Technical Specifications

CAS No.: 127519-17-9, 108-65-6

Appearance: Pale yellow liquid

Dynamic Viscosity (20 °C): ≥3200 cps

Density (20 °C): 1.0718 g/cm³

Transmittance Spectrum (1 cm path length cuvette): 

Top curve: 0.001% Tinuvin 384-2, equivalent to 0.25% loading in a 40 μm film • Second curve: 0.002% Tinuvin 384-2, equivalent to 0.50% loading in a 40 μm film • Third curve: 0.004% Tinuvin 384-2, equivalent to 1.0% loading in a 40 μm film • Bottom curve: 0.006% Tinuvin 384-2, equivalent to 1.5% loading in a 40 μm film

Absorption Spectrum:

Top curve: 0.001% UV384-2T, equivalent to 0.25% loading in a 40 μm film Second curve: 0.002% UV384-2T, equivalent to 0.50% loading in a 40 μm film Third curve: 0.004% UV384-2T, equivalent to 1.0% loading in a 40 μm film Bottom curve: 0.006% UV384-2T, equivalent to 1.5% loading in a 40 μm film

Product Overview

RQT® UV384-2T is a liquid UV absorber of the hydroxybenzotriazole class, specially developed for coatings. It features outstanding thermal stability and environmental durability, making it highly suitable for coatings subjected to high-bake cycles and/or extreme ambient conditions. UV384-2T is engineered to meet the high-performance and durability requirements of premium automotive and industrial coatings. Its broad UV absorption capability effectively protects UV-sensitive primers or substrates such as wood and plastics.

Performance Features

1. Multi-functional hydroxybenzotriazole UVA for solvent-borne coatings
2. Excellent spectral coverage across the UV range
3. Superior light stability and thermal stability

Typical Applications

UV384-2T is recommended for the following fields: Automotive coatings General industrial applications such as coil coatings and wood coatings.

The liquid form of UV384-2T facilitates incorporation into solvent-borne systems. When combined with HALS stabilizers such as 292, 249 or 123, it improves the durability of clear coats by suppressing or delaying failures including gloss loss, cracking, color shift, blistering and delamination. For optimal performance, the required dosage of UV384-2T shall be determined via laboratory trials.

Application & Dosage

UV384-2T: 1.0 – 3.0% UV 123, UV 249 or UV 292: 0.5 – 2.0% (Concentrations based on weight percent of binder solids)