Patent ID: 11932745
Assignee: ASPEN AEROGELS, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 33:
34. A method of forming a polyimide gel, the method comprising:
a) providing a tetracarboxylic acid dianhydride and a multifunctional amine;
b) adding the tetracarboxylic acid dianhydride and the multifunctional amine to an organic solvent to form a solution;
c) allowing the tetracarboxylic acid dianhydride and the multifunctional amine to react in solution, forming a solution of a polyamic acid sol;
d) adding a dehydrating agent, a monoamine, and water to the solution of the polyamic acid sol, forming a gelation mixture and allowing the gelation mixture to gel to form the polyimide gel, wherein the water is added at a molar ratio of water to the tetracarboxylic acid dianhydride greater than about 5.