johannesburg rubber auxiliary agent 4020 antioxidant supplier
johannesburg rubber auxiliary agent 4020 antioxidant supplier
johannesburg rubber auxiliary agent 4020 antioxidant supplier
johannesburg rubber auxiliary agent 4020 antioxidant supplier
johannesburg rubber auxiliary agent 4020 antioxidant supplier
  • Which antioxidants are used in rubber vulcanization?
  • The amine and phenolic antioxidants are the most widely used rubber antioxidants (Fig. 1 b and c). Generally, the phenolic antioxidants have poor antioxidative efficiency (compared to amine antioxidants) and they can delay vulcanization, but they cause little discoloration problems.
  • Can rubber antioxidants contain rare-earth ions?
  • The recently reported rubber antioxidants containing rare-earth ions are summarized in Fig. 4, for instance, Sun et al. prepared a novel hindered phenol rare-earth complex (DTSm) (Fig. 4 f) by a simple and green method using 3,5-di-tert-butyl-4-hydroxybenzoic acid (DT) and samarium chloride hexahydrate (SmCl 3 ·6H 2 O) via coordination reaction.
  • Does a sustained release of EAB improve anti-oxidative capacity of rubber composites?
  • Moreover, the retention of EAB for SBR/Loaded HNTs is about 50% higher than for SBR/HNTs and CDs after the thermo-aging testing, demonstrating the sustained release of CDs from HNTs could enhance the anti-oxidative capacity of the rubber composites.
  • Can hollow filler reduce blooming of rubber antioxidants?
  • Making the antioxidant sustained release from hollow filler is also an effective method to depress the blooming of the rubber antioxidants. These hollow fillers include halloysite, silica and carbon nanotubes, etc., with hollow tubular nanostructures and high aspect ratios.

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