US 11,952,459 B2
Polyester polymer nanocomposites
William McCall, Brooklyn, NY (US)
Assigned to Kintra Fibers, Inc., Brooklyn, NY (US)
Filed by Kintra Fibers, Inc., Brooklyn, NY (US)
Filed on Jun. 23, 2023, as Appl. No. 18/213,685.
Application 18/213,685 is a continuation of application No. PCT/US2021/065081, filed on Dec. 23, 2021.
Claims priority of provisional application 63/130,020, filed on Dec. 23, 2020.
Prior Publication US 2023/0357499 A1, Nov. 9, 2023
Int. Cl. C08G 63/78 (2006.01); C08B 15/00 (2006.01); C08G 63/668 (2006.01); C08L 67/00 (2006.01); D01F 1/10 (2006.01); D01F 6/84 (2006.01)
CPC C08G 63/78 (2013.01) [C08B 15/00 (2013.01); C08G 63/668 (2013.01); C08L 67/00 (2013.01); D01F 1/10 (2013.01); D01F 6/84 (2013.01); D10B 2401/063 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for producing a polymer-polysaccharide nanocomposite resin, the method comprising the steps of:
a) preparing and heating a mixture comprising a diacid agent monomer and a diol monomer at a first temperature to esterify the diacid and diol monomers;
b) contacting the heated mixture of step a) with a nanocellulose crystal (NCC) dispersion after esterification of the monomers to produce a NCC oligomeric composition; and
c) heating a second mixture comprising the NCC oligomeric composition and a catalyst at a second temperature and under reduced pressure of 500 mTorr or less to polycondense the NCC oligomeric composition and produce a polymer-cellulose nanocomposite resin.