Novel vehicle gas mixtures and their use in medical preparations

摘要

A propellant gas mixt. (I) consists of two or more components which contain at least one lower partially fluorinated alkane and opt. one or more cpds. chosen from TG11, TG12, TG114, lower alkanes and DMF. The partially fluorinated lower alkane is pref. 1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, penta-fluoroethane, 1,1,1,2,3,3,3-heptafluoropropane (TG227) and the lower alkane is pref. propane, butane or pentane. (I) pref. also contains a surfactant which is pref. a phospholipid, a sorbitan ester with a higher opt. satd. fatty acid or a polyethoxy-sorbitan ester of a higher, pref. unsatd. fatty acid. The surfactant is esp. a lecithin, a polyoxyethylene sorbitanoleate or sorbitantrioleate.