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Hindered Amine Light Stabilizers(HALS)

PowerStab™ 622

Dimethyl succinate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol.

Synonym: Poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol-alt-1,4-butanedioic acid);
Butanedioic acid, 1,4−dimethyl ester, polymer with
4−hydroxy−2,2,6,6−tetramethyl−1−piperidineethano
l
Chemical Structure
Introduction / Features
PowerStab™ 622 is a polymeric hindered amine light stabilizer (HALS) which is effective in a broad range of polymers and applications. It is Non-discoloring, low volatility and excellent resistance to migration, low basicity for reduced interactions with pigments and other stabilizers, and extensive food contact clearances.
Physical Properties
Chemical Name: Dimethyl succinate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol
CAS No.: 65447-77-0
EINECS No.: n.a
Formula: (C15H25NO4)n
Molecular Weight: 3100-4000
Melting Point(°C): 50-70
Specific Gravity[20°C]: 1.22
Vapor Pressure[20°C, Pa]: 2.5E-6
Volatiles(%) Max.0.5
Color of Solution 425nm (%): Min.98
Color of Solution 500nm (%): Min.99
Ash(%): Max.0.1
Appearance: White to yellow granular powder

Solubility (20°C) % w/w
Acetone: 4
Chloroform: >40
Ethyl acetate: 3
Ethanol: 0.08
n-Hexane: <0.01
Methanol: 0.05
Methylene Chloride: >40
Toluene: 15
Water: <0.01

Applications
PowerStab™ 622 is particularly useful in PE applications (injection molding, rotational molding, film, and tape), EVA, PP fibers, polyurethanes, polyacetals, elastomers, adhesives, and sealants. It is also an excellent light stabilizer for systems containing carbon black.
Typical addition levels for PowerStab™ 622 range from 0.05-1.5%, depending upon the application. The exact level to be used in any particular application should be determined in an appropriate testing program.
Packings
PowerStab™ 622 is supplied in 25kg net/carton.
Technical Library
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