Carlos E Navarro

US Patent:

20220363863, Nov 17, 2022

Filed:

Sep 18, 2020

Appl. No.:

17/761856

Inventors:

- Los Angeles CA, US
Steven NUTT - Los Angeles CA, US
Yijia MA - Los Angeles CA, US
Carlos NAVARRO - Los Angeles CA, US

Assignee:

UNIVERSITY OF SOUTHERN CALIFORNIA - Los Angeles CA

International Classification:

C08J 11/26
C08J 11/16
C08G 59/40
C08G 59/50
C08G 59/20

Abstract:

A method for recycling matrix residues includes steps of degrading a target epoxy to form matrix residues, collecting the matrix residues, and adding the matrix residues into a polymer-forming formulation. Characteristically, the polymer-forming formulation includes multifunctional anhydride monomers and polyfunctional co-reactant monomers.

US Patent:

20190203013, Jul 4, 2019

Filed:

Dec 27, 2018

Appl. No.:

16/234062

Inventors:

- Los Angeles CA, US
STEVEN NUTT - IRVINE CA, US
YIJIA MA - LOS ANGELES CA, US
CARLOS NAVARRO - LOS ANGELES CA, US

International Classification:

C08J 11/28
C01B 32/05
B01J 31/22
D01F 9/12

Abstract:

A method of aerobic depolymerization of fiber-reinforced polymer (FRP) composites using sustainable reagents and conditions. A cured matrix is digested into soluble monomers and oligomers by catalytic aerobic oxidation. Carbon fibers are removed for re-use, then the remaining material is treated and valuable monomers are isolated. The isolated monomers can be converted back into resin precursors for re-use. The method solves the problem created because the typically irreversible cure reaction impedes recycling and re-use of FRP composites.