Silyl polyphosphates

Phosphorus pent oxide Acylations with acyl silyl polyphosphates under mild conditions... [Pg.334]

Polyphosphates are also an important class of organophosphorus polymers. In addition to their flame-retardant characteristics, they possess attractive plasticizing properties and can be used as polymeric additives to other polymers [123-128]. In general, polyphosphates can be prepared by interfacial [119,129], melt [130], or solution polycondensation [131,132a,b]. Kricheldorf and Koziel [133] prepared polyphosphates from silylated bisphenols. [Pg.46]

Trimethylsilyl esters of tris(thio)phosphonic acids 2070 are readily oxidized by DMSO in toluene at -30 °C to give the dimeric tetra(thia)diaphosphorinanes 2071 and HMDSO 7 [208] (cf. also the oxidation of silylated thiophenol via 2055 to diphenyl disulfide). The polymeric Se02 is depolymerized and activated by reaction with trimethylsilyl polyphosphate 195 to give the corresponding modified polymer... [Pg.297]

In this section, only the synthesis of polyphosphates (97) prepared by direct addition of phosphoric acid (95a) and its silyl derivative (95b) to diepoxides (96) is discussed. The number of carbon atoms between two closest phosphate groups was varied depending on the structure of starting diepoxide. "" ... [Pg.492]

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