Clear plastics
Low color for PC, PMMA and PET.
UV-329 Benzotriazole UV Absorber Supplier
САНСОРБ® 329 (UV-329) is a benzotriazole UV absorber widely used in polycarbonate, полиэстер, PVC and acrylics. It combines strong UV absorption with low color in clear and light-colored parts.
КАС 3147-75-9 · Benzotriazole · UV absorber
Обзор продукта
UV-329 (2-(2H-Бензотриазол-2-Ил)-4-(1,1,3,3-тетраметилбутил)фенол) is a common choice for PC sheet, ДОМАШНИЙ ПИТОМЕЦ, ПВХ, PMMA and styrenics. It is also a frequent replacement for restricted benzotriazoles such as 327 а также 328.
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
Broad compatibility
ПК, полиэстер, ПВХ, styrenics and acrylics.
Replacement option
Common alternative to restricted 327 а также 328.
Технические характеристики
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 |
|---|---|
| Название продукта | UV Absorber UV-329 |
| Бренд | САНСОРБ® 329 |
| Номер КАС. | 3147-75-9 |
| Химическое название | 2-(2H-Бензотриазол-2-Ил)-4-(1,1,3,3-тетраметилбутил)фенол |
| Молекулярная формула | С20Х25Н3О |
| Молекулярный вес | 323.4 |
| вид | White to light-yellow powder |
| Температура плавления | 103–105 °C |
| анализ | ≥99% |
| Volatile Matter | ≤0,5% |
| Пепел | ≤0,1% |
Applications by Material
Pick an application to see how 329 is normally used and what to confirm before your trial.
Polycarbonate & Acrylics
UV protection for PC sheet and acrylic parts, typically 0.1–0.5%.
What to confirm for your application
- Sheet or part thickness
- Clarity requirement
- Outdoor exposure
ДОМАШНИЙ ПИТОМЕЦ & Polyester
Protects polyester bottles, film and fiber.
What to confirm for your application
- Polymer and process
- Температура обработки
- Color requirement
ПВХ & Styrenics
UV absorber for PVC and styrenic compounds.
What to confirm for your application
- Compound type
- Exposure
- Existing stabilizers
Упаковка & Storage
Упаковка
25 kg net bags or cartons with a PE inner liner. Palletized; private-label packing on request.
Storage
Keep sealed in a cool, сухой, ventilated place away from heat and direct sun. See the SDS for full handling details.
Время выполнения & terms
Typically 3–15 business days from order confirmation, depending on quantity. ФОБ, CIF or DAP to major ports.
Technical & Buying Information
UV Absorber UV-329 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, часы, 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-329
Start with your material, part thickness, количество и назначение. Add your current UV package and we will quote against it.
| Information | Example |
|---|---|
| Polymer / Material | ПП, ЧП, АБС, сложный, маточная смесь |
| Приложение | Injection molding, экструзия, фильм, волокно |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| Упаковка | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | сертификат подлинности, паспорт безопасности, ДОСТИГАТЬ, food-contact statement |
Related UV Absorbers & Стабилизаторы
UV Absorber UV-329 FAQ
329 или же 234 for polycarbonate?
Both are used. 234 has higher molecular weight and lower volatility for very high processing temperatures; 329 is a cost-effective standard.
Can 329 replace 328?
Often yes in plastics, depending on polymer and process. Re-run your weathering test after switching.
What dosage is typical?
0.1–0.5% depending on thickness and exposure.
Can I get a sample before ordering?
Да. 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-329 Requirements
Send your application, specification and quantity to request a quotation or supporting documents.