Article, in Particular Air Spring Bellows, a Metal-Rubber Element, or a Vibration Damper

A rubber mixture comprising at least one carbon black having a BET surface area according to DIN-ISO 9277 between 35 and 140 m2/g and an oil absorption number (OAN) according to ISO 4656 between 70 and 140 ml/100 g, a first aluminum trihydrate (ATH_1) and at least a further aluminum trihydrate (ATH_2), wherein the first aluminum trihydrate (ATH_1) and the further aluminum trihydrate (ATH_2) each have a different particle size;

• wherein the particle size d50 of the first aluminum trihydrate (ATH_1) determined by laser diffraction is between 0.1 and 0.6 μm and the further aluminum trihydrate (ATH_2) has a particle size d50 determined by laser diffraction of between 0.9 and 1.5 μm;
• wherein the amount of carbon black is 5 to 30 phr;
• wherein the first aluminum trihydrate (ATH_1) is incorporated in an amount of from 30 to 70 phr;
• wherein the at least one further aluminum trihydrate (ATH_2) is incorporated in an amount of from 60 to 150 phr;
• and,
• wherein the rubber mixture is free of halogen-containing flame retardants.