Patent ID: 6939493

Claim:
A method for the production of porous composite materials comprising a) preparing a preimpregnated product, b) heat treating the preimpregnated product at a temperature of between 70 deg. C. and 1100 deg. C, c) embedding the heat treated preimpregnated product with a defined quantity of an inert substance that comprises a charge, a porophore and a binder based on a polymeric material, d) heating the embedded heat treated preimpregnated product to a temperature of between 160 deg. C and 200 deg. C. with concurrent application of a pressure of between 1 and 5 MPa with temporisation, where the quantity of the inert substance exceeds the volume of the voids f the single-layer yarn and is calculated by means of the formula (1] m n = d n · ( a · b · h - m pr d fib ) [ 1 ] where m n is the mass of the inert substance; d n is the density of the inert substance; a is the length of the preimpregnated product; b is the width of the preimpregnated product; h is the thickness of the preimpregnated product; m pr is the mass of the preimpregnated product; and d fib is the density of the fibre.