Specification
Light Stabilizer LS 944 (also known as Light Stabilizer 944) is a high molecular weight polymeric hindered amine light stabilizer (HALS) with the chemical name poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]]. As a polymeric HALS, LS 944 possesses multiple functional groups and exhibits excellent light stabilization performance.
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Molecular Formula: (C35H68N8)n |
Molecular Weight: 2000-3100 g/mol |
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CAS No: 71878-19-8 |
Appearance: White or slight yellowish powder/granule |
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Assay:99% |
Melting point(℃): 110.00-130.00℃ |
Features
LS 944 With a high molecular weight, it shows excellent compatibility, high resistance to extraction and low volatility.
Applications
LS 944 is widely suitable for the following polymers and material systems:
| Application Field | Specific Materials |
|---|---|
| Polyolefins | PP (Polypropylene, including injection molding, film materials, and fibers), PE (Polyethylene, including LDPE, HDPE, cross-linked polyethylene), TPO |
| Olefin Copolymers | EVA (Ethylene-Vinyl Acetate Copolymer) films |
| Styrenics | PS (Polystyrene), ABS |
| Engineering Plastics | Polyamide (Nylon), Polyacetal (POM), PMMA (Acrylic) |
| Polyvinyl Chloride | Flexible and rigid PVC, PVC blends |
| Polyurethanes | Polyurethane, polyurethane fibers |
| Others |
Rubber, viscose fibers, specialty adhesives, styrenic elastomers |
Product Types
Low-density polyethylene films, agricultural films (addition level: 0.2%)
PP tapes, PP fibers
EVA films
Pipes, fittings
Food packaging materials
Recommended Addition Levels
| Application Type | Recommended Addition Level |
|---|---|
| General Range | 0.05 - 1.0% |
| Agricultural Films | 0.2% |
| Polyolefin Thin Products | Depends on specific application; it is recommended to determine through trials |
Note: The specific addition level should be determined through trials based on the substrate type, product thickness, and performance requirements of the final product.
Synergistic Effects
Use in combination with low molecular weight HALS: Exhibits synergistic effects when used together with low molecular weight light stabilizers (such as LS 770, UV 3853).
Use in combination with other high molecular weight HALS: Produces synergistic effects when combined with high molecular weight HALS (such as LS 622).
Use in combination with UV absorbers: Can be used in combination with UV absorbers. Due to its special structure and high molecular weight, the synergistic effect is significant.
Functional synergy: When used with appropriate stabilizers, it can effectively prevent issues such as yellowing, gloss loss, cracking, and chalking.
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