Fyrolflex® RDP

Fyrolflex RDP is a resorcinol bis(diphenyl phosphate). It is a liquid that is designed for use in engineering plastics such as polyesters, modified PPO as well as PC/ABS blends and HIPS. It has low volatility and good thermal stability, meaning it can outperform triaryl phosphates, such as triphenyl phosphate. Fyrolflex RDP is used either as a flame retardant or, in low doses, as a flow modifier. 

Trade Name Synonyms Fyrolflex RDP [Akzo Nobel http //www.akzonobei.com] 

Use of this plasticizer, which is commercially available (Fyrolflex RDP) permits to obtain, non-fogging, flame retarded polyurethane foam. Incorporation of halide (preferably chlorine) in trialkyl plasticizer results in an ignition resistant, UV stable plasticizer. Effect of a plasticizer on heat stability of PVC, flexibility of plasticized material at room and low temperatures is usually balanced by the selection of a required proportion between aryl and alkyl components. Low temperature properties can be improved by alkylphettylation with special attention to isopropyl substituents. Also haze can be eliminated in PVC composition by use of alkylated derivatives (e.g., methylphosphonate). Matty efforts were made by international groups of specialists to analyze reasons for increased toxicity of some phosphates such as tricresyl and triphenyl phosphates. Their extensive findings are reported elsewhere.  

Benzenedicarboxylic acid, bis [2-(1,1-dimethylethyl)-6-r[3-(1,1-dimethylethyl)-2-hydroxy-5-methylphenyll methyl]-4-methylphenyl] ester 67669-76-3 Dermol GL-7A Estalan-GLTR Glycereth-7 triacetate Hest G7A Pelemol G7A 67676-09-7 Isopulegyl acetate 57583-54-7 Fyrolflex RDP 

Oligomeric aromatic phosphates have been patented and commercially used as flame-retardant additives mainly for impact-resistant polystyrene blends with polyphenylene oxide and polycarbonate blends with acrylonitrile-butadiene-styrene (ABS) copolymers (130,131). They have also been shown useful in thermoplastic polyesters (92). The principal commercial examples are based on phenol and resorcinol (Akzo-Nobel s Fyrolflex RDP) or phenol and bisphenol A (Akzo-Nobel s Fyrolflex BDP or Albemarle s Ncendx P-30). Although these have the diphosphate as their principal ingredient, they also contain higher oligomers. 

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