SAYTEX® 621 flame retardant is a physical blend of brominated polystyrene and a polyester resin. It is supplied in a convenient low-dust pellet form and contains a high level of bromine, about 64 percent.

Functions: Flame Retardant, Smoke Suppressant

Chemical Family: Brominated Compounds, Polyesters, Styrenics

Processing Methods: Injection Molding

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Plastics & Elastomers Functions

Features & Benefits

Materials Features

Applications & Uses

Plastics & Elastomers Processing Methods

Properties

Appearance
Off-white
Typical Properties
ValueUnitsTest Method / Conditions
Bulk Density1180Kg/m³
Water Solubility (23°C)max. 0.1wt. %
Toluene Solubility (23°C)52wt. %
Molecular WeightProprietary (Polymeric)g/mol
TGA (10°C/min, under N2, 50% weight loss)412°C
Softening Point220°C
TGA (10°C/min, under N2, 5% weight loss)379°C
TGA (10°C/min, under N2, 10% weight loss)388°C
TGA (10°C/min, under N2, 1% weight loss)347°C
Styrene Monomer Solubility (23°C)49.4wt. %
Specific Gravity (23.5°C)2.1
Methanol Solubility (23°C)max. 0.1wt. %
Glass Transition Temperature (Tg)164°C
Bromine (Theoretical)approx. 64.6%
Acetone Solubility (23°C)max. 0.1wt. %

Regulatory & Compliance

Technical Details & Test Data

TGA Profile

SAYTEX® 621 - Tga Profile

Packaging & Availability

Regional Availability
  • Africa
  • Asia Pacific
  • Europe
  • Latin America
  • North America