Abstract: A method for separating specific hydrocarbons from a hydrocarbon mixture of hydrocarbons using a membrane made of a fluorine-containing polyimide resin having high separation ability with regard to certain hydrocarbons, and a high resistance to hydrocarbon is disclosed. The method is of high practicability with regard to performance and cost. Certain hydrocarbons permeate selectively and are separated by bringing a hydrocarbon mixture into contact with a membrane having a fluorine-containing polyimide resin as its main component, whose main component is the minimum repeating unit expressed by The mixture is passed through the membrane, thereby selectively permeating, for example, unsaturated hydrocarbons. The main component of the membrane is a fluorine-containing polyimide resin with a fractional free volume in the range of 0.130-0.175.

Abstract: A medical pressure-sensitive adhesive and a medical bandage formed using the same are disclosed. The medical pressure-sensitive adhesive comprises an acrylic polymer and a specific liquid or pasty component which is in a liquid state or pasty state at room temparature and is compatible with the acrylic polymer. The medical pressure-sensitive adhesive is suitable for use as a plaster, a pressure-sensitive dressing, a poultice and the like.