how much kenya ippd chemical auxiliary agent for rubber tyre
how much kenya ippd chemical auxiliary agent for rubber tyre
how much kenya ippd chemical auxiliary agent for rubber tyre
how much kenya ippd chemical auxiliary agent for rubber tyre
how much kenya ippd chemical auxiliary agent for rubber tyre
  • Is 6PPD in tires a priority product?
  • DTSC designates 6PPD in tires as a Priority Product and USTMA expands its consortium to 32 tire manufacturers from around the world to prepare a Preliminary (Stage 1) Alternatives Analysis (AA) to identify and evaluate potential alternatives to 6PPD in tires. Individual consortium members submitted the report to DTSC to meet compliance deadline.
  • Does 6PPD ozonation pose environmental risks?
  • 6PPD, a tire rubber antioxidant, poses substantial ecological risks because it can form a highly toxic quinone transformation product (TP), 6PPD-quinone (6PPDQ), during exposure to gas-phase ozone. Important data gaps exist regarding the structures, reaction mechanisms, and environmental occurrence of TPs from 6PPD ozonation.
  • Is 6PPD recalcitrant under harsh pyrolysis?
  • This demonstrates the recalcitrant nature of 6PPD under harsh pyrolysis conditions and suggests solvent extraction is necessary for its removal. The TGA curve (Supplementary Fig. 11) of 6PPD shows a maximum degradation at ~300 °C and suggests that some 6PPD in the tires may sublime into the liquid product before the rubber degrades.
  • Can P-phenylenediamines be used in tires as anti-ozonants?
  • There has been some research conducted on alternative anti-ozonants that can be used in tires as anti-degradants besides 6PPD. Other p-phenylenediamines (PPDs) have historically been used for this purpose, including IPPD, 7PPD, and 77PD. Many of these potential alternatives showed similar or superior performance in the lab as an anti-ozonant.