Color and melt-flow protection
Keeps yellowness index and MFR stable through extrusion, molding and regrind, where most processing damage happens.
SUNNOX® 168
Antioxidante 168 Supplier for Polymer Processing
SUNNOX® 168 is a hydrolysis-resistant phosphite secondary antioxidant. Blended with a phenolic primary such as 1010 ou 1076, it protects color and melt flow while polyolefins and engineering plastics are extruded and molded.
CAS 31570-04-4 · Phosphite · Secondary antioxidant
- Lote COA com cada remessa
- Amostras para seus testes
- Suporte técnico para seu teste
Visão geral do produto & principais benefícios
Antioxidante 168 decomposes the hydroperoxides that form when polymer melts are sheared and heated, so it stops the chain reaction that causes yellowing, gels and melt-flow drift during processing. It is rarely used alone: the standard approach is a blend with a phenolic primary antioxidant, which carries the long-term protection in service. 168:1010 no 1:1 ou 2:1 is the most common starting blend in PP and PE.
Works with your phenolic
Synergistic with 1010 e 1076. Adding 168 often lets you hold or reduce the phenolic level for the same processing stability.
Hydrolysis resistant
More tolerant of humid storage and long sea transit than many other phosphites, so the powder stays free-flowing and active.
Especificações técnicas
| Parâmetro | Valor típico |
|---|---|
| Nome do produto | Antioxidante 168 |
| Marca | SUNNOX® 168 |
| Nº CAS. | 31570-04-4 |
| Nome Químico | Tris(2,4-di-terc-butilfenil) fosfito |
| Fórmula Molecular | C42H63O3P |
| Peso molecular | 646.9 |
| Aparência | White crystalline powder |
| Ensaio | ≥99,0% |
| Ponto de fusão | 183–187 °C |
| Volatile Matter | ≤0,5% (105 °C, 2 h) |
| Light Transmittance — 425 nm | ≥98% |
| Light Transmittance — 500 nm | ≥98% |
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
Applications by Polymer
Pick a material family to see how 168 is normally used and what to confirm before your trial.
Polyolefins — PE & PP
The largest use of 168. Typical packages: 168:1010 1:1 ou 2:1 for PP injection and fiber, 168:1076 for film. Total package levels of about 0.1–0.3% in PP and 0.05–0.15% in PE film are common starting points.
Verifique antes do teste
- Resin grade, catalyst type and MFR target
- Number of extrusion passes and regrind share
- Current antioxidant package and dosage
Polyamide — PA
Used with a phenolic primary to limit discoloration during compounding of PA6 and PA66, including glass-filled grades.
Verifique antes do teste
- PA type and filler content
- Processing temperature and residence time
- Color target (YI or ΔE) after molding
Polycarbonate — PC
Helps protect clarity and color at the high melt temperatures PC needs. Usually dosed low, alongside the base resin stabilizer.
Verifique antes do teste
- PC grade and whether it is a blend (PC/ABS)
- Melt temperature and optical requirements
- Existing stabilizer system
abdômen & Styrenics
Added with a phenolic antioxidant to reduce yellowing and property loss during compounding and molding of ABS and HIPS.
Verifique antes do teste
- abdômen / HIPS grade and other additives
- Heat history in compounding and molding
- Color and impact retention targets
Seleção & comparação
Selecting an Antioxidant System
| Sua necessidade | O que geralmente funciona |
|---|---|
| Color and melt-flow stability during extrusion or molding | Phosphite secondary antioxidant (168) with a phenolic primary |
| Long-term heat aging in service | High-MW phenolic primary (1010), often with a thioester (DLTDP / DSTDP) |
| Thin film, fibra, low-melting compounding | Lower-melting phenolic (1076) for easy dispersion |
| Repeated processing / conteúdo reciclado | Raise the phosphite share in the blend and check yellowing after each pass |
| Humid storage or long transit | Hydrolysis-resistant phosphite such as 168; keep bags sealed |
| Food-contact articles | Ask for the grade-specific food-contact statement before trials |
| Replacing an existing grade | Envie seu TDS ou COA atual; we match on the parameters you approve |
Antioxidant Comparison
Swipe or scroll horizontally to see all columns →
| Produto | Tipo | Mol. peso | Ponto de fusão | Main job | Typical starting level* |
|---|---|---|---|---|---|
| SUNNOX® 168 | Phosphite · secondary | 646.9 | 183–187 °C | Estabilidade de processamento, cor | 0.05–0.2% with a phenolic |
| SUNNOX® 1010 | Hindered phenol · primary | 1177.6 | 110–125 °C | Long-term thermal protection | 0.05–0.3% |
| SUNNOX® 1076 | Hindered phenol · primary | 530.9 | 50–55 °C | Long-term protection, easy dispersion | 0.05–0.3% |
| SUNNOX® DLTDP | Thioester · secondary | 514.8 | 38–42 °C | Heat-aging synergist | 0.1–0.3% with a phenolic |
| SUNNOX® DSTDP | Thioester · secondary | 683.2 | 63–69 °C | Heat-aging synergist, menor volatilidade | 0.1–0.3% with a phenolic |
*Starting points for trials, not fixed recommendations. The right level depends on resin, catalyst residue, processing temperature and service life. Primary and secondary antioxidants do different jobs and are not interchangeable.
