# US 2012/0083544 A1 · Reinforced microcellular urethane products > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2012/0083544 A1 - Document ID: US20120083544A1 - Status: Published application - Kind: A1 - Application number: 12/898,406 - Filed: 2010-10-05 - Published: 2012-04-05 - Earliest claimed: 2010-10-05 - Assignees: Freudenberg-NOK General Partnership - Inventors: Pratik Shah; Edward Hosung Park - Web page: https://patentgrep.com/patent/US20120083544A1 ## CPC - C08J 9/008: {Nanoparticles} - C04B 26/16: Polyurethanes - C08G 18/42: Polycondensates having carboxylic or carbonic ester groups in the main chain - C08G 18/724: {Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates} - C04B 2111/00008: {Obtaining or using nanotechnology related materials} - C08G 2110/0066: ≥ 150kg/m3 - C08J 2205/044: Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter - C08J 2375/04: Polyurethanes - C08K 3/36: Silica - C08K 2201/005: Additives being defined by their particle size in general - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) ## Abstract A microcellular urethane composition, comprising a polyol component, an isocyanate component having an isocyanate index ratio of from about 65 to about 145; and up to about 50% by weight of a nano-scale filler dispersed throughout the composition. Methods for producing a reinforced microcellular urethane component are also provided. ## Claims ### Claim 1 A reinforced microcellular urethane composition, comprising: a polyol component; an isocyanate component having an isocyanate index ratio of from about 65 to about 145; and up to about 50% by weight of a nano-scale filler dispersed throughout the composition. ### Claim 2 (depends on 1) The composition of claim 1, wherein the polyol component is present in an amount from about 50% to about 80% by weight of the reinforced microcellular urethane composition. ### Claim 3 (depends on 1) The composition of claim 1, wherein the polyol component comprises a blend of at least two polyols selected from the group consisting of polyester polyols, polyether polyols, polycaprolactone polyols, polycarbonate polyols, and polytetrahydrofuran polyols. ### Claim 4 (depends on 1) The composition of claim 1, wherein the polyol component comprises a blend including a polyether polyol and a polyester polyol. ### Claim 5 (depends on 4) The composition of claim 4, wherein the polyol blend comprises from about 10% to about 50% by weight of polyether polyol and from about 50% to about 90% by weight of polyester polyol. ### Claim 6 (depends on 1) The composition of claim 1, wherein the isocyanate component comprises a blend of at least two isocyanates selected from the group consisting of o-tolidine diisocyanate (TODI), diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), naphthalene diisocyanate (NDI), and p-phenylene diisocyante (PPDI). ### Claim 7 (depends on 1) The composition of claim 1, wherein the isocyanate component comprises an aromatic isocyanate. ### Claim 8 (depends on 1) The composition of claim 1, wherein the isocyanate component comprises diphenylmethane diisocyanate (MDI). ### Claim 9 (depends on 1) The composition of claim 1, wherein the nano-scale filler comprises an inert compound selected from the group consisting of nano-scale PTFE, nano-scale silica, carbon nanotubes, nano-scale graphite, and mixtures thereof. ### Claim 10 (depends on 1) The composition of claim 1, wherein the nano-scale filler comprises nano-scale silica present in an amount from about 0.01% to about 30% by weight of the reinforced microcellular urethane composition. ### Claim 11 (depends on 1) The composition of claim 1, wherein the nano-scale filler is present in an amount such that it does not change the nucleation rate. ### Claim 12 (depends on 1) The composition of claim 1, comprising an isocyanate index ratio from about 90 to about 110. ### Claim 13 (depends on 1) The composition of claim 1, comprising an isocyanate index ratio from about 100 to about 106. ### Claim 14 A method for producing a reinforced microcellular urethane component, the method comprising: dispersing a nano-scale filler with a polyol component to form a polyol mixture; metering the polyol mixture with an isocyanate component in an amount having an isocyanate index ratio of from about 65 and about 145; blending the resulting mixture; depositing the mixture into a tooling device and forming a reinforced microcellular urethane component. ### Claim 15 (depends on 14) The method according to claim 14, wherein the nano-scale filler is present in an amount sufficient to cause a change in an overall density and number of nucleating sites of the microcellular urethane component. ### Claim 16 (depends on 15) The method according to claim 15, wherein the dispersing of the nano-scale filler with the polyol component does not change the rate of nucleation. ### Claim 17 (depends on 14) The method of claim 14, wherein the polyol component comprises a blend of at least two polyol components. ### Claim 18 (depends on 17) The method of claim 17, wherein the polyol blend comprises a polyether polyol and a polyester polyol. ### Claim 19 (depends on 14) The method of claim 14, wherein the isocyanate component comprises a blend of at least two isocyanate components. ### Claim 20 (depends on 19) The method of claim 19, wherein the isocyanate blend comprises an aromatic isocyanate and an aliphatic isocyanate. ### Claim 21 (depends on 14) The method of claim 14, wherein the nano-scale filler is dispersed in an amount from 0.01% to about 30% by weight of the microcellular urethane component, and further wherein the nano-scale filler comprises an inert compound selected from the group consisting of nano-scale polytetrafluoroethylene (PTFE), nano-scale silica, carbon nanotubes, nano-scale graphite, and mixtures thereof. ### Claim 22 A method for producing a reinforced microcellular urethane component, the method comprising: dispersing a nano-scale filler with a polymer mixture, the polymer mixture comprising a polyol component including a blend of polyether polyol and polyester polyol, and an isocyanate component present in an amount having an isocyanate index ratio of from about 65 to about 145; blending the resulting mixture; depositing the mixture into a tooling device and forming a reinforced microcellular urethane component.