RU97115816A - POLYMER-FIBERED BREAK, METHOD FOR ITS OBTAINING, AND ALSO APPLICATION OF THE SPECIFIED BREAK - Google Patents

Claims (16)

1. A method of obtaining a fibrous product pre-impregnated with a polymer (prepreg), wherein said prepreg is porous and is easily formed at room temperature after adding a plasticizer, which includes either i)
a) coating the fibers with a powder containing at least one polymer and optionally an agent having the ability to initiate a polymerization reaction of said polymer,
b) adding to the composition obtained in step a) a solvent having the ability to dissolve said polymer but not having the ability to initiate a polymerization reaction of said polymer, and
c) solvent evaporation,
either ii)
a) dissolving a powder containing at least one polymer and optionally an agent having the ability to initiate a polymerization reaction of said polymer in a solvent having the ability to dissolve said polymer but not having the ability to initiate polymerization of said polymer,
b) contacting the fibers with the solution obtained in the previous step, and
c) evaporation of the solvent.  2. The method according to claim 1, where the composition obtained in stage i) a) is loaded into the form before adding the solvent.  3. The method according to p. 1 or 2, where it includes surface treatment of the fibers in order to facilitate the binding of the polymer to the fibers, after which the fibers with the treated surface are coated with a polymer powder.  4. The method according to p. 1, 2 or 3, where the fiber is glass fiber.  5. The method according to PP. 1-4, where the polymer is polymethylmethacrylate (PMMA), ethylene glycol dimethacrylate (EHDMA), 2,2-bis [4- (2-hydroxy-3-methacroloxy) phenyl-propane (BISGMA) or hydroxyethylene methacrylate (HEMA), and an agent that facilitates binding of the polymer to glass fiber is a silane compound, preferably gamma-methacryoxypropyltrimethoxysilane, which cures on the fiber at elevated temperature.  6. A prepreg that is porous and easy to form at room temperature after the addition of a plasticizer, said prepreg consisting of fibers and a polymer, wherein said polymer is present between the individual fibers and distributed between the fibers in the form of a solution from which the solvent evaporates.  7. The prepreg according to claim 6, wherein the porous prepreg contains an agent having the ability to initiate a polymerization reaction of said polymer.  8. The prepreg according to claim 6 or 7, where the fibers are in the form of roving, woven rovings, woven mat, chopped glass yarn mat, short fibers, "mustache" or powder particles or as a mixture of the above.  9. Prepreg according to claims 6, 7 or 8, where the surface of the fibers is processed in order to facilitate the binding of the polymer.  10. Prepreg according to paragraphs. 6-9, where the fiber is glass fiber, the polymer is polymethyl methacrylate (PMMA), ethylene glycol dimethacrylate (EHDMA), 2,2-bis [4- (2-hydroxy-3-methacroloxy) phenyl propane (BISGMA) or hydroxy-ethylene methacrylate (HEMA) and the silane compound, preferably gamma-methacryloxypropyltrimethoxysilane, is applied to the surface of the fiber.  11. A method of obtaining a fiber-reinforced composite, where a prepreg is used according to claims 1-10 and said method includes the steps of: adding a plasticizer to said prepreg, which may optionally be preformed, molding the plasticized prepreg into the desired shape, embedding the prepreg in a pure polymer composite or a mixture of said polymer and monomer, and allowing the prepreg polymer to polymerise simultaneously with pure polymer composite.  12. The method of claim 11, wherein the composite obtained in the additional step is processed into one or more desired blocks or into a desired shape.  13. The method according to p. 11 or 12, where the plasticizer is a monomer of the polymer used in the prepreg.  14. The method according to PP. 11, 12 or 13, wherein the prepreg polymer is the same as the pure polymer of the composite.  15. Fiber-reinforced composite containing prepreg according to paragraphs. 1-10, wherein said prepreg is plasticized by wetting with a monomer, molded into the desired shape and embedded into a pure polymer of the composite, and the polymer of said pre-polymerisation is polymerized simultaneously with the pure polymer of the composite.  16. The composite according to claim 15, where it is used in medical or dental structures, such as prostodontic, orthodontic or orthopedic devices; removable denture bridges, removable denture fixators or corrective fixators; permanent or temporary fixed prostheses, including dentures and implant-supported prostheses; dental or medical implants; root canal fillings of an endodontically treated tooth; pins casts or fillings or crowns of a tooth; mouth guards and the like.