PUREstab 565 is a high molecular weight, non-staining, multifunctional phenolic antioxidant primarily used as a post-polymerization process stabilizer for unsaturated elastomers.

Chemical Family: Phenols & Phenolics

Functions: Primary Antioxidant

Compatible Polymers & Resins: Acrylonitrile Butadiene Styrene (ABS), Ethylene Propylene Diene Monomer (EPDM), High-Impact Polystyrene (HIPS), Nitrile Butadiene Rubber (NBR), Polyamides, Polybutadienes, Polyolefins, Styrene Butadiene Rubber (SBR), Styrene Butadiene Styrene (SBS)

Features: Excellent Processing Stability, Good Color Stability, Good Stain Resistance, High Molecular Weight, Low Odor, Low Volatility

Synonyms: 1-(3,5-Di-tert-butyl-4-hydroxyanilino)-3,5-bis(octylthio)-s-triazine, 2-(4-Hydroxy-3,5-di-tert-butylanilino)-4,6-bis(octylthio)-1,3,5-triazine, 2-(4-Hydroxy-3,5-di-tert-butylanilino)-4,6-bis(octylthio)-s-triazine, 2-(4-Hydroxy-3,5-di-tert-butylanilino)-4,6-di(octylthio)-s-triazine, 2,4-Bis-(n-octylthio)-6-(4-hydroxy-3,5-di-tert-butylanilino)-1,3,5-triazine, 2,4-Bis-(n-octylthio)-6-(4-hydroxy-3′,5′-di-tert-butylanilino)-1,3,5-triazine, 2,4-Bis(n-octylthio)-6-(3,5-di-tert-butyl-4-hydroxyphenylamino)-s-triazine, 2,4-Bis(n-octylthio)-6-(4′-hydroxy-3′,5′-di-tert-butylanilino)-1,3,5-triazine, 2,4-Bis(octylthio)-6-(3,5-di-tert-butyl-4-hydroxyanilino)-s-triazine, 2,4-Bis(octylthio)-6-(4-hydroxy-3,5-di-tert-butylanilino)-1,3,5-triazine, 2,4-Bis(octylthio)-6-(4-hydroxy-3,5-di-tert-butylanilino)-s-triazine, 2,4-Bis(octylthio)-6-(4′-hydroxy-3′,5′-di-tert-butylanilino)-1,3,5-triazine, 2,6-Di-tert-butyl-4-[4,6-bis(octylthio)-1,3,5-triazin-2-ylamino]phenol, 4-[[4,6-Bis(octylsulfanyl)-1,3,5-triazin-2-yl]amino]-2,6-di-tert-butylphenol, 4-[[4,6-Bis(octylthio)-1,3,5-triazin-2-yl]amino]-2,6-bis(1,1-dimethylethyl)phenol, 6-(3,5-di-tert-Butyl-4-hydroxyanilino)-2,4-bis(n-octylthio)-s-triazine, 6-(3,5-Di-tert-butyl-4-hydroxyanilino)-2,4-bis(octylthio)-s-triazine, 6-(4-Hydroxy-3,5-di-tert-butylanilino)-2,4-bis(n-octylthio)-1,3,5-triazine, 6-(4-Hydroxy-3,5-di-tert-butylanilino)-2,4-bis(octylthio)-1,3,5-triazine, 6-(4-Hydroxy-3,5-di-tert-butylanilino)-2,4-bis(octylthio)-s-triazine, Antioxidant 565, NSC 328455

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Identification & Functionality

Chemical Family
Plastics & Elastomers Functions
CAS No.
991-84-4
EC No.
213-590-1
Chemical name

2,6-Di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazin-2-ylamino) phenol

CAS number

991-84-4

Chemical Structure

Polygel PUREstab 565 Chemical Structure

Features & Benefits

Features & Benefits

PUREstab 565 is highly effective at low concentrations, matching the performance of other stabilizers at higher levels. It is non-staining and due to its low volatility, it is not lost during polymer processing, drying or storage. It can be used in a wide variety of applications. In unsaturated elastomers, PUREstab 565 prevents gel formation, maintains excellent polymer color, and prevents changes to molecular weight.

Applications & Uses

Applications

PUREstab 565 is a highly effective antioxidant for a variety of elastomers including polybutadiene (BR), polyisoprene (IR), emulsion styrene butadiene (SBR), nitrile rubber (NBR), carboxylated SBR Latex (XSBR), and styrenic block copolymers such as SBS and SIS. PUREstab 565 is also used in adhesives (hot melt, solvent-based), natural and synthetic tackifier resins, EPDM, ABS, high impact polystyrene, polyamides, and polyolefins.

The use levels of PUREstab 565 vary by polymer and range from 0.05% to 0.5%. The relatively low melting point allows easy dispersion in elastomeric substrates by commonly used melt com-pounding techniques or it can be incorporated into process streams by dissolving in suitable organic solvents or aromatic extender oils.

Properties

Color
Physical Form
Appearance
White powder or Granules
Soluble in
Water, Chloroform, Acetone, Methanol, Benzene, Ethyl Acetate, n-Hexane
Physical Properties
ValueUnitsTest Method / Conditions
Melting Range91 - 96°C
Flash Point285.0°C
Specific Gravity (at 20°C)1.09g/ml
Solubility
ValueUnitsTest Method / Conditions
Acetone (at 20°C)20.0g/100g
Chloroform (at 20°C)39.0g/100g
n-Hexane (at 20°C)6.0g/100g
Benzene (at 20°C)43.0g/100g
Methanol (at 20°C)1.4g/100g
Ethyl Acetate (at 20°C)46.0g/100g
Water (at 20°C)max. 0.01g/100g

Technical Details & Test Data

Molecular weight

589 g/mol

Safety & Health

Handling & Safety

PUREstab 565 exhibits a very low order of oral toxicity and does not present any abnormal problems in its handling or general use. For more information, please refer SDS.

Storage & Handling

Storage

This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.