Patent GB-599237-A (GB)
Title: Improvements relating to the therapeutic application of medicaments and the utilisation of disinfectants, insecticides and insectifuges
IPC: A61L15/20
Filed: 1945-11-02
Abstract: A volatile medicament, disinfectant, insecticide, insectifuge or compound perfume is incorporated in a synthetic plastic by plasticising the synthetic plastic, wholly or in part by means of, or by means of a mixture containing, the volatile medicament &c. to form a mobile paste, casting and gelatinising the paste by heat to form a membrane or shaped body, and, to ensure that sufficient volatile medicament &c. remains in the gelatinized product after heating, effecting the heating in an atmosphere saturated with vapour at the vapour pressure exerted by the medicament &c.  This can be effected by confining the paste in closed boxes during the heating.  The preferred plastic is polyvinyl chloride which can be plasticised by butyl acetyl ricinoleate or dibutyl phthalate, but cellulose derivatives or synthetic rubbers may be employed.  A medicated membrane may be formed with woven textile material embedded therein and extending as tapes therefrom and may be shaped as a mask.  The medicated membrane may be backed by a non-medicated membrane. Perfumed membranes or bodies may be coloured with dyes or pigments and shaped as an artificial flower petal.  Specified medicaments are essential oils such as menthol, camphor and pine oil, methyl salicylate, sulphanilamide dissolved in glycerine and mixed with water, aspirin, coal tar and sulphur.  Specified insecticides, insectifuges and disinfectants are dichloro-diphenyl-trichlorethane, methyl phthalate and mono- and di-chlorxylenol.  Specifications 461,632 and 570,330 are referred to.ALSO:A volatile medicament, disinfectant, insecticide, insectifuge or compound perfume is incorporated in a synthetic plastic by plasticizing the synthetic plastic, wholly or in part by means of, or by means of a mixture containing, the volatile medicament &c. to form a mobile paste, casting and gelatinizing the paste by heat to form a membrane or shaped body and, to ensure that sufficient volatile medicament &c. remains in the gelatinized product after heating, effecting the heating in an atmosphere saturated with vapour at the vapour pressure exerted by the medicament &c.  This can be effected by confining the paste in closed boxes during the heating.  The preferred plastic is polyvinyl chloride which can be plasticised by butyl acetyl ricinoleate or dibutyl phthalate, but cellulose derivatives or synthetic rubbers may be employed.  The medicated membrane may be formed with woven textile material embedded therein and extending as tapes therefrom, and may be shaped as a mask.  The medicated membrane may be backed by a non-medicated membrane.  Perfumed membranes or bodies may be coloured and shaped as an artificial flower petal. Specified medicaments are essential oils such as menthol, camphor and pine oil, methyl salicylate, sulphanilamide dissolved in glycerine, aspirin, coal tar and sulphur.  Specified insecticides, insectifuges and disinfectants are dichloro - diphenyl - trichlor - ethane, methyl phthalate and mono- and dichlorxylenol.  Specifications 461,632 and 570,330, [both in Class IV], are referred to.