Complete range for the rubber industry

Rubber blends are often ironically described as ‘exploded chemist's shops’. The number of accelerators and other essential additives for sulphur crosslinking alone can easily amount to 25 to 30 different substances. For your all-round supply we not only offer a comprehensive range of the common crosslinking agents from a single source but also specialty compounds for particular requirements: All rubber chemicals are available from LUVOMAXX^® according to requirements as pure substances and as preparations.

Crosslinking represents the core chemical process for the properties of the finished rubber product. The selection of crosslinking system crucially determines the material properties of the elastomer such as tensile stress, strength, hardness, elasticity, gas permeability and resistance to high-temperature or swelling. Elemental sulphur is no doubt the most well-known crosslinker yet rubber chemistry has dozens of possible agents.

Our experts will be glad to help you in person if you should have any further queries.

We offer you the option of designing the discontinuous mixing process to make it reproducible, clean and cost-efficient. Suitable methods include

• predispersed polymer-bound accelerators
• liquid accelerators in the form of dry liquids
• oil-coated accelerators
• special paste materials

Instead of the pure powders or liquids, polymer-bound preparations or dry liquids avoid material losses and deposits on the weighing equipment or in the feed chute of the internal mixer. The predispersed form further enhances the chemical activity of the active ingredients so that in many cases the quantity of material is reduced. Predispersed, strained crosslinking agents and accelerator masterbatches also avoid unwanted surface defects or uneven crosslinking, thus reducing the scrap rate.

During "acceleration" on the roll mill some additives in pure powder form behave almost like release agents and do not bind with the sheet. The result is material losses to the extraction system or catch pan. However, this is not the case with polymer-bound accelerators or oil-coated accelerator pastes. Here paste-like zones form immediately on the sheet and these are immediately distributed and incorporated.

The low-dust accelerator is placed where it belongs: in the blend.