With the continuous expansion of polymer material applications, low molecular weight HALS have been difficult to meet some high temperature processing environments and applications with high standards of material weathering because of the defects of easy migration, volatility, and intolerance of extraction.
In recent years, the development of high molecular weight HALS has gradually become a hot spot in global polymer additive market.
Although high molecular weight HALS is resistant to extraction and difficult to volatilize, the larger molecular weight may lead to poor migration performance of HALS in polymer materials, which is not conducive to the replenishment of light stabilizers from the inside out, and on the contrary, affects the normal play of its light stabilizing effect.
The key to solve this application contradiction is to adjust the molecular quality of the light stabilizer to the optimal range!
After continuous research, it is found that the molecular mass of high molecular weight HALS is controlled at 1500-3000 g/mol, which is more suitable. The stabilizer is resistant to migration, while its light stabilization effect and dispersion are also excellent.
ØOMNISTAB HALS with High molecular weight：
vOMNISTAB UV3529
Chemical structure of UV3529
Key benefits：
OMNISTAB® UV3529 is a polymeric HALS with dual function of hindered amine group and triazine group, which has the characteristics of high temperature resistance, extraction resistance, low weight loss, and good light stabilizing efficiency.
It is a long-lasting light stabilizer for PP/PE and polyolefin composites, and is also suitable for other material systems with high weathering requirements.
vOMNISTAB LS3346
Chemical structure of LS3346
Key benefits：
OMNISTAB LS3346 has similar structure with UV3529, also belongs to low volatile polymer hindered amine light stabilizers. LS3346 has good compatibility with most polyolefins and excellent synergistic effect with other UV absorbers.
Moreover, LS3346 fundamentally solves the problem of wide relative molecular mass distribution of HALS, and its high transmittance at 425nm and 450nm is of great practical application value, so it is especially suitable for materials with high requirements on color and light transmittance.
OMNISTAB LS3346 is suitable for polyolefin films, flat wires, fibers, sheets, injection molding products. It can also be used in materials such as ABS, PS, PMMA, SAN, PVC, nylon and polyester.
vOMNISTAB LS119
Chemical structure of LS119
Key benefits：
Thanks to its macromolecular structure, its light stabilizing property is excellent and it is suitable for all polymer materials requiring low volatility and high migration resistance. Therefore, OMNISTAB LS119 is widely used in agricultural films, coatings, adhesives, soft and hard PVC, polyurethane, polyamide fibers and other materials.
vOMNISTAB LS2020
Chemical structure of LS2020
Key benefits：
OMNISTAB LS2020 has excellent UV resistance and thermal stability, low volatility and better compatibility with polymer materials. Its average molecular weight is 2600-3400g/mol, and it has high transmittance, so LS2020 does not affect the color and transparency of the product. OMNISTAB LS2020 can be used in polyolefins (PP, PE), olefin copolymers such as EVA, and other engineering plastics.
