FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing reinforced thermoset polymer, comprising: (a) impregnation of reinforcing fibrous layer with a liquid thermoset polymer composition to produce prepreg, (b) curing thermoset polymer and (c) adding additional polymer component separately to prepreg before, during or after impregnation of reinforcing fibrous layer with thermosetting polymer composition so that, additional polymer component is combined with thermoset polymer during curing; wherein during impregnation thermoset polymer composition is not contained in said additional polymer component and where additional polymer component is porous and is added as a separate layer, a thin layer or coating, having thickness of 0.5 to 50 mcm and porosity, of 30 to 98 %.
EFFECT: invention also relates to a curable stack prepregs and a method of producing a prepreg.
18 cl, 3 dwg, 2 tbl
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