Cohedur® RDL

Cohedur® RDL by Rhein Chemie Additives (Lanxess Group) is a direct bonding agent for rubber to fabrics (cotton, rayon, poly-amide, polyester), steel cord and glass fibers. It obtained excellent adhesion with polar and un-polar elastomers, such as NBR, HNBR, CR, NR, IR, SBR and BR. In this additive, oil-extended elastomers can yield in inferior results as also highly saturated polymers like IIR and EPDM, at a considerably lower adhesion level. In steel cord the bond strength increases in the order raw, zinc plated and brass-plated steel. It finds application in tires, conveyor belting, V-belts, reinforcing hose, air springs, flexible containers and fabric proofing. Recommended typical levels of addition based on 100 parts by weight of elastomer are 6-8 phr in Cohedur® RDL, 1-30 phr in Vulkasil® S with textile and 5-10 phr in Vulkasil® S with steel cord. It has a shelf life of 91 days.