FIBROUS POLYMER PREPREG, METHODS FOR PREPARATION AND UTILIZATION THEREOF Russian patent published in 2000 - IPC

FIELD: medicinal polymers. SUBSTANCE: fibers, e.g. glass fibers, in the form of rove, woven mat, whiskers, or their mixture are treated with powder or solution of polymer, e.g. polymethylmethacrylate, and polymers of ethylene glycol dimethacrylate, 2,2-bis[4-(2-hydroxy-3- methacryloyloxy)phenyl] propane or hydroxyethylene methacrylate. Fiber can be preliminarily treated with silane compound, e.g. gamma- methacryloyloxypropyl(trimethoxy)silane, hardening at elevated temperature on glass fiber. Solvent for polymer can be added to fiber- polymer powder mixture or to polymer powder prior to be combined with fiber. After treatment of fiber, solvent is removed by evaporation. To resulting porous prepregs, plasticizer, e.g. monomer of polymer used in prepreg, is added and material is molded. Prepreg can contain polymerization initiator, e. g. benzoyl peroxide, and substance activating initiator, e.g. dimethyl-p-toluidine. Molded prepreg is imbedded into pure polymer of composite or into its mixture with monomer. Polymer surrounding prepreg in composite is advantageously polymer of prepreg. Polymers of prepreg and composite are formed simultaneously. Prepreg is supple at room temperature, retains its shape when in contact with pure polymer of composite, does not irritate mouth cavity and does not destroy therein. EFFECT: improved consumer's quality. 16 cl, 6 dwg, 1 tbl, 7 ex