LIGHT STABILIZER 791 (CAS:)

Characterization

Light stabilizer 791 is a synergistic mixture of Chimassorb® 944 and Light stabilizer  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  tapes.

Chemical name

Chimassorb 944: 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

Light stabilizer 770

Applications

Light stabilizer 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.

Features/benefits

 Light stabilizer 791 is an excellent UV stabilizer for thick sections, e. g. automotive  bumpers, fascia, garden furniture etc. The synergism between the high and low molecular weight HALS components  of Light stabilizer 791 guarantees maximum protection for the polymer against  degradation from UV radiation and long-term heat exposure.

Product forms

Code:            Light stabilizer 791 FB 

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

Packaging and handling 

Packaging: 20Kg/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.