Showing papers on "Triphenyl phosphate published in 1975"
TL;DR: In this article, the phosphorus-bromine synergism was proposed with flame inhibition occurring mostly in the gas phase, and the melting temperature, reduced viscosity, and thermal stability above 400°C of these flame-retardant systems were in most cases comparable to those of poly(ethylene terephthalate) itself.
Abstract: Poly(ethylene terephthalate) containing hexabromobenzene, tricresyl phosphate, or a combination of triphenyl phosphate and hexabromobenzene, pentabromotoluene, or octabromobiphenyl was extruded or spun at 280°C into monofilaments or low-denier yarn, respectively. Only combinations of the phosphorus- and halogen-containing compounds resulted in flame-retardant poly(ethylene terephthalate) systems, without depreciating their degree of luster and color quality. The melting temperature, the reduced viscosity, and the thermal stability above 400°C of these flame-retardant systems were in most cases comparable to those of poly(ethylene terephthalate) itself. Phosphorus-bromine synergism was proposed with flame inhibition occurring mostly in the gas phase.
12 citations
TL;DR: In this paper, the thermal stability of a phenolic-phosphate resins, prepared by the transesterification of triphenyl phosphate and resorcinol and cured with hexamethylene tetraamine, has been compared with that of a conventional phenolic resin.
Abstract: The thermal stability of a phenolic-phosphate resin, prepared by the transesterification of triphenyl phosphate and resorcinol and cured with hexamethylene tetraamine, has been compared with that of a conventional phenolic resin. Thermogravimetric analysis (TGA) of the resins, in air, demonstrated that the phenolic-phosphate resin had the superior thermal resistance. Accordingly, to assess the performance of phenolic-phosphate resins as thermally stable binders in composites, long-term heating ageing studies at 250°C were carried out on asbestos-filled moulded test specimens. The results of these tests were less welldefined than the TGA results, for the phenolic composite had the higher flexural strength (108.5 MNm−2) initially compared with 56.7 MNm−2 for the phenolic-phosphate composite. However, after 1000 h heating at 250°C neither system retained a useful level of flexural strength, although the phenolic-phosphate composite (18.35 MNm−2) was stronger than the phenolic composite (5.4 MNm−2).
TL;DR: Eto et al. as mentioned in this paper found that quinol phosphates are susceptible to oxidation and inhibit the SH-enzyme alcohol dehydrogenase, which has been known as a malathion synergist.
Abstract: In a previous paper (Eto et al., 1975), we found the metabolic formation of a quinol phosphate in houseflies from triphenyl phosphate, which has been known as a malathion synergist (Plapp et al., 1963). It has been also reported that the fungicide edifenphos (S, S-diphenyl ethyl phosphorodithiolate ; HinosanQ) was partially metabolized through p-hydroxylation in Pyricularia oryzae (Uesugi and Tomizawa, 1971). Quinol phosphates are known to be activated oxidatively (Blackburn and Cohen, 1968). By oxidation, a quinol phosphate will give a quinone which may react with SH-compounds. This paper describes that quinol phosphates are susceptible to oxidation and inhibit the SH-enzyme alcohol dehydrogenase.