Retention of Freon in poly(n-butyl α-cyanoacrylate) sprayed films

It has been found that when n‐butyl α‐cyanoacrylate is sprayed on a blood surface from an aerosol containing Freon as the propellant, the polymeric cyanoacrylate film which forms contains 1.4% propellant under the spray conditions used. Studies of the rate of loss of propellant from the film indicate that ⅓ of the Freon initially present in the film still remains after 90 min of exposure of the film to air. Possible implications of these results are discussed.