Many people may ask, which light stabilizer should I choose? After all, BASF has so many brands of light stabilizers. Select light stabilizers according to specific needs. Because although there are many types of light stabilizers, each type has multiple brands, but each brand has its own differences. For example, UV944 and UV622, which are both polymeric hindered amine light stabilizers HALS, have many differences, and these differences may affect the specific anti-aging effect of polymer materials.
BASF light stabilizer Tinuvin 622 product performance:
Tinuvin 622 is a Oligomeric, stereohindered amine light stabilizer. It is widely used in polyolefins, olefin copolymers such as EVA and polypropylene and elastomeric blends. In addition, the light stabilizer Tinuvin 622 is effective on polyurethane, polyacetal, polyamide, especially nylon 11 and nylon 12, and polyester elastomers.
For applications in pigment systems, Tinuvin 622 outperforms UV absorbers and nickel stabilizers. Tinuvin 622 can produce synergistic effects when mixed with other Tinuvin and Chimassorb UV absorber series. Since the average molecular weight of the oligomeric structure of Tinuvin 622 is approximately 3500, it is extremely suitable for applications requiring low volatility and low mobility. Moreover, Tinuvin 622 is an effective antioxidant, so it has long-term thermal stability for polyolefins and tackifying resins.
BASF light stabilizer Chimassorb 944 product performance:
Basf BASF light stabilizer Chimassorb 944 is A high molecular weight hindered amine light stabilizer, Basf Chimassorb 944 can be used in polyolefin plastics (such as PP, PE), olefin copolymers (such as EVA and mixtures of propylene and rubber, etc.). Since its weight can reach 3000, it is particularly suitable for films and fibers. In addition, BASF’s light stabilizer Chimassorb 944 also functions as an antioxidant and has a relatively long-term thermal stabilization effect on polymers.
Features:
The light stabilizing effect of Chimassorb 944 far exceeds that of UV absorbers (such as 81, 327, etc.) and nickel-containing stabilizers (such as 2002). Especially in pigment systems, its role is even more significant. Chimassorb 944 has a synergistic effect when combined with UV absorbers. Due to the special structure of the polymer, its average molecular weight can reach 3000. It can be used in systems requiring low volatility and small migration, especially in films and fibers.
Light Stabilizer 944 has an antioxidant effect and has a long-term thermal stabilization effect on polymers.
In addition, the special features of Chimassorb 944 are:
· The transparency and color of the resin are not affected.
·Good compatibility with resin.
·Easily dispersed in polymer matrix.
· Its thermal stability and large molecular weight make it non-volatile and non-decomposing at high temperatures.
· Approved by FDA, it can be used in medical and food packaging materials.
· Good fluidity, dust-free, easy to transport and feed.
Chimassorb 944 can be added to the polymer using general methods
