Light Stabilizer UV-2908

Chemical Name: Hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate

Synonyms: 3,5-di-t-Butyl-4-Hydroxybenzoic Acid, Hexadecyl Ester; UV-2908; Hexadecyl-3,5-bis-tert-butyl-4-hydroxybenzoate; Palmitoyl-3,5-di-tert.butyl-4-hydroxybenzoate.

CAS Number: 67845-93-6

Molecular formula：C31H₅₄O₃

Molecular weight: 475

Molecular structure

  

Specifications:

Item	Specification
Appearance	White to faint yellow powder
Melting point, ℃	≥58
Assay，%	≥ 98
Chroma，APHA	≤ 60
Loss on drying，%	≤ 0.5

Properties: It is white to faint yellow powder. The specific gravity is 1.07 at 25℃. It is easy soluble in toluene, chloroform, hexane, soluble in acetone etc.

Uses: The product belongs to the class of hindered hydroxybenzoate light stabilizer. UV-2908 is most suitable for the protection of polyolefins, polycarbonate and the systems containing flame retardants and thioesters. It can be used alone or in combination with benzophenone UV stabilizer or phosphite antioxidant, showing good synergistic effect.

    The dosage of UV-2908 ranges between 0.25% and 1% are recommended for protection. It depends on the substrate and performance requirement of the final application.

Performance Benefits

Low volatility, minimal color contribution, good chemical stability, acid and alkali resistant, excellent compatibilty with UV absorbers, HALS, and thioesters, FDA sanctioned to 0.5% in polyolefins

Storage: Closed storage in a cool, dry place

Package: 20, 180kg/drum or as customer require. 

Expiration Date: 1 years