UV-329

Other trade Name: UV-5411

Chemical Name: 2- (2'-Hydroxy-5'-tert-octylphenyl) benzotriazole

Synonyms: 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol; TINUVIN 329

Formula: C₂₀H₂₅N₃O

Structure:

CAS NO.: 3147-75-9

Molecular Weight: 323.4

Appearance: White powder

Purity: ≥99%

Melting Point: 103-105.3 ^°C

Ash: ≤0.1%

Loss On Drying: ≤0.3%

Transmittance: 440 nm≥97% 500 nm≥98%

Advantage and Application:

1. This product is an excellent high-efficiency, aging-preventing agent, which can
effectively absorb 270-380 nm UV light.

2. Non-flammable, non-explosive, non-toxic, harmless to health.

3. This product almost does not absorb visible light, particularly applicable to colorless
and light-colored products.

This product is suitable for polyester, rigid PVC, PS, PMMA, PC, ABS resin, etc. It effects
better in a transparent products and engineering plastics under high temperature processing. This product can also be used for polyolefin.

Guidelines for use:

The use levels of UV-329 range between 0.1 and 1.0 %, depending on substrate and performance requirements
of the final application. The product can be used alone or in combination with other additives such as light stabilizers (hindered amines), antioxidants (hindered phenols, phosphites, thiosynergists, hydroxylamines), and other
functional stabilizers and additives. The use of UV-329 in combination with hindered amine light stabilizers is particularly noteworthy in that a synergistic performance is often observed. Performance data of UV-329 alone
or in combination with other additives are available in selected substrates.

Package: 25KG cartons or drums

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