Processing color
Strong protection against yellowing during extrusion and molding.
SUNNOX® PEP-36 is a pentaerythritol diphosphite secondary antioxidant. It protects color and melt flow during processing of polyolefins, styrenics and engineering plastics, with good hydrolysis stability for its class.
PEP-36 (bis(2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite) is a high-melting white powder with a molecular weight of 632.7. It is used with phenolic antioxidants to prevent discoloration and melt-flow change in PP, PE, PS, ABS and PC processing.
Strong protection against yellowing during extrusion and molding.
Keeps melt flow stable through multiple passes.
Better hydrolysis resistance than many pentaerythritol diphosphites.
| Paramètre | Valeur typique |
|---|---|
| Nom du produit | Antioxidant PEP-36 |
| Marque | SUNNOX® PEP-36 |
| Numéro CAS. | 80693-00-1 |
| Nom chimique | Bis(2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite |
| Formule moléculaire | C35H54O6P2 |
| Masse moléculaire | 632.7 |
| Apparence | Poudre blanche |
| Point de fusion | ≥235 °C |
Spécification typique. Chaque envoi est fourni avec un COA de lot; les limites applicables à votre commande sont confirmées dans le devis et le contrat.
Pick an application to see how PEP-36 is normally used and what to confirm before your trial.
Processing stabilizer with a phenolic antioxidant in PP and PE.
Prevents discoloration in PS, HIPS and ABS processing.
Used for color stability in PC processing.
| Votre exigence | Ce qui fonctionne habituellement |
|---|---|
| Stabilité de la couleur et de l'écoulement à l'état fondu pendant l'extrusion ou le moulage | Phosphite antioxydant secondaire (168) avec un primaire phénolique |
| Vieillissement thermique à long terme en service | Primaire phénolique à haut poids moléculaire (1010), souvent avec un thioester (DLTDP / DSTDP) |
| Couche mince, fibre, mélange à bas point de fusion | Phénolique à bas point de fusion (1076) pour une dispersion facile |
| Traitement répété / contenu recyclé | Relever la part de phosphite dans le mélange et vérifier le jaunissement après chaque passage |
| Stockage humide ou long transit | Phosphite résistant à l'hydrolyse tel que 168; garder les sacs scellés |
| Articles à contact alimentaire | Ask for the grade-specific food-contact statement before trials |
| Remplacement d'une note existante | Envoyez votre TDS ou COA actuel; we match on the parameters you approve |
Faites glisser ou faites défiler horizontalement pour voir toutes les colonnes →
| Produit | Taper | Mol. poids | Point de fusion | Emploi principal |
|---|---|---|---|---|
| SUNNOX® PEP-36 | Diphosphite · secondary | 632.7 | ≥235 °C | Color and melt stability |
| SUNNOX® 168 | Phosphite · secondaire | 646.9 | 183–187 °C | Stabilité du traitement, Couleur |
| SUNNOX® 9228 | Diphosphite · secondary | 853.0 | ≥225 °C | High-temperature processing, hydrolysis resistance |
| SUNNOX® 1010 | Phénol encombré · primaire | 1177.6 | 110–125 °C | Protection thermique à long terme |
| SUNNOX® 1076 | Phénol encombré · primaire | 530.9 | 50–55 °C | Protection à long terme, dispersion facile |
Définissez les niveaux dans votre propre essai. Le bon niveau dépend de la résine, résidu de catalyseur, température de traitement et durée de vie. Les antioxydants primaires et secondaires effectuent des tâches différentes et ne sont pas interchangeables.
25 kg net bags or cartons with a PE inner liner. Palletized.
Keep sealed in a cool, sec, ventilated place away from heat and direct sun. See the SDS for full handling details.
Regular grades are usually in stock. For large volumes, lead time is confirmed in the quotation. We quote FOB and CIF.
Yellowing or melt-flow change during processing points to the phosphite share; embrittlement or cracking after months in service points to the phenolic and thioester share. Note recycled content and the number of extrusion passes.
Most polyolefin packages start from a phenolic primary plus a phosphite secondary, then adjust. Send your current package and we suggest a starting blend for the trial instead of changing several variables at once.
For powders: essai, melting range, volatiles and light transmittance at 425/500 nm (a direct read on color). Ask for the same parameters on our COA that appear on your incoming-inspection sheet.
Agree packaging, monthly volume, destination port and required documents up front. A matching CAS number alone does not qualify a new source; run your trial and keep the approved lot COA as the reference.
Start with your polymer, quantité et destination. Add your current grade or specification and we will quote against it.
| Information | Exemple |
|---|---|
| Polymer / Material | PP, PE, abdos, composé, mélange maître |
| Application | Injection molding, extrusion, film, fibre |
| Current additive | Grade or supplier you use today |
| Spécification requise | Your TDS, COA or key limits |
| Quantité | Commande à l'essai / mensuel / volume annuel |
| Emballage | Standard 25 kg or specific requirement |
| Destination | Pays et port |
| Documents nécessaires | COA, FDS, ATTEINDRE, food-contact statement |
Hydrolysis-resistant phosphite secondary antioxidant for color and melt-flow protection during processing.
Voir le produit →High-performance diphosphite for high-temperature processing with excellent hydrolysis resistance.
Voir le produit →High-MW hindered phenolic primary antioxidant for long-term thermal protection with low volatility.
Voir le produit →Low-melting hindered phenolic primary antioxidant, easy to disperse in film and compounding.
Voir le produit →PEP-36 is more efficient per unit of phosphorus and gives strong processing color; 168 is the general-purpose standard with excellent hydrolysis resistance. The choice depends on your process and storage conditions.
Keep bags sealed and dry. Phosphites react slowly with moisture, so avoid humid storage.
Oui, pair it with a phenolic primary such as 1010 for long-term protection.
Oui. Tell us the polymer, the test you plan to run and the quantity you need. Samples ship with a COA so you can compare the lot against your current material.
Send us the agreed specification and the COA showing the difference (parameter, unité et méthode de test). We check it with the production batch record before you accept the material, and replace or re-test where the lot is out of specification.