Light stabilizer 622
Struture :
Molecular Formular : C15n+1H25n+4O4n+1N n
Molecular Weight : Mn=3100~4000
CAS NO : 65447-77-0
The sale code name : YS 622
Physical and Chemical Properties:
Appearance and behavior : white to slightly yellow powder , odorless
Loss on drying(%) : ≤0.5
Transmittance : 425nm ≥95.0 ; 500nm ≥98.0
Clarity : transparent solution
PH-Value (1% suspension in water 20~25℃) : 6.3
Melting/Freezing temperature : 50~70℃(softening range)
Density(20℃) : ca 1.22g/cm3
Flash Point : >250℃
Ignition temperature : 370℃
Ash : ≤0.1%
Softening point : 55~70℃
Water solubility (20℃) : ca 1.6mg/L
Vapor pressure (20℃) : 2.5E-6 Pa
Partition coefficient (Log Pow, 20~25℃) : 5.2

Introduction :
YS 622 is the 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.

Application :
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.
The effectiveness of YS 622 surpasses significantly that of UV absorbers , particularly in pigmented systems.

Guidelines for use :
Thick sections UV stabilization of HDPE , LLDPE , LDPE and PP 0.15~0.5%
Films UV stabilization of LLDPE and LDPE 0.1~1.2%
Tapes UV stabilization of HDPE and PP 0.2~0.8%
Fibers UV stabilization of PP fibers 0.1~1.0%

Handling and 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.