Pre-impregnated fibre-reinforced composite material and manufactured article obtained by forming and complete curing of said pre-impregnated fibre-reinforced composite material

Method for making a pre-impregnated fibre-reinforced composite material destined to be subjected to subsequent forming and complete curing operations to make a fibre-reinforced composite material, comprising the following operating steps:

• arranging a fibrous mass in laminar form;
• arranging a polymeric binder composition;
• impregnating said fibrous mass with said polymeric binder composition obtaining a pre-impregnated fibre-reinforced composite material
• wherein said polymeric binder composition is based on one or more resins selected from the group consisting of siloxane resins and silsesquioxane resins, and may optionally comprise one or more organic resins, said siloxane resins comprising polysiloxanes and said silsesquioxane resins comprising polysilsesquioxanes,
• wherein said polymeric binder composition further comprises at least one stabilizing agent selected from the group consisting of acetophenone, ethylbenzene, diethylbenzene, ethylstyrene, 2-tert-butylphenol, 2-6-di-tert-butylphenol, butylated hydroxytoluene, 2,4-dimethyl-6-tert-butylphenol, and
• wherein said polymeric binder composition appears as a liquid having viscosity of between 55000 and 10000 mPa·s at temperatures of between 50° C. and 70° C., wherein following the impregnation step the polymeric binder composition forms a polymeric binder matrix not crosslinked or only partially crosslinked which fills the interstices of the fibrous mass.