Slurry composition, prepreg tape, and process for producing composites

A pliable nonflammable tape comprising a fiber reinforcement material and a matrix material, the matrix material comprising:

• a powder comprising precursor particles;
• one or more binders;
• one or more liquid plasticizers;
• and
• one or more solvents;
• wherein the tape contains less than ten weight percent of the one or more solvents yet is pliable as a result of containing a sufficient amount of the one or more liquid plasticizers.

A process of using a slurry composition to produce a pliable nonflammable tape, the process comprising:

• forming the slurry composition to contain a powder comprising particles of at least one precursor, at least one binder, at least one liquid plasticizer, and a solvent in which the binder is dissolved;
• impregnating a fiber reinforcement material with the slurry composition to produce a slurry-impregnated reinforcement material;
• and
• evaporating at least a portion of the solvent from the slurry-impregnated reinforcement material to form the tape in which the particles of the precursor are adhered together by a matrix material formed by the binder;
• wherein a sufficient amount of the solvent evaporates to result in the tape being nonflammable and containing less than ten weight percent of the solvent, yet the tape is also pliable as a result of containing a sufficient amount of the liquid plasticizer.