POLYURETHANE PREPREGS AND FIBER COMPOSITE ELEMENTS MADE THEREFROM Russian patent published in 2018 - IPC C08J5/24 C08G18/40 C08G18/48 C08G18/58 

FIELD: materials.

SUBSTANCE: invention relates to prepreg and a method for preparing storage-stable polyurethane prepregs, to flat fibrous composite parts, containing prepreg, to a method for manufacturing these parts and the use of prepregs and fibrous composite parts. Prepregs contain pre-impregnated with polyurethane flat fibrous layers. Polyurethane is used as a polyurethane as a matrix material for the impregnation of fibrous layers, obtained using an isocyanate component and polyols with a high content of secondary hydroxyl end groups. Details are obtained from fibrous composite materials (fibrous composite parts). Parts are made by impregnating fibrous materials, in particular fabrics and canvases, polyurethane. Prepregs and fibrous composite parts are used in the construction industry, Automobile industry, aviation and space industry, power engineering, shipbuilding, in highly loaded structures.

EFFECT: invention provides for the preparation of prepregs and composite parts on their basis in which the fibrous support is effectively wetted by using a matrix polyurethane material with a very low viscosity.

5 cl, 1 tbl, 4 ex