Self-Repairing, Reinforced Matrix Materials

• US 20080058445A1
• Filed: 10/31/2007
• Published: 03/06/2008
• Est. Priority Date: 06/19/1990
• Status: Abandoned Application

• Current Assignee: Carolyn Dry
• Original Assignee: Carolyn Dry
• Inventors: Dry, Carolyn
• Application Number:
  US11/932,882
• Publication Number:
  US 20080058445A1
• Time in Patent Office: Days
• US Class Current: 523/206
• CPC Class Codes: A61L 27/48 with macromolecular fillers
• CPC Class Codes: B28B 17/00 Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping moulds B28B7/00; after-treatment B28B11/00; feeding or discharging B28B13/00; arrangements for embedding elements in the material B28B23/00
• CPC Class Codes: B29C 73/163 Sealing compositions or agents, e.g. combined with propellant agents
• CPC Class Codes: B29C 73/22 the article containing elements including a sealing composition, e.g. powder being liberated when the article is damaged
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 17/04 bonded with or embedded in a plastic substance
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10963 specially adapted for repairing the layered products
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2307/54 Yield strength; Tensile strength
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2307/762 Self-repairing, self-healing
• CPC Class Codes: B32B 2603/00 Vanes, blades, propellers, rotors with blades
• CPC Class Codes: B32B 2605/18 Aircraft
• CPC Class Codes: B32B 5/02 characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C04B 20/0048 Fibrous materials
• CPC Class Codes: C04B 20/0056 : Hollow or porous fibres
• CPC Class Codes: C04B 20/1025 : Fats; Fatty oils; Ester type waxes; Higher fatty acids; Derivatives thereof
• CPC Class Codes: C04B 2103/00 : Function or property of ingredients for mortars, concrete or artificial stone
• CPC Class Codes: C04B 2103/0046 : added as monomers or as oligomers
• CPC Class Codes: C04B 2103/0067 : the ingredients being formed in situ by chemical reactions or conversion of one or more of the compounds of the composition
• CPC Class Codes: C04B 2111/72 : Repairing or restoring existing buildings or building materials
• CPC Class Codes: C04B 22/006 : released by a chemical reaction, e.g. polymer condensation
• CPC Class Codes: C04B 22/085 : containing nitrogen in the anion, e.g. nitrites
• CPC Class Codes: C04B 2235/3217 : Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
• CPC Class Codes: C04B 2235/524 : Non-oxidic, e.g. borides, carbides, silicides or nitrides
• CPC Class Codes: C04B 2235/5284 : Hollow fibers, e.g. nanotubes
• CPC Class Codes: C04B 2235/80 : Phases present in the sintered or melt-cast ceramic products other than the main phase
• CPC Class Codes: C04B 24/08 : Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
• CPC Class Codes: C04B 24/282 : Polyurethanes; Polyisocyanates
• CPC Class Codes: C04B 24/32 : Polyethers, e.g. alkylphenol polyglycolether
• CPC Class Codes: C04B 24/42 : Organo-silicon compounds
• CPC Class Codes: C04B 26/02 : Macromolecular compounds
• CPC Class Codes: C04B 26/14 : Polyepoxides
• CPC Class Codes: C04B 28/02 : containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 28/34 : containing cold phosphate binders
• CPC Class Codes: C04B 35/52 : based on carbon, e.g. graphite
• CPC Class Codes: C04B 35/80 : Fibres, filaments, whiskers, platelets, or the like
• CPC Class Codes: C04B 38/0003 : containing continuous channels, e.g. of the "dead-end" type or obtained by pushing bars in the green ceramic product B28B takes precedence
• CPC Class Codes: C04B 40/0028 : Aspects relating to the mixing step of the mortar preparation
• CPC Class Codes: C04B 40/0092 : Temporary binders, mortars or concrete, i.e. materials intended to be destroyed or removed after hardening, e.g. by acid dissolution
• CPC Class Codes: C04B 40/0263 : Hardening promoted by a rise in temperature C04B40/024 takes precedence
• CPC Class Codes: C04B 40/06 : Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
• CPC Class Codes: C04B 40/0633 : Chemical separation of ingredients, e.g. slowly soluble activator
• CPC Class Codes: C04B 40/0641 : Mechanical separation of ingredients, e.g. accelerator in breakable microcapsules
• CPC Class Codes: C04B 40/0675 : Mortars activated by rain, percolating or sucked-up water; Self-healing mortars or concrete
• CPC Class Codes: C08J 3/241 : Preventing premature crosslinking by physical separation of components, e.g. encapsulation
• CPC Class Codes: C08K 7/00 : Use of ingredients characterised by shape
• CPC Class Codes: C08K 7/02 : Fibres or whiskers
• CPC Class Codes: C22C 47/00 : Making alloys containing metallic or non-metallic fibres or filaments
• CPC Class Codes: C22C 47/04 : by coating, e.g. with a protective or activated covering
• CPC Class Codes: C22C 49/00 : Alloys containing metallic or non-metallic fibres or filaments
• CPC Class Codes: C22C 49/14 : characterised by the fibres or filaments
• CPC Class Codes: Y10T 428/249971 : Preformed hollow element-containing
• CPC Class Codes: Y10T 428/249994 : Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]
• CPC Class Codes: Y10T 428/249995 : Constituent is in liquid form
• CPC Class Codes: Y10T 428/249997 : Encapsulated liquid

