The invention relates to polymer modified inorganic particles with a layer structure with an average particle diameter of 5 nm to 20000 nm, containing 20 to 5000 mass % interlamellarly, in relation to the anhydrous inorganic particle, of a mixture of aminoplasts and water. These polymer modified inorganic particles are produced by swelling the inorganic particles with aldehydes and then reacting the inorganic particles with multifunctional C1-C30 amino compounds. The invention also relates to plastics containing polymer modified particles with a layer structure and to semi-finished products and moulded materials produced from the same.
