Home Our Business Fyroflex RDP-HP
Fyroflex RDP-HP

Fyroflex RDP-HP

Fyroflex RDP-HP

Fyrolflex® RDP-HP is a high purity oligomeric phosphate ester flame retardant with low triphenyl phosphate content.

In addition to low TPP content, Fyrolflex® RDP-HP also has very low phenol (typically below 50 ppm) and water content. This material is designed for use in engineered resin applications such as polyphenylene oxide alloys and PC/ABS. Because of its low volatility and high heat stability, this non-halogen flame retardant can tolerate high temperature processing required of many engineered resins. In addition to its FR characteristics, Fyrolflex® RDP-HP demonstrates improved processing characteristics in a number of thermoplastics including ABS and HIPS that benefits designs like thin wall moldings, and other high performance, high flow plastic applications.

Typically, RDP-HP is used at 8% to 15% to provide flame retardancy in a variety of resins. When used as a processing aid, 1% to 3% of RDP-HP is added to thermoplastics to improve melt flow characteristics with minimal loss of dimensional stability. Compared to other non-halogen FRs (phosphate esters), Fyrolflex® RDP-HP is relatively stable with low volatility, well within the processing parameters of most engineered plastics (onset decomposition >330° C).

Shipping: Available in bulk tank trucks, isocontainers, IBCs of 1270 Kg and drums of 268 Kg.

CAS Number


Key Benefits

  • A high purity product with triphenyl phosphate (TPP) level below 0.1%(%wt)
  • Has an advantage over other bis-phosphates due to low viscosity that allows for ease of handling, and better and safer management of resources (lower heat storage)
  • Contains higher phosphorus content than bis-phenol A bis phosphates, which leads to lower use levels


Phosphorus content wt. %
Specific Gravity @ 25°C
Viscosity @ 25°C mPa.s
Triphenyl phosphate (TPP) wt. %
Max. 0.10

Thermogravimetric Analysis (10° C/min N2):

Weight Loss, (%)

We would love to hear from you!

    We would love to hear from you!