Solid sulfur-containing silane coupling agent is commonly known as sulfur-containing silane coupling agent pellets. According to the product form, it is divided into two types: columnar and granular.

Columnar pellets are made by mixing liquid silane coupling agent and dry granulation carbon black in a certain proportion in an internal mixer, and then extruding and cutting pellets through a screw extruder. The outlet diameter and extrusion speed of the screw extruder Control the diameter and length of columnar pellets;

Due to the limited adhesion of sulfur-containing silane coupling agents to carbon black, it is usually necessary to add a certain amount of binder or polymer to the formulation to maintain the stability of the product shape and structure.

Granular particles are made by mixing liquid silane coupling agent and wet granulated carbon black in a double screw mixer. The liquid is adsorbed by carbon black particles and aggregated and granulated, and then sieved to obtain granular products with a certain particle size range. Products that are too large or too small are recycled back to the mixer for re-granulation.

More information feel free to contact us: "Martina Liu"