METHOD OF PRODUCTION OF THE PREPREG Russian patent published in 2007 - IPC C08J5/24 B29B15/10 B29C43/44 C09K21/14 C09K21/02 

FIELD: chemical industry; aerospace industry; shipbuilding industry; other industries; methods of production of prepreg.

SUBSTANCE: the invention is pertaining to the method of production of the prepreg used at manufacture of the polymeric composite materials for aerospace, ship-building and other industries, requiring materials with the improved fire-fighting properties. The method includes impregnation of the fibrous roll long-sized material with the thermoreactive binding, excision of the excesses of the thermoreactive binding by gating of the impregnated fibrous roll long-sized material through the squeeze rollers with the subsequent drying. Before drying on the impregnated with the binding fibrous roll long-sized material they apply the layer of the powdery fire-retardant agent from 20 mass % up to 50 mass % of the gross weight of the thermoreactive binding and the powdery fire-retardant agent. Then the material additionally is gating through the stitch rollers with the adjustable force of the pressure. At that the force of the pressure is set such that after the stitching on the material there should stay the layer of the non-rolled powdery fire-retardant agent of no less than 10 mass % of the applied layer with the subsequent excision of the non-rolled powdery fire-retardant agent. As the powdery fire-retardant agent use the hydroxide of a metal. The invention allows to produce the prepreg with the high fire-fighting properties.

EFFECT: the invention ensures production of the prepreg with the high fire-fighting properties.

5 tbl, 3 ex