Same Material for Multiple Entities

I tried to use the same Material (Pointer) for two different entities, since they should have the same color. This works. But as soon as one entity is disabled, the other is also not rendered anymore.
I don't see any good approach to store a user defined Material Pointer (as QComponent Pointer) and to generate new MaterialPointers (with the same properties) for new added entities added by user (gui-input).