Light Stabilizer UV-2908
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
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