Method of preparing polyalkylene acrylates

Details Method of preparing polyalkylene acrylates Method of preparing polyalkylene acrylates

C - Chemistry, Metallurgy

07

C

260/481.7, 260/4

C07C 69/54 (2006.01) C08G 65/332 (2006.01)

Patent

CA 1065338

Abstract of Disclosure Monomeric esters of polyalkylene glycols and .alpha.,.beta.-un- saturated carboxylic acids are prepared, using a polyalkylene glycol or mono-ether derivative of an alkylene glycol or poly- alkylene glycol which has a tendency to form peroxides, by heating a mixture of the glycol or derivative, a hydrocarbon solvent, and a small amount of a dilute caustic or sodium borohydride for a time and to a temperature sufficient to decompose the peroxide, and then reacting the glycol or derivative with an unsaturated acid such as acrylic acid or methacrylic acid in an inert atmosphere and in the presence of a suitable esterification catalyst and polymerization inhibitor. The crude reaction product is purified by extraction with an aqueous base, such as sodium carbonate, to remove acidic impurities and is thereafter treated with fuller's earth and decolorizing charcoal to remove any color bodies still present. The decolorizing agents are then removed by filtration.

223782

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