Unitechem LS 3853

Hindered Amine Light Stabilizer — Fatty Acid Ester Type

UNITECHEM LS-3853

Low Volatility Waxy HALS  |  UV-3853 / HA-18 Equivalent
CAS No.  167078-06-0

Chemical Name

2,2,6,6-Tetramethyl-4-piperidinyl stearate
Fatty acids, C16–C18 (predominantly stearate / palmitate), 2,2,6,6-tetramethyl-4-piperidinyl esters  /  Octadecanoic acid, 2,2,6,6-tetramethyl-4-piperidinyl ester

Typical Properties
CAS No. 167078-06-0
Molecular Formula C₂₇H₅₃NO₂
Molecular Weight 423.72 g/mol
Appearance White to off-white waxy solid
Melting Point ≥ 28°C
Density @20°C 0.913 g/cm³
Saponification Value 128 – 137 mg KOH/g
Volatiles ≤ 1.5%
Ash ≤ 0.1%
Transmittance ≥75% @ 425 nm  /  ≥85% @ 500 nm
Standard Packaging 25 kg carton (inner PE bag)
Recommended Level 0.1 – 1.0%
Molecular Structure
LS-3853 Molecular Structure

Product Features & Applications

Key Features


Fatty acid ester HALS — unique C16–C18 stearate/palmitate ester structure gives outstanding compatibility and solubility in polyolefins with no bloom or migration

Excellent colour stability, gloss retention and durability — protects plastic surfaces from UV-induced yellowing, chalking and gloss loss

Synergistic with other HALS and UV absorbers — especially LS-944, LS-119 and UV-328 for maximum anti-aging performance at lower total loading

Available as masterbatch concentrate (3853PP5) — 50% active in PP carrier resin for easy metering in PP film, tape and injection moulding applications

Low volatility and anti-precipitation — waxy form and high MW fatty acid chain greatly reduce volatility loss during high-temperature processing

Broad polymer compatibility — suitable for polyolefins, PU, ABS, SAN, PA, POM, rubber, coatings and adhesives

Applications

LS-3853 is particularly effective in polyolefin plastics (PP, PE), especially for PP and TPO automotive exterior/interior parts, PP films and tapes, TPO roofing membranes and PP outdoor furniture. Also used as a light stabilizer in polyacetal, polyamide, styrenic polymers and polyurethane. Can be incorporated as a neat solid or as the 3853PP5 masterbatch concentrate for precision dosing in PP applications.

PP / PE
TPO
ABS / SAN
PA (Nylon)
POM (Polyacetal)
PU (Polyurethane)
Rubber & Elastomer
Coatings & Adhesives
PP Film & Tape
Geotextile

Industries
🚗
Automotive
🌿
Agriculture
🏃
Sports & Outdoor
📦
Packaging
🏗️
Building & Construction
🧵
Textiles & Fiber
🌞
Coatings & Adhesives
🔋
Renewable Energy

Need Technical Support or a Quote?
Our technical team can provide application guidance, formulation recommendations and sample requests for LS-3853.

Contact Us →