HCID 21981744, compound → HCID 86741540, compound

Participants

Reaction Conditions

Reaction Steps

In a one liter, 3-neck flask fitted with a mechanical stirrer, thermometer, condenser, gas inlet tube, addition funnel and electric heating mantle was placed 164 g (0.34 mole) "Desmondur" N-100 biuret triisocyanate, and 109 g ethyl acetate and 4 drops stannous octoate. The mixture was heated to 82° C. and stirred under a slow N2 stream while slowly adding over a period of 3 hours a solution of 319 g (0.55 mole) N-ethyl(perfluorooctane)sulfonamidoethyl alcohol in 212 g ethyl acetate and containing 3 drops of stannous octoate. Heating (82° C.) and stirring was continued for a period of 3 hours to yield mainly a fluorochemical biuret urethane isocyanate intermediate, (C8F17SO2N(C2H5)C2H4OCONHCO--2NC6H12NCO or more simply (Rf --Q--A--2B--A--NCO, and smaller amounts of B--A--Q--Rf)3 and (OCN--A--2B--A--Q--Rf with B, A, Q and Rf as defined above.

Provenance & Evidence