LOTSORB UV 326 (CAS:3896-11-5)

Characterization

Lotsorb® UV 326 is a UV absorber of the hydroxyphenylbenzotriazole class, which imparts outstanding  light stability to plastics and other organic substrates.

Chemical name

Phenol, 2-(5-chloro-2H-benzotriazole-2-yl)-6-(1,1-dimethylethyl)-4-methyl

CAS number

3896-11-5

Structure

Molecular weight

315.8 g/mol

Applications  

Lotsorb® UV 326 is especially suited for polyolefins and cold cured polyesters.  UV 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 326 does not form colored complexes  with the metallic salts used for the curing process of these resins.

Product Forms

Appearance:Yellowish powder or granule

Guidelines for use

Polyolefins:

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

0.1% to 0.4%.

Polyester resins:

The recommended levels for normal polyester resins range from 0.2% to 0.3%, while for chlorinated, flame retardant polyester resins the recommendation is 0.5%.

Physical Properties

Absorption Spectrum (10 mg/l, Chloroform)

Lotsorb® UV 326 exhibits strong absorbance in the 300-400 nm region and minimal absorption in the visible region (> 400 nm) of the spectrum. The absorption maxima are at 312 nm and 353 nm (ε=15600 I/molcm) in chloroform solution.

Handling & Safety

In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Avoid continuous or repetitive breathing of dust. Use only with adequate ventilation. Prevent contamination of the environment. Avoid dust formation and ignition sources. For more detailed information please refer to the material safety data sheet.

Packaging and Handling

Packaging: 20Kg or 25Kg/Carton

Store the product in a cool, dry, well-ventilated area away from incompatible materials. Unless stated, proper storage will permit usage of the product for 12 months from the manufacture date. For additional handling and toxicological information, consult the Material Safety Data Sheet.