Name: UV Absorber UV-384 (Benzotriazole)
Brand: Coatingsink
SKU: uv-absorber-benzotriazole-uv384
Availability: InStock

Question 1

What wavelength range does UV-384 absorb?

Accepted Answer

UV-384 is a benzotriazole UV absorber with maximum absorption around 345 nm, providing effective protection across the 290–380 nm UV range. This broad coverage shields binders and substrates from both UVA and UVB degradation, making it suitable for exterior and automotive applications.

Question 2

Is UV-384 compatible with waterborne coating systems?

Accepted Answer

Yes. UV-384 can be incorporated into waterborne acrylic and polyurethane dispersions, typically pre-dissolved in a co-solvent such as dipropylene glycol methyl ether before addition. Typical loading in waterborne formulations is 0.3–0.8% on total weight.

Question 3

Why is UV-384 preferred for thick-section coatings?

Accepted Answer

UV-384's low volatility (vapor pressure <0.001 Pa at 20°C) and high molecular weight minimise evaporative losses during curing and service. This ensures the UV absorber remains evenly distributed throughout thick films (>100 µm DFT) over the coating's service life.

Purity	≥98.0%
Appearance	Light yellow crystalline powder
Melting Point	108–113°C
UV Absorption Max	~345 nm
Recommended Dosage	0.2–1.0%

UV Absorber UV-384 (Benzotriazole)

Specifications

FAQ

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