Embalagem & armazenar
Embalagem
25 kg net bags or cartons. Pallet wrapping and private-label bags on request.
Armazenar
Keep sealed in a cool, dry place away from heat and moisture. See the SDS for full handling details.
Tempo de espera & terms
Typically 3–15 business days from order confirmation, depending on quantity. FOB, CIF or DAP to major ports.
Do primeiro e-mail ao fornecimento aprovado
Name the failure you want to prevent
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.
Start from a proven blend
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.
Compare os números que importam
For powders: ensaio, 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.
Bloqueie os termos de fornecimento
Agree packaging, monthly volume, destination port and required documents up front. Um número CAS correspondente por si só não qualifica uma nova fonte; run your trial and keep the approved lot COA as the reference.
Diga-nos sua necessidade. Nós combinamos a nota.
Start with your polymer, quantidade e destino. Add your current grade or specification and we will quote against it.
| Informação | Exemplo |
|---|---|
| Polymer / Material | PP, Educação Física, abdômen, composto, lote mestre |
| Aplicativo | Moldagem por injeção, extrusão, filme, fibra |
| Aditivo atual | Classe ou fornecedor que você usa hoje |
| Especificação necessária | Your TDS, COA or key limits |
| Quantidade | Trial order / monthly / volume anual |
| Embalagem | Standard 25 kg or specific requirement |
| Destino | País e porto |
| Documentos necessários | COA, FDS, ALCANÇAR, food-contact statement |
Produtos relacionados
SUNNOX® 1010
High-MW hindered phenolic primary antioxidant for long-term thermal protection with low volatility.
Ver produto →SUNNOX® 1076
Low-melting hindered phenolic primary antioxidant, easy to disperse in film and compounding.
Ver produto →SUNNOX® DLTDP
Thioester secondary antioxidant that boosts long-term heat aging when used with a phenolic.
Ver produto →SUNNOX® DSTDP
Higher-melting thioester synergist with lower volatility for long-term heat aging.
Ver produto →Antioxidante 168 Perguntas frequentes
What ratio of 168 para 1010 should I start with?
1:1 e 2:1 (168:1010) are the most widely used starting blends in polyolefins. Use 2:1 when processing stability and color are the main concern, 1:1 when long-term heat aging matters as much. Confirm the ratio in your own trial.
Pode antioxidante 168 be used alone?
It can, but it is not recommended. 168 protects during processing; it does little for long-term aging in service. Pair it with a phenolic primary antioxidant such as 1010 ou 1076.
Which COA parameters should I check on incoming lots?
Ensaio, melting range, volatiles and light transmittance at 425 e 500 nm. Transmittance is the quickest indicator of color quality in the final part.
Posso obter uma amostra antes de fazer o pedido?
Sim. Diga-nos o polímero, o teste que você planeja realizar e a quantidade necessária. As amostras são enviadas com um COA para que você possa comparar o lote com o material atual.
E se um COA não corresponder à especificação acordada?
Envie-nos a especificação acordada e o COA mostrando a diferença (parâmetro, unidade e método de teste). Verificamos com o registro do lote de produção antes de você aceitar o material, e substitua ou teste novamente quando o lote estiver fora das especificações.
