction resin or a reaction resin mixture that can be processed into a thermosetting material and is liquid at temperatures in the range from 15 to 100 DEG C and has an average molecular weight of 200 to 500,000, and having a sufficient number of suitable reactive groups for the curing process, and (B) 0.5 to 50 weight% of one or more three-dimensionally cross-linked redispersed polyorganosiloxane rubbers, which are homogenously present in the reaction resin or reaction resin mixture in a finely distributed form as polyorganosiloxane rubber particles having a diameter of 0.001 to 0.4 [mu]m, the polyorganosiloxane rubber particles being made of a core (a) made of a silicone-organic polymer and an organopolymer shell (d) and optionally two inner shells (b) and (c), the inner shell (c) being an organic polymer and the inner shell (b) being a silicone-organic polymer, comprising (a) 20 to 95 weight %, relativeto the total weight of the