Low Molecular Weight Hindered Amine Light Stabilizer (HALS)

Characterization  YS 622 is the light stabilizer of choice for all applications calling for low volatility and minimal migration, because of its oligomeric structure with high molecular weight. Furthermore YS 622 is effective as antioxidant and contributes significantly to the long term heat stability of polyolefins and tackifier resins.

Chemical Name  Butanedioic acid, dimethylester, polymer with 4-hydroxy -2,2,6,6-tetramethyl-1-piperidine ethanol.CAS Number 65447-77-0Structure YS 622Molecular Weight Mn = 3100 - 4000

Applications YS 622 areas of application include polyolefins (PP, PE), olefin copolymers such as EVA as well as blends of polypropylene with elastomers. In addition YS 622 is highly effective in polyacetals, polyamides and polyurethane applications.

Features / Benefits The effectiveness of YS 622 surpasses significantly that of UV absorbers, particularly in pigmented systems. Combinations of YS 622 with UV absorbers.Guidelines for use    
Thick sections  UV stabilization of HDPE, LLDPE, LDPE and PP 0.15-0.5%Films  UV stabilization of LDPE and LLDPE   0.1-1.2%Tapes  Ustabilization of HDPE and PP     0.2-0.8%Fibers  UV stabilization of PP fibers          0.1-1.0%Physical and Chemical Properties Appearance and behaviour White to slightly yellow powder, odorlessPH-value (1% suspension in water 20~25°C)  6.3Melting / freezing temperature  50~70°C (softening range)Boiling point/ range  not applicableDensity (20°C) ca  1.22g/cm3Flash point >250°CIgnition temperature 370°COxidizing properties not testedSelf-ignition temperature not testedWater solubility (20°C) ca  1.6mg/LVapor pressure (20°C)  2.5 E-6 PaPartition coefficient (Log Pow, 20~25°C)  5.2Explosive properties  not testedHandling & Safety  In accordance with good industrial practice, handle care and prevent contamination of the environment. Avoid dust formation and ignition sources. For more detailed information please refer to the material safety data sheet.