Low volatility
High MW keeps it in the polymer at high processing temperatures.
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, ANIMAUX, PA and their blends.
CAS 70321-86-7 · Benzotriazole · UV absorber
Présentation du produit
UV-234 (2-(2H-benzotriazole-2-yl)-4,6-bis(1-méthyl-1-phényléthyl)phénol) has a molecular weight of 447.6 and stays in the polymer during high-temperature processing. It is used in polycarbonate, polyesters, polyamides, PC/ABS and automotive coatings.
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
Key Benefits
Plastiques techniques
Designed for PC, ANIMAUX, PA and their blends.
Durable protection
Good long-term retention in thin and thick parts.
Spécifications techniques
Typical specification. Every shipment is supplied with a batch COA; the limits that apply to your order are confirmed in the quotation and contract.
| Parameter | Typical value |
|---|---|
| Nom du produit | UV Absorber UV-234 |
| Marque | SUNSORB® 234 |
| Numéro CAS. | 70321-86-7 |
| Nom chimique | 2-(2H-benzotriazol-2-yl)-4,6-bis(1-méthyl-1-phényléthyl)phénol |
| Formule moléculaire | C30H29N3O |
| Masse moléculaire | 447.6 |
| Apparence | Light-yellow powder |
| Point de fusion | 137–141 °C |
| Essai | ≥99% |
| Volatile Matter | ≤0,5% |
| Cendre | ≤0,1% |
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.
What to confirm for your application
- Part thickness
- Température de traitement
- Clarity requirement
ANIMAUX, PBT & Polyester
UV absorber for polyester film, fiber and molded parts.
What to confirm for your application
- Process and temperature
- Thickness
- Color requirement
Polyamide & Automotive Coatings
Used in polyamide parts and automotive coatings.
What to confirm for your application
- System type
- Exposure
- HALS used
Emballage & Storage
Emballage
25 kg net bags or cartons with a PE inner liner. Palletized; private-label packing on request.
Storage
Keep sealed in a cool, sec, ventilated place away from heat and direct sun. See the SDS for full handling details.
Délai de mise en œuvre & terms
Typically 3–15 business days from order confirmation, depending on quantity. GOUSSET, CIF or DAP to major ports.
Technique & Buying Information
UV Absorber UV-234 Buyer Guide
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, heures, 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.
Request a Quotation for UV Absorber UV-234
Start with your material, part thickness, quantité et destination. Add your current UV package and we will quote against it.
| Information | Example |
|---|---|
| Polymer / Material | PP, PE, abdos, composé, mélange maître |
| Application | Injection molding, extrusion, film, fibre |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| Emballage | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | COA, FDS, ATTEINDRE, food-contact statement |
Related UV Absorbers & Stabilisateurs
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, Oui. A weathering re-test is needed.
Can I get a sample before ordering?
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.
What if a COA does not match our agreed specification?
Send us the agreed specification and the COA showing the difference (parameter, unit and test method). 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.
Discuss Your UV Absorber UV-234 Requirements
Send your application, specification and quantity to request a quotation or supporting documents.