COLOGNE, GERMANY: Lanxess’s business unit advanced industrial intermediates (AII) keeping in mind that the rubber articles in sealing, damping, cushioning and insulating materials requires protection against ageing, it has introduced a number of staining and non-staining antioxidants/antiozonants for the rubber industry.
Depending on their chemical structure, antioxidants and antiozonants respond to one or more ageing processes. Each antioxidant/antiozonant has a typical efficiency spectrum with regard to the various types of ageing.
With its Vulkanox, Vulkacit, Vulkazon and Renacit brands, Lanxess is one of the few producers to offer the perfect additive for every step in the rubber manufacturing process from a single source.
Vibrant to individuals – injurious to rubber
Ageing processes, which are primarily caused by the effects of oxygen, ozone and heat, change the properties of vulcanizates and can lead to their partial or total destruction over time. The resistance of rubber items mostly depends on the elastomer on which the compound is based and on the chemicals added to retard the destructive process.
NR (natural rubber), which is used to make items such as truck tires, absorbs far more oxygen than SBR (styrene-butadiene rubber), NBR (nitrile-butadiene rubber) or IIR (butyl rubber) over the same period. Unsaturated groups (such as carbon-carbon double bond content) in the rubber molecule react with oxygen and ozone. This can result in toughening, embrittlement, crazing effects and fatigue. Thus, rubber article is finally demolished.
Lanxess’s Vulkanox antioxidants and Vulkazon antiozonants significantly increase the lifespan of elastomers. AII has developed a highly effective peptizing agent in the form of wax granules called Renacit 11/WG that makes natural rubber easier to process by breaking down the molecular chains.
"We give worldwide support to the rubber processing industry with a far-reaching determination of items and demonstrated technical expertise. With many years of experience, we have the vital know-how to prescribe proper elastic chemicals for our clients' preparing operations," said Dr Jens-Hendrik Fischer, head of AII’s antioxidants and accelerators (AXX) unit.
“Lanxess offers these items as granules for simple, sheltered and low-tidy metering and incorporation. The important thing, though, is that they can be combined to further enhance a particular additive’s specific efficacy spectrum,” added Melanie Wiedemeier-Jarad, technical service manager in the AXX unit.
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