Fibrous reinforcement for production of flame-retardant composite articles, is impregnated with mixture of thermosetting prepolymer or thermoplastic polymer and inorganic phosphorus compound

摘要

Novel fibrous reinforcement (A) comprises a fibrous support (I) impregnated or at least partially covered on one face with a composition containing: (a) thermosetting prepolymer(s)of softening point not more than 150 (preferably 50-100)[deg]C and/or thermoplastic polymer(s) having glass transition temperature less than 300 (preferably 50-200)[deg]C; and (b) inorganic phosphorus compound(s) (preferably red phosphorus), used at 2-20 (preferably 4-12, especially 6-10) wt. % based on (I). Independent claims are included for: (1) the preparation of (A); and (2) stacks of the reinforcement (A).