High photostability
Triazine chemistry keeps absorbing over long exposure.
SUNSORB® 400
UV-400 Triazine UV Absorber Supplier for Coatings
SUNSORB® 400 is a liquid hydroxyphenyl-triazine UV absorber for high-durability automotive, industrial and wood coatings. Triazines offer very high photostability and resistance to loss during baking.
CAS 153519-44-9 · Hydroxyphenyl-triazine · Liquid UV absorber
- Lot COA with every shipment
- Samples for your trials
- Technical support for your trial
Product overview & key benefits
UV-400 is a hydroxyphenyl-triazine (HPT) UV absorber supplied as a liquid for easy incorporation into coatings. HPT absorbers keep their absorption over long exposure, which is why they are used in automotive clear coats and demanding industrial finishes, usually with a HALS.
Bake resistance
Low loss in high-temperature cure.
Liquid format
Easy incorporation into coatings.
Technical specifications
| Parameter | Typical value |
|---|---|
| Product Name | UV Absorber UV-400 |
| Brand | SUNSORB® 400 |
| CAS No. | 153519-44-9 |
| Chemistry | Hydroxyphenyl-triazine |
| Appearance | Light-yellow viscous liquid |
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 400 is normally used and what to confirm before your trial.
Automotive Clear Coats
Typically 1–3% on binder solids with a HALS such as 292 or 123.
Check before trial
- Clear coat type
- Bake conditions
- Durability target
Industrial Coatings
For coil, industrial and plastic coatings with high durability requirements.
Check before trial
- Binder system
- Cure conditions
- Exposure
Wood Coatings
Long-term UV protection for exterior wood finishes.
Check before trial
- Waterborne or solvent-borne
- Wood species
- Exposure
Selection & comparison
Selecting a UV Absorber
| Your requirement | What usually works |
|---|---|
| Clear or light-colored polyolefin parts and film | Benzophenone (531) or benzotriazole (326) at low loading |
| High processing temperature (PC, PET, 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 | Send your current TDS or COA; we match on chemistry and the parameters you approve |
UV Absorber Comparison
Swipe or scroll horizontally to see all columns →
| Product | Chemistry | Mol. weight | Melting point / form | Best fit | Typical starting level* |
|---|---|---|---|---|---|
| SUNSORB® 400 | Hydroxyphenyl-triazine, liquid | — | Liquid | Automotive and industrial coatings | 1–3% on binder solids |
| SUNSORB® 384-2 | Benzotriazole, liquid | — | Liquid | Coatings | 1–3% on binder solids |
| SUNLIGHT® 292 | Liquid HALS | — | Light-yellow liquid | Coatings | 0.5–2% on binder solids |
| SUNLIGHT® 123 | NOR HALS, liquid | — | Light-yellow liquid | Acid-catalyzed coatings | 0.5–2% on binder solids |
| SUNSORB® 1130 | Benzotriazole, liquid | — | Liquid | Coatings | 1–3% on binder solids |
*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.
Packaging & storage
Packaging
Typically 25 kg pails or 200 kg drums; IBC on request. Confirm the pack in the quotation.
Storage
Keep containers closed, away from heat and direct sun. Warm gently and mix before use if the liquid has thickened in cold weather. See the SDS.
Lead time & terms
Typically 3–15 business days from order confirmation, depending on quantity. FOB, CIF or DAP to major ports.
From first email to approved supply
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, hours, 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.
Tell us your requirement. We match the grade.
Start with your material, part thickness, quantity and destination. Add your current UV package and we will quote against it.
| Information | Example |
|---|---|
| Polymer / Material | PP, PE, ABS, compound, masterbatch |
| Application | Injection molding, extrusion, film, fiber |
| Current additive | Grade or supplier you use today |
| Required specification | Your TDS, COA or key limits |
| Quantity | Trial order / monthly / annual volume |
| Packaging | Standard 25 kg or specific requirement |
| Destination | Country and port |
| Documents needed | COA, SDS, REACH, food-contact statement |
Related products
SUNSORB® 1130
Liquid benzotriazole UV absorber for coatings, often paired with liquid HALS.
View product →UV Absorber UV-400 FAQ
Triazine or benzotriazole?
Triazines (like 400) are more photostable and resist bake loss, so they suit the most demanding coatings; benzotriazoles such as 384-2 are more economical.
What dosage is typical?
1–3% on binder solids with a HALS.
Is it used in plastics?
It is mainly a coatings product. For plastics, ask about solid triazines or benzotriazoles.
Can I get a sample before ordering?
Yes. 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.
