Heat-aging synergist
With a phenolic antioxidant it extends oven-aging life far beyond either component alone.
SUNNOX® DSTDP
DSTDP Thioester Antioxidant Supplier
SUNNOX® DSTDP (tiodipropionato de distearil) is a thioester secondary antioxidant with low volatility. Combined with a phenolic primary, it extends the heat-aging life of polyolefins, ABS and rubber.
CAS 693-36-7 · Thioester · Secondary antioxidant
- Lote COA com cada remessa
- Amostras para seus testes
- Suporte técnico para seu teste
Visão geral do produto & principais benefícios
DSTDP decomposes hydroperoxides during long service at elevated temperature and works in strong synergy with hindered phenols such as 1010. Its longer alkyl chains give a higher melting point (63–69 °C) and lower volatility than DLTDP, which suits higher processing temperatures and parts that stay hot in use.
Lower volatility
Higher molecular weight than DLTDP, so less is lost at high processing temperatures.
Proven in polyolefins
Widely used in PP and PE parts for appliances, automotive and pipe.
Especificações técnicas
| Parâmetro | Valor típico |
|---|---|
| Nome do produto | DSTDP antioxidante |
| Marca | SUNNOX® DSTDP |
| Nº CAS. | 693-36-7 |
| Nome Químico | Distearyl 3,3'-thiodipropionate |
| Fórmula Molecular | C42H82O4S |
| Peso molecular | 683.2 |
| Aparência | White powder or flake |
| Ponto de fusão | 63–69 °C |
| Acid Value | ≤0.05 mg KOH/g |
| Volatile Matter | ≤0.05% |
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 an application to see how DSTDP is normally used and what to confirm before your trial.
Poliolefinas
Used with 1010 in PP and PE parts with long heat-aging requirements; fenólico:DSTDP ratios of 1:1 para 1:3 are common.
Verifique antes do teste
- Heat-aging test (temperatura, horas)
- Phenolic antioxidant and level
- Odor requirements
abdômen & Styrenics
Improves long-term heat stability of ABS and HIPS with a phenolic antioxidant.
Verifique antes do teste
- Grade and other additives
- Service temperature
- Color target
Borracha & Adesivos
Used as a heat-aging synergist in rubber compounds and adhesives.
Verifique antes do teste
- Base polymer
- Cure and service temperature
- Existing antioxidant package
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® DSTDP | Thioester · secondary | 683.2 | 63–69 °C | Heat-aging synergist, menor volatilidade | 0.1–0.3% with a phenolic |
| SUNNOX® DLTDP | Thioester · secondary | 514.8 | 38–42 °C | Heat-aging synergist | 0.1–0.3% 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® DTDTP | Thioester · secondary | 542.9 | Líquido | Heat-aging synergist, pourable | 0.1–0.5% 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 with a PE inner liner. Palletized; private-label packing on request.
Armazenar
Keep sealed in a cool, seco, ventilated place away from heat and direct sun. 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® DLTDP
Thioester secondary antioxidant that boosts long-term heat aging when used with a phenolic.
Ver produto →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® DTDTP
Liquid thioester synergist for ABS, PP and adhesives where a pourable additive is easier to dose.
Ver produto →Antioxidant DSTDP FAQ
DSTDP or DLTDP?
Choose DSTDP for higher processing temperatures and lower volatility; choose DLTDP when you need easy dispersion at low temperature.
What ratio with 1010?
1:1 para 1:3 (1010:DSTDP) is a common starting range for heat-aging packages. Confirm in your oven-aging test.
Can I use DSTDP with HALS?
Thioesters can reduce HALS efficiency in outdoor applications. For outdoor parts, tell us the package and we suggest an alternative synergist if needed.
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.
