Flame Retardants Center >> Organic Phosphorus Compounds Center

Why use Organic Phosphorus FR's?

One of the major classes of flame retardants for thermoplastics and polyurethane foams is that of organic phosphorus compounds (typically phosphates and phosphonates). These may also include phosphorus-halogen compounds and blends of phosphorous with halogenated flame retardants (typically brominated FR's).

Thermoplastic alloys such as PC/ABS and PPO/HIPS are often required to meet stringent FR standards such as UL94 V0. Phosphate based FR's work efficiently in these resins and give good physical properties and good UV stability

Please click on the desired icon for specific information regarding flame retardants for PU foam and thermoplastics as well as its applications:

>>Benefits <<
Benefits in
Rigid PUR Foams
Benefits in
Flexible PUR Foams
Benefits in
PC/ABS blends
PPO/HIPS blends
>> Applications <<
Home Furnishings and Upholstery
Transportation seats
Wall Sheathing

In many applications, rigid and flexible polyurethane foams are required to exhibit a degree of flammability resistance in order to pass specific flammability tests in any given country. Phosphorus based flame retardants, both chlorinated (chlorophosphates) and non-halogenated are extensively used in these applications and are considered an ideal choice, giving a good balance of process ability, flame retardancy and physical properties. In some instances Phosphorous bromine blends are used particularly where low scorch is required.

Depending on the final application, its key requirements and the flammability standards they must meet, PUR foam producers have the flexibility to choose among reactive additive, halogenated and non-halogenated phosphorus based flame retardants. These options provide a versatile selection for addressing the market needs of:

  • Performance
  • Compatibility
  • Efficiency
  • Physical properties
  • Process ability
  • Cost


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