Composite materials with improved performance
View Patent ↗A composite material comprising at least one polymeric resin and optionally at least one fibrous reinforcement, where the polymeric resin comprises; at least one difunctional epoxy resin; and at least one epoxy resin with a functionality greater than two having at least one meta-substituted phenyl ring in its backbone.
1. A composite material comprising at least one polymeric resin composition which is curable at a curing temperature and at least one fibrous reinforcement, wherein the polymeric resin composition comprises:
between about 22 weight percent and 25 weight percent, based on the overall resin composition, of bisphenol-F-diglycidyl ether;
between about 25 weight percent and 30 weight percent, based on the overall resin composition, of triglycidyl-m-aminophenol;
between about 10 weight percent and 15 weight percent, based on the overall resin composition, of insoluble thermoplastic particles consisting essentially of equal weight amounts of particles consisting essentially of polyamide 6 and particles consisting essentially of a copolymer of polyamide 6 and polyamide 12;
between about 13 weight percent and 17 weight percent, based on the overall resin composition, of polyethersulfone; and
a sufficient amount of a curing agent consisting essentially of an aromatic diamine hardener, to cure said polymeric resin composition at said curing temperature.
2. The composite material according to claim 1 , wherein the fibrous reinforcement is selected from hybrid and mixed fibre systems which comprise synthetic fibers, natural fibres, or combinations thereof.
3. The composite material according to claim 2 , wherein the fibrous reinforcement comprises at least one of fiberglass, carbon fibres, and aromatic polyamide fibres.
4. The composite material according to claim 1 , wherein the curing agent consists essentially of 4,4′-diaminodiphenyl sulphone and/or 3,3′-diaminodiphenyl sulphone.
5. The composite material according to claim 4 wherein said curing agent is present in an amount of between about 15 weight percent and 17 weight percent, based on the overall resin composition.
6. The composite material according to claim 4 wherein said curing agent consists essentially of 4,4′-diaminodiphenyl sulphone.
7. The composite material according to claim 1 , wherein the composite material further comprises at least one additional ingredient selected from flexibilisers, accelerators, thermoplastic polymers and core shell rubbers, flame retardants, wetting agents, pigments/dyes, UV absorbers, anti-fungal compounds, fillers, and conducting particles.
8. The composite material according to claim 7 wherein said conducting particles are selected from: silver, gold, copper, aluminum, nickel, conducting grades of carbon, buckminsterfullerene, carbon nanotubes, carbon nanofibers, nickel coated carbon particles, and silver coated copper particles.
9. A polymeric resin composition which is curable at a curing temperature, wherein the polymeric resin composition comprises:
between about 22 weight percent and 25 weight percent, based on the overall resin composition, of bisphenol-F-diglycidyl ether;
between about 25 weight percent and 30 weight percent, based on the overall resin composition, of triglycidyl-m-aminophenol;
between about 10 weight percent and 15 weight percent, based on the overall resin composition, of insoluble thermoplastic particles consisting essentially of equal weight amounts of particles consisting essentially of polyamide 6 and particles consisting essentially of a copolymer of polyamide 6 and polyamide 12;
between about 13 weight percent and 17 weight percent, based on the overall resin composition, of polyethersulfone; and
a sufficient amount of a curing agent consisting essentially of an aromatic diamine hardener, to cure said polymeric resin composition at said curing temperature.
10. The polymeric resin composition according to claim 9 wherein said curing agent is present in an amount of between about 15 weight percent and 17, based on the overall resin composition.
11. The polymeric resin composition according to claim 9 wherein said curing agent consists essentially of 4,4′-diaminodiphenyl sulphone.
12. A method of making a composite material comprising the steps of:
providing the polymeric resin composition according to claim 9 and at least one fibrous reinforcement; and
applying the polymeric resin composition to the fibrous reinforcement.
13. A method of making a cured composite material comprising the steps of:
providing the polymeric resin composition according to claim 9 and at least one fibrous reinforcement;
combining the polymeric resin composition and the fibrous reinforcement to form a composite material; and
curing the composite material.
14. A method of making an aerospace article comprising the steps of:
making a cured composite material in accordance with the method of claim 13 ; and
manufacturing an aerospace article with the cured composite material.