New Cohedur® Bonding Agent From Lanxess Said To Ease Processability

Leverkusen - LANXESS's latest product is the new bonding agent Cohedur® VP RUC 9206 for rubber-steel cord or rubber-textile composites which is said to mix better and display a much lower sublimation tendency than resorcin as a bonding agent constituent. The rubber technology properties in an RFS system (resorcin-formaldehyde donor-silica) are therefore said to be comparable with those of resorcin.

The anti-reversion agent Vulcuren® KA 9188, which has been on the market for two years now, is a bi-functional crosslinker for diene rubbers, such as NR, IR, BR and SBR. Accelerated sulfur vulcanization in the presence of Vulcuren® KA 9188 leads to the formation of thermodynamically stable, flexible hybrid network points. The vulcanized rubbers formed by Vulcuren® KA 9188 display a marked resistance to reversion and aging. The benefits for the tire industry include less hardening of the tread due to aging and therefore more constant grip properties in wet and dry conditions throughout the entire service life of the tire. In addition to being established as a crosslinker, Vulcuren® can also be applied as a scorch-proof secondary accelerator.

Vulkazon® AFD has been on the market for 40 years. Both it and the somewhat newer Vulkazon® AFS belong to the class of non-discoloring antiozonants for vulcanized diene rubbers. Vulkazon® AFS and AFD do not discolor on contact and are used in white and colored rubber items from bike tires to profiles. However, even in products filled with carbon black where a black surface is important, Vulkazon® AFS or AFD are said to have established themselves as problem-solvers. The method of action of both products is based on reactive double bonds, which prefer to react with ozone before the ozone destroys the polymer chain. In the right formulation, the effectiveness of Vulkazon® AFS and AFD as antiozonants is claimed to be comparable to that of the discoloring phenylene diamines.

Source: LANXESS