Abstract

Self-repairing, fiber reinforced matrix materials include a matrix material including inorganic as well as organic matrices. Disposed within the matrix are hollow fibers having a selectively releasable modifying agent contained therein. The hollow fibers may be inorganic or organic and of any desired length, wall thickness or cross-sectional configuration. The modifying agent is selected from materials capable of beneficially modifying the matrix fiber composite after curing. The modifying agents are selectively released into the surrounding matrix in use in response to a predetermined stimulus be it internal or externally applied. The hollow fibers may be closed off or even coated to provide a way to keep the modifying agent in the fibers until the appropriate time for selective release occurs. Self-repair, smart fiber matrix composite materials capable of repairing microcracks, releasing corrosion inhibitors or permeability modifiers are described as preferred embodiments in concrete and polymer based shaped articles.

Claims

1. A self repairing composition comprising a combination of a polymer matrix, having a plurality of chains attached to a backbone, and modifying chemical within repair vessels.

2. The composition of claim 1 wherein the polymer matrix is at least one of polyolefin, polyester, polyamide, polyaramid, polyimide, carbon, graphite, cellulose, nitrocellulose, polysiloxane, epoxy, hydrocarbon, polytetrafluoroethylene, polyurethane, aramid, polypropylene, and elastomer, one- and two-part adhesives, one- and two-part epoxy adhesives, cyanoacrylate adhesives, Elmer'"'"'s glue, amines, polysiloxanes, asphalt, thermoplastic polymers, thermosetting polymers, thermoplastic elastomers, crosslinkable polymers, curable polymer resin systems, polyacrylates, polyarylates, polyurethanes, foaming polyurethanes, crosslinkable polymers, curable resin systems, phenolformaldehyde resins, thermoplastic elastomers, styrene, butadiene, rubber, neoprene, SEBS, NBR, and EPDM rubbers.

3. The composition of claim 2 wherein the polymer matrix is a polyamide.

4. The composition of claim 1 wherein the vessels are hollow.

5. The composition of claim 4 wherein the vessels comprise fiberglass, cement, asphalt, hydroxyapatite, glass, ceramic, metal, polyolefin, polyester, polycarbonate, polyacrylate, polyarylate, polyamide, polyimide, polyaramide, polyurethane, carbon, graphite, cellulose, nitrocellulose, hydrocarbon, shape memory alloys, or magnetostrictive piezoelectric material.

