Thermoplastic and/or elastomeric composite based on carbon nanotubes and graphenes

1. Composite of carbon nanotubes and of graphenes comprising:

a) carbon nanotubes, the content of which represents from 10% to 50% by weight relative to the total weight of the composite;

b) graphenes, the content of which represents from 0.1% to 10% by weight relative to the total weight of the composite; and

c) a polymer composition comprising at least one thermoplastic polymer and/or one elastomer;

wherein the composite is in agglomerated solid form.

2. Composite according to claim 1 , wherein the carbon nanotubes are multiwalled, the multiwalled carbon nanotubes comprising from 5 to 15 sheets.

3. Composite according to claim 1 , wherein the polymer composition comprises a thermoplastic polymer selected from the group consisting of: olefin homopolymers and copolymers; acrylic homopolymers and copolymers and polyalkyl (meth)acrylates; homopolyamides and copolyamides; polycarbonates; polyesters polyethers; polystyrene; styrene/maleic anhydride copolymers; polyvinyl chloride; fluoropolymers; natural or synthetic rubbers; thermoplastic polyurethanes; polyaryletherketones (PAEK); polyetherimide; polysulphone; polyphenylene sulphide; cellulose acetate; polyvinyl acetate; and blends thereof.

4. Composite according to claim 3 , wherein the polymer composition further comprises a plasticizer selected from the group consisting of:

phosphate alkyl esters and alkyl esters of hydrobenzoic acid, lauric acid, azelaic acid or pelargonic acid;

arylphosphates;

phthalates;

nitrile resins;

cyclized polybutylene terephthalate and mixtures containing such;

adipates;

sebacates;

glycol benzoates or glycerol benzoates;

dibenzyl ethers,

chloroparaffins;

functionalized amphiphilic hydrocarbons;

propylene carbonate;

sulphonamides;

salts of N-alkyl guanidine

propylene glycol or other glycols; and

mixtures thereof.

5. Composite according to claim 1 , wherein the polymer composition comprises a thermoplastic polymer which is a homopolyamide or copolyamide and optionally a plasticizer selected from the group consisting of sulphonamides, hydroxybenzoates, phthalates, adipates and phosphates.

6. Composite according to claim 1 , wherein the polymer composition comprises a thermoplastic polymer which is a polycarbonate and optionally a plasticizer selected from the group consisting of phosphate alkyl esters, aryl phosphates and phthalates.

7. Composite according to claim 1 , wherein the polymer composition comprises a thermoplastic polymer which is a styrene-butadiene-methyl methacrylate copolymer and optionally a plasticizer selected from the group consisting of phthalates and nitrile resins.

8. Composite according to claim 1 , wherein the polymer composition comprises an elastomer selected from the group consisting of: fluorocarbon or fluorosilicone polymers; nitrile resins; butadiene homopolymers and copolymers, optionally functionalized with unsaturated monomers; neoprene; polychloroprene; polyisoprene; copolymers of isoprene at least one of with styrene, butadiene, acrylonitrile and methyl methacrylate; copolymers comprising at least one of propylene and ethylene; halogenated butyl rubbers; silicone resins; polyurethanes; polyesters; acrylic polymers; and modified or functionalized derivatives thereof and mixtures thereof.

9. Composite according to claim 8 , wherein the elastomer is selected from the group consisting of: nitrile resins; silicone resins; fluorocarbon polymers; and mixtures thereof.

10. The composite according to claim 1 , wherein said carbon nanotubes represents from 10% to 40% by weight relative to the total weight of the composite.

11. The composite according to claim 1 , wherein said graphenes represents from 1% to 10% by weight relative to the total weight of the composite.

12. The composite according to claim 10 , wherein said graphenes represents from 1% to 10% by weight relative to the total weight of the composite.

13. The composite according to claim 1 , wherein the agglomerated solid form comprises substantially cylindrical, spherical, ovoid, rectangular, prismatic, granule, pellet or pebble forms, or mixtures thereof.

14. The composite according to claim 1 , wherein the polymer composition represents at least about 60% by weight relative to the total weight of the composite.