Albright & Wilson Limited

Rhodia Consumer Specialties Limited

Alan Craig Smith

Keith Philip Davis

David Robert Walker

Mohsen Zakikhani

Gary Woodward

Christopher Harris

Julie Ann Salter

Peter David Hasling

Christopher John Harris

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

The reaction of compounds of the formula:

Phosphino derivatives

Phosphonic acid polymers are prepared from di- or polyphosphonic acids having one or more unsaturated C.dbd.C bonds (e.g. vinylidene-1,1-diphosphonic acid), either as homopolymers or as higher polymers with at least one further compound having unsaturated C.dbd.C bonds (e.g. acrylic acid). The polymers can be used as, or in connection with, flame-retardants, corrosion inhibitors, coatings, cements and ion exchange resins.

Phosphonic acid polymers

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Bedworth, United Kingdom

Alan Craig Smith