Rhodia Consumer Specialties Limited

Rhodia UK Limited

Julie Ann Salter

Vincent Schanen

Christopher Harris

Dwight Shamblee

Alan Craig Smith

Gleb Priimov

Christopher John Harris

Mixtures of three types of linear, branched or cyclic phosphates are useful flame retardants, especially for thermoplastic resins or as functional additives in polymer matrices.

Mixed phosphonate flame-retardants

A method for making &#x3b2;-ketophosphonates by reacting a trialkyl phosphonocarboxylate (such as triethyl phosphonoacetate) with an acyl halide (such as acetyl chloride) in a reaction involving ester formation, followed by decarboxylation, followed by purification. The reaction is run in a single solvent, which is not removed from the reaction mixture until the purification stage. Suitable solvents for this purpose include halogenated aromatic hydrocarbons (such as mono-chlorobenzene).

&#x3b2;-ketophosphonates

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Dudley, United Kingdom

Julie Ann Salter