Solid Phosphite Antioxidant
Introduction
Solid phosphite antioxidants are powdery or flaky solid secondary antioxidants, widely applied in polyolefins, engineering plastics, PVC, elastomers and masterbatch. Their core functional group is phosphite ester (P-O bond); PEPQ belongs to phosphonite with stable P-C bond.
Table 1 Solid phosphite antioxidant products
| Grade | cas number | Application |
| BX AO 168 | 31570-04-4 | hydrolytically stable phosphite, most widely used, replace basf irgafos 168 |
| BX AO 618 | 3806-34-6 | ABS, Styrenics, replace ultranox 618 |
| BX AO 626 | 26741-53-7 | high-performance phosphite antioxidant for engineering plastics,replace ultranox 626 |
| BX AO 9228 | 26741-53-7 | For Engineering plastics, replace Doverphos S-9228 |
| BX AO H10 | – | for nylon, replace BRUGGOLEN H10. |
| BX AO PEPQ | 119345-01-6 | For Engineering plastics, replace hostanox PEPQ |
| BX AO PEP-36 | 80693-00-1 | For Engineering plastics, replace Adk stab pep-36 |
Selection Guide of solid phosphite antioxidants
- General polyolefin: PP, PE, EVA, plastic film, injection molding parts, color masterbatch (main grade: 168).
- Transparent & optical plastics: ABS, PC, PC/ABS alloy, PET optical sheet (main grades: 626, PEP36, 9228).
- Engineering plastics: Glass fiber reinforced PA, PBT, high-temperature modified materials (main grades: 9228, PEP36, PEPQ).
- Nylon H10, 9228
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