US 12,290,709 B2
High temperature flexible insulation for extreme environments
Stephen D. Miller, Flagstaff, AZ (US)
Assigned to Sundance Management LLC, Sheridan, WY (US)
Appl. No. 17/916,794
Filed by MILLER SCIENTIFIC INC., Flagstaff, AZ (US)
PCT Filed Jan. 10, 2022, PCT No. PCT/US2022/011870
§ 371(c)(1), (2) Date Oct. 3, 2022,
PCT Pub. No. WO2022/150727, PCT Pub. Date Jul. 14, 2022.
Claims priority of provisional application 63/298,168, filed on Jan. 10, 2022.
Claims priority of provisional application 63/134,977, filed on Jan. 8, 2021.
Claims priority of provisional application 63/134,975, filed on Jan. 8, 2021.
Prior Publication US 2023/0294379 A1, Sep. 21, 2023
Int. Cl. B32B 5/26 (2006.01); A62C 3/02 (2006.01); B32B 5/02 (2006.01); B32B 5/12 (2006.01); D04H 1/413 (2012.01); D04H 1/4209 (2012.01); D04H 1/4242 (2012.01); D04H 1/4374 (2012.01); D04H 1/548 (2012.01); B64G 1/62 (2006.01)
CPC A62C 3/0257 (2013.01) [B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 5/028 (2013.01); B32B 5/12 (2013.01); B32B 5/266 (2021.05); B32B 5/277 (2021.05); D04H 1/413 (2013.01); D04H 1/4209 (2013.01); D04H 1/4242 (2013.01); D04H 1/4374 (2013.01); D04H 1/548 (2013.01); B32B 2250/20 (2013.01); B32B 2255/02 (2013.01); B32B 2255/20 (2013.01); B32B 2255/205 (2013.01); B32B 2262/02 (2013.01); B32B 2262/0246 (2013.01); B32B 2262/0253 (2013.01); B32B 2262/10 (2013.01); B32B 2262/101 (2013.01); B32B 2262/105 (2013.01); B32B 2262/106 (2013.01); B32B 2262/144 (2021.05); B32B 2262/16 (2021.05); B32B 2264/1022 (2020.08); B32B 2266/126 (2016.11); B32B 2307/304 (2013.01); B32B 2307/306 (2013.01); B32B 2307/3065 (2013.01); B32B 2307/546 (2013.01); B32B 2307/552 (2013.01); B32B 2307/738 (2013.01); B32B 2437/00 (2013.01); B32B 2439/70 (2013.01); B32B 2571/00 (2013.01); B32B 2605/18 (2013.01); B64G 1/62 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A high temperature flexible insulation comprising:
a) an outside layer of an insulation mat, comprising:
i) a structural component of a high temperature fibers selected from the group consisting of carbon, alumina, silica, mullite, a carbide, a nitride, a boride, and combinations thereof, said high temperature fibers having an average fiber diameter of no more than 25 μm, and a thermal degradation temperature in a non-oxygenated environment of at least 2000° C.;
ii) an extinction component selected from the group consisting of carbon, alumina, silica, mullite, a carbide, a nitride, a boride, titanium oxide and combinations thereof, having an average size of no more than 25 μm and a thermal degradation temperature in a non-oxygenated environment of at least 2000° C.; and
iii) a binder component of a nano-fibrous binder having a length to diameter ratio of at least 10 and an average diameter of no more than 1 μm;
b) an inside layer of an insulation mat, comprising:
i) a structural component of a high temperature fibers selected from the group consisting of carbon, alumina, silica, mullite, a carbide, a nitride, a boride, and combinations thereof, said high temperature fibers having an average fiber diameter of no more than 25 μm, and a thermal degradation temperature in a non-oxygenated environment of at least 2000° C.;
ii) an extinction component selected from the group consisting of carbon, alumina, silica, mullite, a carbide, a nitride, a boride, titanium oxide and combinations thereof, having an average size of no more than 25 μm and a thermal degradation temperature in a non-oxygenated environment of at least 2000° C.; and
iii) a binder component of a nano-fibrous binder having a length to diameter ratio of at least 10 and an average diameter of no more than 1 μm; and
iv) aerogel;
wherein the average diameter of the high temperature fibers of the inside layer is at least 20% greater than an average diameter of the high temperature fibers of the outside layer, thereby producing a gradient in fiber diameter from the inside layer to the outside layer;
wherein the high temperature flexible insulation has optical properties to produce a transmittance of no more than 5% over a range of temperature from 500° C. to 5000° C.; and
wherein said gradient of fiber diameters enables each of the inside layer and the outside layer to have an emittance and refractive index that corresponds to a gradient in temperature through the high temperature flexible insulation from the outside layer to the inside layer.