UV Absorber 1130 is a commercial trade name, It's a liquid benzotriazole-based ultraviolet (UV) light absorber used to protect polymers and coatings from UV degradation. Here's a detailed breakdown:
Chemical Composition:
It's a synergistic mixture of two components:
(50%) 2-[2-Hydroxy-3-(α,α-dimethylbenzyl)-5-tert-octylphenyl]-2H-benzotriazole: This is the primary UV-absorbing benzotriazole compound.
(50%) 2-[2-Hydroxy-3-(α,α-dimethylbenzyl)-5-tert-butylphenyl]-2H-benzotriazole: This is a closely related benzotriazole compound.
This blend is designed to offer broad-spectrum UV protection.
Key Properties:
Physical Form: Clear, viscous yellow liquid.
Solubility: Excellent solubility in common organic solvents. Good compatibility with a wide range of polymers.
Low Volatility: High molecular weight contributes to low volatility, reducing loss during high-temperature processing.
Effectiveness: Strong absorption in the critical UV-B (280-315 nm) and UV-A (315-400 nm) ranges.
Low Color Contribution: Minimizes yellowing in the final product compared to some other UVAs.
Primary Function:
To absorb harmful UV radiation and convert it into harmless heat energy.
Protects polymers and coatings from the damaging effects of UV light, which cause:
Loss of gloss and surface chalking
Cracking, brittleness, and loss of mechanical strength
Color fading or yellowing
Loss of adhesion (in coatings)
Typical Applications:
Automotive Coatings: Clearcoats, basecoats, primers (especially valued for its solubility and compatibility).
Industrial Coatings: Wood coatings, plastic coatings, coil coatings.
Plastics: Particularly used in polycarbonate (PC), polyesters (like PET, PBT), PVC, acrylics (PMMA), polyurethanes (PU), and adhesives/sealants.
Inks.
Advantages:
Liquid Form: Easier to handle and incorporate into formulations compared to powders.
Broad Compatibility: Works well in diverse polymer systems and solvent-based coatings.
Low Volatility: Suitable for high-temperature processing (e.g., engineering thermoplastics).
Good Performance/Cost Ratio: Effective protection at competitive loadings.
Synergistic Blend: The mixture offers broader protection than either component alone.
Important Considerations:
Trade Name: "UV Absorber 1130" is primarily BASF's Tinuvin® 1130. Other suppliers might use similar numbering schemes for different products.
Regulatory: Compliance status (REACH, FDA, etc.) depends on the specific application and region. Always consult the latest Safety Data Sheet (SDS) and technical bulletins from the supplier.
Dosage: Optimal loading levels vary significantly depending on the polymer/coating matrix, thickness, required durability, and other stabilizers used (e.g., HALS - Hindered Amine Light Stabilizers). Typical ranges are 0.1% to 2.0% by weight.
Safety: Handle according to SDS recommendations (e.g., wear gloves, eye protection). Generally considered low hazard with proper handling.
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