Lightweight Composite Material Having a Scratch-Resistant Surface and Method for the Production Thereof

Abstract

The present invention relates to a lightweight composite material having a binder and at least one first and at least one second filler, the first filler having a density of >2 kg/l and a Mohs hardness of >4 and the second filler having a bulk density of <2.5 kg/l. The concentration of the first filler in the composite material decreases starting from a first surface of the composite material in the direction of an opposite second surface of the composite material. In addition, the invention relates to a method for producing a composite material. This method includes the steps of providing a first filler which has a density of >2 kg/l and a Mohs hardness of >4, and providing a second filler which differs from the first filler and has a bulk density of <2.5 kg/l, and setting a concentration of the first filler in the resin that decreases in the vertical direction from a base surface of the casting mould by utilising the different mobilities of the filler particles in the resin.

Dependencies are inferred from the claim text.