Light Stabilizers (HALS)
Light Stabilizer UV-292
Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate blend
Light Stabilizers (HALS)
Light Stabilizer UV-123
Bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate
Liquid NOR-type low-basicity HALS — the first choice for acid-catalyzed coating systems.
Product Description
UV-123 converts the UV-770 skeleton to a NOR-type (alkoxyamine) structure by alkylating the nitrogen, giving extremely low basicity. It coexists with acid-catalyzed melamine systems, acidic pigments, flame retardants and sulfur residues without deactivation — solving the classic compatibility problem of conventional HALS.
As a clear pale-yellow liquid, UV-123 shows excellent miscibility with common paint solvents such as xylene and MEK (>50 g/100 g), pumps and meters easily, and can be emulsified into waterborne systems — the liquid HALS of choice for automotive refinish, coil/industrial coatings and wood finishes.
Typical dosage is 0.5–2% on resin solids, combined with 1–3% of liquid UV absorbers such as UV-384/UV-1130 for a complete weathering package; it is also used in PP, PU and ABS plastics.
Key Features
- NOR-type structure — low basicity, no deactivation in acid-catalyzed systems
- Liquid form — easy to pump, meter and emulsify
- Miscibility with paint solvents > 50 g/100 g
- One-pack weathering solution with liquid UVAs
Applications
- Automotive refinish and OEM paints
- Acid-catalyzed 2K acrylic/melamine industrial coatings
- Wood coatings and varnishes
- Coil coatings and 1K thermoset acrylics
- PP, PU and ABS plastic parts
Specifications
| CAS No. | 129757-67-1 |
|---|---|
| Molecular Formula | C44H84N2O6 |
| Molecular Weight | ≈ 737 (reaction mixture) |
| Appearance | Clear pale yellow liquid |
| Molecular Weight | ≈ 737 |
| Density (20 °C) | ≈ 1.0 g/cm³ |
| Viscosity (20 °C) | 2900 – 3100 mPa·s |
| Flash Point | ≥ 95 °C |
Packaging & Storage
25 kg plastic drum or 180 kg steel drum. Avoid contact with strong acids; store cool and dry; shelf life 24 months in original sealed packaging.
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