CHIMASSORB 81
CHIMASSORB 81
Chimassorb 81 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability when used in combination with a hindered amine light stabilizer (HALS) of the Chimassorb, Tinuvin® or Uvinul® range. It shows good compatibility with polyolefins and plasticized PVC.
Applications
The main application of this product is in combination with a HALS the light stabilization of low density and linear low density polyethylene as well as ethylene-vinyl acetate copolymers for agricultural films. It can be use d as well as a UV barrier to protect the contents of packages for both industrial and consumer applications. Also, in combination with HALS, Chimassorb 81 can be used in high density polyethylene molded articles, e. g. in crates.
This product also protects a number of other polymers against degradation caused by light exposure such as plasticized PVC and rubbers. It can be used in combination with antioxidants, phosphites and other light stabilizers.
Grades Available
| Chimassorb 81 P (powder) | Chimassorb 81 FF (free flowing granules) |
Features & Benefits
Chimassorb 81 is particularly suitable for thick films, typically > 100 μm and thick sections. The low vapor pressure of Chimassorb 81 prevents losses during processing. Low migration rates reduce the risk of blooming.
Properties
| Physical Properties | Value |
| Melting Range | 47-49°C |
| Flashpoint (DIN 51758) | >200°C |
| Specific Gravity (20°C) | 1.16 g/cm3 |
| Vapor Pressure (20°C) | 4.6 E-6 Pa |
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CHIMASSORB 81 P | CHIMASSORB 81 FF
