Lanxess: Tailored solutions for the tyre industry
Lanxess announced that it will be showcasing its versatile and sustainable solutions for tyre manufacturing at the Tire Technology Expo 2020 from 25 – 27 February 2020 in Hanover, Germany. These include a wide range of Rhenodiv release agents, Rhenomark tyre marking paints, Rhenoshape tyre vulcanisation bladders, Rhenogran aramid-fibre masterbatches, and special additives.
“While the tyre industry faces environmental and market related challenges, the importance of cooperating with ‘solution providers’ rises sharply,” said Emre Ekici, Head of Marketing Tire Products at Lanxess’ Rhein Chemie business unit. “Our Rubber Additives business line helps tyre companies by increasing the tyre performance and lowering the environmental footprint with an extensive portfolio of compound additives, release agents and bladders.”
According to Lanxess, today’s tyres require tailored solutions in their production processes. The removal of release agents is essential for sealant tyres or low-noise tyres because it ensures that the polymers, foams or sensors applied subsequently will adhere properly. Sensors which transmit important data such as tyre pressure, temperature or tread depth, to the drivers or fleet operators can help prevent damage to the tyres and improve safety considerably.
Rhein Chemie offers a diverse portfolio of release agents. It extends from traditional silicone-based products such as Rhenodiv BP-286 and Rhenodiv BP-2864 which are removed after vulcanisation from the tyres with mechanical washing systems or by laser technology, to the new generation, silicone-free products such as Rhenodiv BP-166 and Rhenodiv BP-9500.
The water-based bladder coating Rhenodiv BC-1700 provides a high-performance release on the bladder surface while minimising the environmental effects and increasing work safety, said Lanxess. With their good lubricity and transfer from green tyre to the bladder, Rhenodiv SP-1010 and Rhenodiv SP-1020 are said to help manufacturers to decrease the scrap rates and save resources.
According to the company, permanently coated Rhenoshape bladders enable tyre manufacturers to vulcanise tyres without additional release agents, eliminating the need to clean the vulcanised tyres. Since the spraying process for tyre blanks would no longer be necessary, no contamination could occur – neither in critical tyre areas nor at the workplace. Likewise, this technology ensures that no silicon is used in the tyre production process, said Lanxess.
With its broad portfolio of dithiophosphates, special accelerators and fibre masterbatches, Rhein Chemie provides solutions for nitrosamine-free and highly reinforced tyre compounds. Its dithiophosphates (including Rhenogran TP-50 and Rhenogran SDT-50) are nitrogen-free accelerators that can replace typical sulfenamide, thiuram, and carbamate accelerators. Their advantage is that they mainly form mono- and disulfidic crosslinks, which are more thermally stable and less susceptible to reversion. When the dithiophosphates are used in parallel with sulfenamide accelerators, this generates cross-linking synergies which improve the efficiency of the process, said the manufacturer.
Under extreme mechanical, dynamic, and thermal loads, the aramid fibre masterbatches of the Rhenogran P91-40 series are said to provide a very good reinforcing performance for tyre compounds. The product is said to help disperse the highly robust and very light Twaron aramid short fibre pulp evenly into the rubber mixture. Rhenogran P91-40 is not only suitable for use in typical tyre polymers such as NR, IR, BR and SBR, but also for many other types of rubber such as EPDM, CR and NBR.