UV Absorber 328

Product Name

UV Absorber 328

Product Code

UV-328

CAS No.

25973-55-1

Chemical Name

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol

Formula

C22H29N3O

Molecular Weight

351.49 

Specification

Appearance：Pale yellow crystalline powder

Melting Point：80-88℃

Loss on drying：0.5%Max

Ash：0.1%Max

Assay (GC)：98.0% Min.

Transmittance：≥93.0%（460nm）；

≥97.0%（500nm）

Packing

25kg/Carton or 25kg/Drum

Application

It is a high efficient UV absorber, which can effectively absorb 270-340 nm UV light. 

The light stability is similar to UV-326 and UV-327, but this product has good dissolubility with the resins.

Its heat volatility is low and its durability to washing is very good.

It is suitable for polyolefin (especially PE), polyester, styrene polymers, polyamide, PMMA, PC, elastomers, etc.