6. The composition of claim 1 wherein the modifying chemical comprises at least one of polyolefin, polyester, polyamide, polyaramid, polyimide, carbon, graphite, cellulose, nitrocellulose, polysiloxane, epoxy, hydrocarbon, polytetrafluoroethylene, polyurethane, aramid, polypropylene, and elastomer, one- and two-part adhesives, one- and two-part epoxy adhesives, cyanoacrylate adhesives, Elmer'"'"'s glue, amines, polysiloxanes, one- and two-part adhesives, one- and two-part epoxy adhesives, cyanoacrylate adhesives, sealant, siloxane, silica additives, calcium nitrate, polyprolylene glycol, amines and other crosslinkers, epoxy precursers, polymerizable monomers such as methyl methacrylates, styrene, acids, bases, solvents, cement, fly ash, bottom ash, phosphoric acid, ceramic, silicon oxide, titanium oxide, silicon nitride, metals, aluminum, steel, metal alloys, asphalt, thermoplastic polymers, thermosetting polymers, thermoplastic elastomers, crosslinkable polymers, curable polymer resin systems, hydroxyapatite, thermoplastic polymers, polyolefins, polyesters, polycarbonates, polyacrylates, polyarylates, polyamides, polyimides, polyaramides, polyurethanes, foaming polyurethanes, crosslinkable polymers, curable resin systems, phenolformaldehyde resins, rubbery polymers, butadiene, rubber, neoprene, SEBS, NBR, and EPDM rubbers, viscoelastic materials, latexes, sinterable ceramics, hydroxyapatites, silicas, titanium, carbides, oxides, alumina, iron, lead, copper, bronze, phosphor bronze, brass bronze, and calcium salts.

7. The composition of claim 6 wherein the modifying chemical is crosslinked.

8. The composition of claim 7 wherein the modifying chemical is a polyolefin.

9. The composition of claim 8 wherein the modifying chemical reacts with the matrix.

10. The composition of claim 9 modifying the matrix is a polyamide.

11. The composition of claim 1 wherein the self repair to be done is joining of crack damage.

12. The composition of claim 11 wherein the crack damage is within the polymer matrix.

13. The composition of claim 12 wherein the crack damage in the polymer reveals crack faces.

14. The composition of claim 13 wherein the crack faces are joined by the repair chemical.

15. The composition of claim 14 wherein the crack faces are joined in aero-nautical structures, automotive parts, sporting equipment, construction material, space age packages, encapsulants, die attach, plastic packaging, structural composites, glass panels, windows, marine devices, adhesives, paints, sealants, coatings impregnating resins, finishes, or coatings.

16. The composition of claim 12 wherein the matrix is a polyamide.

17. The composition of claim 16 wherein the modifying chemic is a polyolefin.

18. The composition of claim 1 having an end use as an article of manufacture selected from the group consisting of aero-nautical structures, automotive parts, sporting equipment, construction material, space age electronic packages, encapsulants, die attachments, plastic packaging, structural composites, glass panels, windows, marine devices, adhesives, paints, sealants, coatings, impregnating resins, finishes, and coatings.

19. A self repairing composition consisting of a combination of a polymer matrix, having a plurality of chains attached to a backbone, and modifying chemical within repair vessels.

20. A self repairing composition comprising a combination of a polymer matrix, having a plurality of chains attached to a backbone, and crosslinked modifying chemical within repair vessels.

21. The composition of claim 20 wherein the modifying chemicals are polyolefins.

22. A self repairing composition comprising a combination of a polyamide polymer matrix, having a plurality of chains attached to a backbone, and crosslinked modifying chemical within repair vessels, the modifying chemical configured to repair the polyamide.

23. The composition of claim 22 wherein the modifying chemical comprises a polymer precursor and a crosslinker.

24. The composition of claim 23 wherein the modifying chemical is epoxy precursor and the crosslinker is an amine.