Vision aid, useful as prism glasses e.g. sunglasses and goggles, comprises spectacle lens, frame, and at least two materials that comprise metal and plastic and are connected to each other by coating of adhesion promoter composition

摘要

Vision aid comprises at least one spectacle lens, a frame, and at least two materials A and B comprising metal, plastic, glass and wood. The materials A and B are connected to each other by a coating of an adhesion promoter composition, which includes at least one hot melt adhesive based on copolyamide. An independent claim is included for a process for preparing the vision aid or a vision aid-frame, comprising at least partially coating the adhesion promoter composition on a surface of the material A and then subsequently connecting the material A to the material B.