Silica Filler For Silicone Rubber

These bonds are responsible for the high reinforcing potential of the silica silane filler system.

Silica filler for silicone rubber.

Provided is a hydrophilic precipitated silica which is well suited to use in silicone rubber formulations rtv 1 rtv 2 htv and lsr particularly well suited to use in htv silicone rubber formulations. It has a bet surface area of 185 260 m 2 g a ctab surface area of 100 160 m 2 g a bet ctab ratio of 1 2 2 6 and a conductivity of 250 μs cm. Silicone rubber is an elastomer rubber like material composed of silicone itself a polymer containing silicon together with carbon hydrogen and oxygen silicone rubbers are widely used in industry and there are multiple formulations. Hdk optimizes processes and products across a wide range of applications and industries.

Silicone rubbers are often one or two part polymers and may contain fillers to improve properties or reduce cost. Moreover an adsorption layer called bound rubber or immobilized layer filler gel is believed to form on silica aggregation eventually composes a reinforcement filler network. In order to provide complete functionality this web site needs your explicit consent to store browser cookies. Hdk pyrogenic silica improves the performance stability and handling of your systems and formulations at all phases of production and processing.

The amount of the filler present in the compound has an impact on the bulk density which is why it is necessary to find the optimal value without sacrificing the inherent low density of the silicone rubber. In the present work two secondary fillers organoclay nanofiller and n134 carbon black were added to silica based natural rubber compounds at a proportion of silica secondary filler of 45 10 phr. Both chemical reactions have to be carefully controlled. The compounds were prepared with variable mixing temperatures based on the mixing procedure commonly in use for silica filled nr systems.

Bound rubber is generally defined as the polymer chains that cannot be extracted from suspensions by a good solvent at room temperature. In figure 1 the stress strain curves of a liquid silicone rubber are shown with different quantities of fillers. In this paper the silicone rubber filled with silica in a wide volume range was measured in order to study the effects of filler loading on the mechanical properties of silicone rubber. As a silicone rubber filler precipitated silica is an alternative to fumed silica in silicone rubber compounds by reducing cost and process inefficiencies.