Algoflon® PTFE Dispersions

Algoflon® D grades are colloidal aqueous dispersions of PTFE particles, stabilized with appropriate surfactants. Algoflon Dispersions may contain additional formulation ingredients for the control of specific properties like wetting, rheology, stability, etc.

Performance

Key features

  • Chemical inertness
  • Outstanding temperature resistance
  • Extremely low coefficient of friction
  • Exceptional release and water repellant properties
  • Outstanding heat resistance

Properties offered to the substrates

  • Chemical inertness
  • Excellent corrosion resistance
  • Exceptional heat resistance
  • Optimum dielectric and insulating properties
  • Extremely low coefficient of friction
  • Self-lubricating
  • Self-extinguishing
  • Outstanding anti-stick and release properties
  • Excellent weathering and ageing characteristics

Processing

The main processing techniques for Algoflon® D PTFE Dispersions are impregnation and coating. Impregnation is currently carried out onto glass fabrics and fibers, while coatings are mainly applied to metallic substrates.

Moreover, some Algoflon® D dispersions have been especially designed for particular applications including:

  • Additives for plastics (i.e. anti-dripping agent in flame retardant formulations)
  • Grades for co-coagulation with pigments and fillers (i.e. bearing applications)

Typical Properties

PropertyTest MethodUnitsAlgoflon® PTFE
Service temperature °C-260 to 260
Heat resistance  Stable up to 260°C
Weight loss per hour:
0.001% @ 350°C
0.01% @ 400°C
Chemical resistanceASTM D543 High inertness
Solvent resistanceASTM D543 Insoluble up to 300°C
Water absorptionASTM D570%0.0
Friction coefficientASTM D1894 Static: 0.08
Dynamic: 0.06
Thermal conductivityASTM C177W/m °C0.24
FlammabilityUL 94 V-0
Limiting oxygen indexASTM D2863%>95
Radiation resistance
to Gamma Ray
  Low:
Electrical properties unchanged
Mechanical properties decreased
Dialectric constant (ε)
@60 Hz up to 2 GHz
ASTM D150 2.1
Dissipation factor (tg ε)
@60 Hz up to 2 GHz
ASTM D150 <3*10-4
Volume resistivityASTM D257Ω cm1018

Applications

Architecture - Flexible Roofing Materials

The high weatherability and anti-stain properties of Algoflon® D PTFE Dispersions play a key role in this application.

These dispersions are used to impregnate glass or plastic fabrics for producing flexible structures for the roofing of wide areas, such as sport stadiums or tent structures.

Electrical, Electronics and Semiconductors

Algoflon® D PTFE Dispersions are used to impregnate glass fiber fabrics for the production of printed circuit boards. They are also utilized to produce thin and flexible films (e.g. via cast-film technology) with high dielectric strength, low dissipation factor and non-flammability for coils and phase insulation on motors, transformers, relays and switches.

Filtration

Algoflon® D PTFE Dispersions are currently utilized for the impregnation of fabrics (both woven and non-woven) and fibers for filtration, thanks to their exceptional general properties and in particular their chemical resistance and water repellency.

Food Processing

Algoflon® D PTFE Dispersions for impregnation are currently used in the manufacture of conveyors belts for the food industry, while Algoflon® D Dispersions for coatings are successfully utilized in formulations for cookware coatings.

Fuel Cell Gas Diffusion Layers

Algoflon® D PTFE Dispersion is the ideal hydrophobization agent for gas diffusion layers (GDL) of fuel cells. It shows:

  • Exceptional low surface energy, whereby the water-contact angle is very high, providing the desired low water wettability
  • Universal chemical inertness
  • Optimum thermal resistance (up to 260°C)

These outstanding characteristics assure long lasting and hydrophobic properties when applied onto GDL.