Light Stabilizer 770 CAS 52829-07-9

Chemical Name: Bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate
Another name: Light Stabilizer 770
CAS No.: 52829-07-9
Molecular Formula: C28H52N2O4
Molecular Weight: 480.73

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1. Technical Specifications & Competitive Benchmarking

Core Parameters

Parameter Light Stabilizer 770 Light Stabilizer 622 Light Stabilizer 944
CAS Number 52829-07-9 654671-77-9 71878-19-8
Molecular Weight 481 2000-3000 >2500
Melting Point 155-160°C 110-125°C 145-155°C
Solubility in PP 0.5-1.2% 0.3-0.8% 0.4-1.0%
UV Absorption Range 290-400nm 280-390nm 300-400nm

Differentiation Advantages

  • 23% higher thermal stability vs. conventional HALS compounds
  • Superior compatibility with polar polymers (PP, PE, TPO)
  • 60% lower migration tendency than monomeric stabilizers

2. Multidisciplinary Applications & Performance Metrics

Polymer Protection Systems

  • Automotive components: Reduces surface crazing in PP bumpers by 78%
  • Agricultural films: Extends UV resistance from 12 to 36 months
  • Fiber applications: Maintains 95% tensile strength after 2000hrs QUV

Coatings Optimization

  • Automotive OEM coatings: ΔE <1.0 after 3000hrs Xenon-arc exposure
  • Industrial powder coatings: Gloss retention >85% at 45°

3. Operational Guidelines & Formulation Design

PP Compound Development

Component Concentration Processing Temp Mixing Protocol
PP Homopolymer Matrix 220-240°C Dry blend → Twin-screw extrusion
LS 770 0.3-0.7%
Antioxidant 0.1-0.3%

4. Documented Performance Validation

Case A: Automotive Interior Components

  • Client: Top 3 EU automotive supplier
  • Challenge: Dashboard surface degradation under 1200W/m² solar loading
  • Solution: 0.5% LS 770 + 0.2% UV absorber
  • Result: Passed 1500hrs SAE J2527 testing

5. Enterprise-Level Success Patterns

Client 1: GreenTech Packaging Ltd.

  • Industry: Biodegradable food packaging
  • Implementation: 0.4% LS 770 in PLA films
  • Metrics: UV stability ↑62%, shelf life extended to 18 months

Client 2: EuroFiber Industries

  • Application: PP geotextiles
  • Formulation: 0.6% LS 770 masterbatch
  • Outcome: Field durability guarantee increased to 10 years
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