公开(公告)号：US11718716B2

公开(公告)日：2023-08-08

申请号：US17049168

申请日：2020-04-06

Applicant: TIEM FACTORY INC.

Inventor： Noboru Kawase ,  Mamoru Aizawa

IPC: C08G77/04 ,  B01J13/00 ,  C08J9/28

CPC classification number: C08G77/045 ,  B01J13/0091 ,  C08J9/283 ,  C08J2201/0502 ,  C08J2201/0546 ,  C08J2205/026 ,  C08J2383/04

Abstract: An aerogel and drying method, the aerogel having a larger size, good productivity, and high transparency. The aerogel has a silsesquioxane structure and exhibits two exothermic peaks observed in a temperature range of 300 to 600° C. as measured by TG-DTA (thermogravimetry-differential thermal analysis) under an inert gas atmosphere containing 80% by volume of an inert gas and 20% by volume of oxygen. A method for producing aerogel includes a drying step including a first step in which an aerogel which has undergone condensation of a hydrolysate is placed in a liquid phase system having a first liquid phase and a second liquid phase; a second step in which a first solvent constituting the first liquid phase is evaporated from the first liquid phase at a temperature greater than room temperature; and a third step in which heating is still continued after the first liquid phase is evaporated off.