Composite material
AssigneeCognis IP Management GmbH
InventorsPaul Birnbrich, Hans-Josef Thomas, Dagmar Stahlhut-Behn
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Abstract
The invention relates to composite materials, containing (i) a nanoporous polymer foam, which can be obtained by reacting one or more epoxy resins with one or more amphiphilic epoxy resin hardeners in water in a phase inversion polymerization process, and (ii) one or more inorganic fillers and/or inorganic fibers, with the stipulation that hollow glass balls are excluded as fillers. Said composite materials are suitable as heat-insulating materials.
Claims10
A composite material comprising (i) a nanoporous polymer foam obtained by reacting one or more epoxy resins with one or more amphiphilic epoxy resin hardeners in water in a phase inversion polymerization, and (ii) one or more inorganic fillers selected from the group consisting of a mineral foam, clay mineral, glass granules (perlite), carbon nanotubes, silicic acid, silica and zeolite, and combinations thereof, and/or inorganic fibers selected from the group consisting of glass fibers, sepiolite, wollastonite, and combinations thereof, with the proviso that hollow glass beads are excluded as fillers;
- wherein the one or more amphiphilic epoxy resin hardeners are obtained by reacting a mixture comprising:
- (A) at least one epoxidized polyalkylene oxide selected from the group consisting of epoxidized polyethylene oxides, epoxidized polypropylene oxides, and epoxidized polyethylene-propylene oxides,
- (B) at least one epoxidized aromatic hydroxyl compound selected from the group consisting of bisphenol A epoxides and bisphenol F epoxides and
- (C) at least one aromatic hydroxyl compound selected from the group consisting of bisphenol A and bisphenol F
- to form an intermediate and subsequently reacting this intermediate with a polyamine (P)
- wherein the composite material is effective to provide thermal insulating properties.
Dependencies are inferred from the claim text.