Chimassorb 2020 is a high-performance sterically hindered amine light stabilizer (HALS) with a non-polymeric but highly durable structure. It delivers long-term UV protection with minimal color shift or migration in polyolefins, synthetic fibers, and engineering plastics.
| Property | Typical Value |
|---|---|
| Chemical Name | Bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate |
| CAS No. | 19224-26-1 / 65447-77-0 |
| Appearance | White to off-white granular or powder |
| Molecular Weight | Medium to high |
| Melting Range | 60 – 70 °C |
| Thermal Resistance | Stable to 300 °C |
| Recommended Dosage | 0.1 – 0.8 phr |
| Customer Issue | Solution with Chimassorb 2020 |
|---|---|
| Fiber fading or brittleness under UV light | Ensures color and tensile strength over long periods |
| Additive migration during service | Low volatility structure ensures permanence |
| Staining or discoloration | Non-discoloring formulation even in clear plastics |
| High-temperature processing requirements | Stable under extrusion and molding conditions |
| Demand for light fastness in colored parts | Compatible with pigments without negative interaction |
Q1: Is Chimassorb 2020 suitable for spunbond PP fibers?
Yes. It is widely used in nonwoven fabrics for hygiene, agriculture, and turf applications.
Q2: Can it replace Chimassorb 944 or Tinuvin 770?
It depends on the application. Chimassorb 2020 offers better clarity and color performance, while 944 has lower migration. Blends are common.
Q3: Does it affect pigment dispersion?
No. It is compatible with most pigments and does not interfere with color performance.
Q4: What’s the difference between polymeric HALS and Chimassorb 2020?
Chimassorb 2020 is a low-migration monomeric HALS with excellent durability, while polymeric HALS like Chimassorb 944 offer extremely low volatility but may not suit clear systems.
Q5: Is Chimassorb 2020 safe for food-contact materials?
Please consult regional compliance regulations; it’s often used in indirect contact or approved masterbatches.
