UV Absorber 326

Chemical Name: 2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)-5-

chlorobenzotriazole

Synonyms: Bumetrizole; TINUVIN 326

Formula: C₁₇H₁₈N₃OCl

Structure:

CAS NO.: 3896-11-5

Molecular Weight: 315.8

Appearance: Yellowish crystalline powder

Purity: ≥99%

Melting Point: 137-142 ^°C

Ash: ≤0.1%

Loss On Drying: ≤0.5%

Transmittance: 460 nm≥93% 500 nm≥96%

Advantage and Application:

UV Absorber 326 is especially suited for polyolefins and cold cured polyesters.

UV Absorber 326 has a wide range of indirect food approvals in polyolefins. It has a low volatility at high temperatures and high resistance to thermal degradation and can therefore be used without significant loss or decomposition in the polyolefin compounding and molding processes. In the use for the UV protection of polyester resins. UV Absorber 326 does not form colored complexes with the metallic salts used for the curing process of these resins.

Guidelines for use:

It is recommended to use UV Absorber 326 with a HALS type light stabilizers system for best results. The recommended concentrations range for PP applications from 0.1-0.5%, for PE applications from 0.1%-0.4%.

Package: 25KG cartons or drums

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