Low volatility
High MW keeps it in the polymer at high processing temperatures.
SUNSORB® 234
UV-234 Benzotriazole UV Absorber Supplier
SUNSORB® 234 (UV-234) is a high-molecular-weight benzotriazole UV absorber with very low volatility. It is designed for polymers processed at high temperatures, such as PC, BICHO DE ESTIMAÇÃO, PA and their blends.
CAS 70321-86-7 · Benzotriazole · UV absorber
- Lote COA com cada remessa
- Amostras para seus testes
- Suporte técnico para seu teste
Visão geral do produto & principais benefícios
UV-234 (2-(2H-benzotriazol-2-il)-4,6-bis(1-metil-1-feniletil)fenol) has a molecular weight of 447.6 and stays in the polymer during high-temperature processing. It is used in polycarbonate, polyesters, poliamidas, PC/ABS and automotive coatings.
Plásticos de engenharia
Designed for PC, BICHO DE ESTIMAÇÃO, PA and their blends.
Durable protection
Good long-term retention in thin and thick parts.
Especificações técnicas
| Parâmetro | Valor típico |
|---|---|
| Nome do produto | UV Absorber UV-234 |
| Marca | SUNSORB® 234 |
| Nº CAS. | 70321-86-7 |
| Nome Químico | 2-(2H-Benzotriazol-2-il)-4,6-bis(1-metil-1-feniletil)fenol |
| Fórmula Molecular | C30H29N3O |
| Peso molecular | 447.6 |
| Aparência | Light-yellow powder |
| Ponto de fusão | 137–141 °C |
| Ensaio | ≥99% |
| Volatile Matter | ≤0,5% |
| Cinzas | ≤0,1% |
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 Material
Pick an application to see how 234 is normally used and what to confirm before your trial.
Polycarbonate & PC Blends
UV protection for PC sheet, glazing and PC/ABS parts.
Verifique antes do teste
- Part thickness
- Temperatura de processamento
- Clarity requirement
BICHO DE ESTIMAÇÃO, PBT & Polyester
UV absorber for polyester film, fiber and molded parts.
Verifique antes do teste
- Process and temperature
- Thickness
- Color requirement
Poliamida & Automotive Coatings
Used in polyamide parts and automotive coatings.
Verifique antes do teste
- System type
- Exposure
- HALS used
Seleção & comparação
Selecting a UV Absorber
| Sua necessidade | O que geralmente funciona |
|---|---|
| Clear or light-colored polyolefin parts and film | Benzophenone (531) or benzotriazole (326) at low loading |
| High processing temperature (computador, BICHO DE ESTIMAÇÃO, PA) | Low-volatility grades: 234, 360 or 1577-type triazines |
| Thin films and fibers | Higher-MW, low-volatility grades so the absorber is not lost in processing |
| Solvent-borne and waterborne coatings | Liquid benzotriazoles (384-2, 1130) or triazine (400), paired with a HALS |
| Outdoor service longer than one season | UV absorber plus a HALS; the absorber filters, the HALS stops radical chains |
| Exports to the EU | Check REACH status first; some benzotriazoles (327, 328) are restricted |
| Replacing an existing grade | Envie seu TDS ou COA atual; we match on chemistry and the parameters you approve |
UV Absorber Comparison
Swipe or scroll horizontally to see all columns →
| Produto | Chemistry | Mol. peso | Ponto de fusão / form | Best fit | Typical starting level* |
|---|---|---|---|---|---|
| SUNSORB® 234 | Benzotriazole | 447.6 | 137–141 °C | computador, BICHO DE ESTIMAÇÃO, PA at high temperature | 0.1–0,5% |
| SUNSORB® 329 | Benzotriazole | 323.4 | 103–105 °C | computador, BICHO DE ESTIMAÇÃO, PVC, PMMA | 0.1–0,5% |
| SUNSORB® 360 | Bis-benzotriazole | 658.9 | ≥195 °C | computador, BICHO DE ESTIMAÇÃO, PBT, thin parts | 0.1–0,5% |
| SUNSORB® 326 | Benzotriazole (Cl) | 315.8 | 138–141 °C | PP, Educação Física, PVC, adesivos | 0.1–0,5% |
| Sunlight® 770 | Monomeric HALS | 480.7 | White powder or granule | Thick PP, Educação Física, estirênico | 0.1–0,5% |
*Starting points for trials, not fixed recommendations. Loading depends on part thickness, pigment, target service life and the HALS used alongside. UV absorbers and HALS work by different mechanisms and are usually combined.
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
Define the exposure
Indoor light behind glass, outdoor temperate climate and desert or tropical exposure need very different packages. Note the target service life and the weathering test you use (xenon or QUV, horas, ΔE or gloss retention).
Match absorber to process and thickness
A UV absorber works by filtering, so it needs enough path length: thick parts need less, thin films and fibers need more and need a low-volatility grade. Check the absorber survives your processing temperature.
Combine with a HALS
For outdoor use the standard approach is UV absorber plus HALS. Send your current package and pigment system and we suggest a starting combination for the trial.
Check regulations before you buy
Some benzotriazoles are restricted in the EU and other markets. Tell us the destination and end use, and we confirm the REACH and food-contact position of the grade before you order.
Diga-nos sua necessidade. Nós combinamos a nota.
Comece com seu material, espessura da peça, quantidade e destino. Add your current UV package 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
UV Absorber UV-234 FAQ
When is 234 better than 329?
When processing temperature is high or sections are thin, 234's lower volatility gives better retention.
What dosage is typical?
0.1–0.5% in plastics; confirm with your weathering test.
Can 234 replace 327 ou 328?
In many engineering-plastic applications, sim. A weathering re-test is 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.
