RIGID POLYMETHACRYLIMIDE CELLULAR MATERIAL, ITS MANUFACTURE, AND LAMINATE, FLYING OBJECT, AND WIND TUNNEL AND ITS PARTS, CONTAINING SAID MATERIAL AS CORE

摘要

A novel polymethacrylimide rigid foam containing 0.1 to 10 % by weight of electrically conductive particles, in particular conductive carbon, which can be prepared by heating a methacrylic acid-methacrylonitrile copolymer containing propellants and conductive particles, is particularly suitable as the core material of laminates for aircraft construction and similar applications in rapidly flowing gases.