Allyl glycidyl ether → 2,4,6,8-Tetramethyl-2,4,6,8-tetrakis(3-(oxiranylmethoxy)propyl)cyclotetrasiloxane

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Reaction Conditions

Reaction Steps

Allyl glycidyl ether (57.1 g, 0.5 moles) was added to a 250 mL 3-neck flask, equipped with a stirrer, dropping funnel, internal thermometer and condenser, and heated to 100° C. After the addition of 1 mL of a 1 weight percent solution of hexachloroplatinic acid in diethylene glycol dimethyl ether, 24.0 g (0.1 moles) of 2,4,6,8-tetramethylcyclotetrasiloxane were added very rapidly with vigorous stirring, the internal temperature rising to 195° C. After the addition of 2,4,6,8-tetramethylcyclotetrasiloxane, stirring was continued until the temperature of the reaction product had dropped to 130° C. Unreacted portions of the allyl glycidyl ether and 2,4,6,8-tetramethylcyclotetrasiloxane were removed by stirring the reaction mixture at 60°-70° C. at a vacuum of 0.1 hPa, produced by an oil pump. The slightly yellowish crude product (77.8%), nD20 : 1.4633, was subjected to a fractional vacuum distillation using a packed column. The compound (21) distilled at about 335° C. and 1 hPa as a clear, viscous liquid, the greater portion polymerizing. nD20 : 1,4668.

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