US 12,286,922 B2
Thermal insulation structure and method of making same
Peter T. Dietz, Eagan, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/783,134
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Dec. 11, 2020, PCT No. PCT/IB2020/061843
§ 371(c)(1), (2) Date Jun. 7, 2022,
PCT Pub. No. WO2021/124057, PCT Pub. Date Jun. 24, 2021.
Claims priority of provisional application 62/949,173, filed on Dec. 17, 2019.
Prior Publication US 2023/0021664 A1, Jan. 26, 2023
Int. Cl. F01N 3/28 (2006.01)
CPC F01N 3/2871 (2013.01) [F01N 3/2864 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A thermal insulation structure comprising:
a first member comprising a first surface capable of being heated to a temperature of 200° C. or higher;
a second member comprising a second surface disposed opposite to the first surface of the first member;
a mat material disposed between the first member and the second member,
wherein an adhesive area formed on at least one of the first surface and the second surface comprises an inorganic adhesive,
wherein the mat material exhibits a coefficient of friction of 0.75 or higher at 600° C. at the surface in contact with one or both of the first member and second member,
wherein the inorganic adhesive exhibits adhesiveness upon being heated,
wherein the thermal insulation structure is a pollution control apparatus, with the first member being a pollution control element, the second member being a casing, the pollution control element being provided inside the casing, and the mat material disposed between the casing and the pollution control element;
wherein the inorganic adhesive comprises an alkali metal silicate chosen from sodium silicate, potassium silicate, and lithium silicate.