- Model NO.: UV-791
- Appearance: Granulars
- Kind: Stabilizer
Characterization UV 791 is a synergistic mixture of light stabilizer 944 and Tinuvin 770.
It is an excellent light stabilizer especially for PP thick sections, which offers
excellent surface protection. It also shows high stabilization efficiency in PP
CAS NO. 71878-19-8 / 52829-07-9
Chemical name Poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]])
Structure light stabilizer 944
Molecular weight Mn = 2000 3100 g/mol
Structure Tinuvin 770
Molecular weight 481 g/mol
Product forms Appearance: white to slightly yellow granules, odorless
Guidelines for use Thick sections*: UV stabilization of PP 0.1 0.8 %
Tapes: UV stabilization of PP 0.1 0.8 %
* The presence of a UV absober (e. g. Tinuvin 326/328 or Chimassorb 81) is recommended in unpigmented or slightly pigmented articles or to improve the light fastness of certain organic pigments.
Physical properties Melting range: approx. 55 °C start
Specific gravity (20 °C): 1.0 1.2 g/cm3
Flashpoint: > 150 °C
Vapor pressure (20 °C): < 0.01 Pa
Applications UV 791 areas of application are PP, blends of polypropylene with elastomers and PA: It can also be used in styrenic polymers, e. g. ABS, impact polystyrene, etc.