Enmai 791 light stabilizer

Light stabilizer 791

 

Product performance: light stabilizer 791 is a mixture of light stabilizers 944 and 770 (HALS), with the synergistic effect of macromolecular and small molecule hindered amine light stabilizers, which can provide the most comprehensive protection of polymer from UV light. It is suitable for thick polypropylene products and provides good surface protection. It also shows good effect in polypropylene flat yarn. 791 is a synergistic mixture of oligomeric hindered amine light stabilizer. Especially for PP thick products, it is an excellent light stabilizer and can provide excellent surface protection. It also shows high stability in PP narrow band.

 

Chemical composition: light stabilizer 944 + light stabilizer 770

 

Physical properties: white to light yellow, tasteless particles

 

Melting point > 50 ℃

 

Flash point > 150 ° C

 

Relative density 1.0-1.2g/l

 

Vapor pressure < 0.01pa (20 ℃)

 

Recommended dosage: PP 0.1-0.8%;

 

Flat wire (PP, HDPE) 0.1-0.8%

 

In colorless or low pigment concentration formula, it is recommended to use it together with UV absorber, and the specific formula dosage should depend on different materials and final performance requirements.

 

Operation and storage: according to the normal operation of industrial products, without special treatment.

 

Application: 791 is an excellent light stabilizer for thick products, such as car bumper, instrument panel, garden table and chair, etc. The synergistic effect between the high molecular weight and low molecular weight hindered amine light stabilizer components in 791 ensures that the polymer is protected from degradation due to ultraviolet radiation and long-term heating. It is recommended to use with ultraviolet absorbers (such as Ciba tinuvin326, tinuvin327, tinuvin328, chimassorb81) in products without coloring or light coloring, or in order to improve the light fastness of certain organic pigments.