IP Library › Granted Patent US 12,202,967
Granted Patent B2
US 12,202,967 · App. 17/618,809 · Granted Jan 21, 2025

Polyester polymer nanocomposites

Inventor: William McCall (Brooklyn, NY)
Assignee: Kintra Fibers, Inc.
C08L67/02C08F251/02C08G63/16C08L1/02C08K2201/005
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Quick Facts
Patent No.
US 12,202,967
App. No.
17/618,809
Granted
Jan 21, 2025
Kind
B2
Abstract

Aspects of the present disclosure include compositions of and methods for producing a polymer-polysaccharide nanocomposite resin, including preparing a dispersion comprising polysaccharide nanocrystals, an alkane diol monomer and an alkane diacid agent monomer; polycondensing the alkane diol monomer and the alkane diacid agent monomer in the dispersion to produce a polymer-polysaccharide nanocomposite resin. Aspects of the present disclosure further include compositions of and methods for producing a polybutylene succinate nanocomposite, including dispersing cellulose nanocrystals in 1,4 butanediol (BDO) to form a cellulose-BDO dispersion and esterifying the cellulose-BDO dispersion and succinate anhydride to form a plurality of polybutylene succinate oligomers. The polybutylene succinate oligomers are condensed to form a polybutylene succinate nanocomposite.

Claims (21)

1. A method of preparing an NCC-in-1,4-butanediol dispersion, the method comprising: combining NCC and 1,4-butanediol with mixing; wherein the dispersion is characterized as a nematic mesophase.

2. The method of claim 1 , wherein the dispersion is characterized as a chiral nematic mesophase.

3. The method of claim 1 , wherein the dispersion is mixed by ultrasonication.

4. The method of claim 1 , wherein the dispersion is mixed by agitation.

5. The method of claim 4 wherein the dispersion is mixed by agitation in a homogenizer operating within the range of 10,000 rpm to 16,677 rpm.

6. The method of claim 1 , wherein the method further comprises heating and filtering the dispersion.

7. The method of claim 1 , wherein the dispersion is characterized by having particles with a size distribution from about 4 to 500 d·nm.

8. The method of claim 1 , wherein the dispersion is characterized by having particles with a size distribution from about 10 to 1000 d·nm.

9. The method of claim 1 , wherein the NCC is derived from heparin, chitosan, chitin, hyaluronan, starch, cellulose, alginate, pectin, guar, or chitin.

10. The method of claim 1 , wherein the NCC is derived from cellulose, starch, or chitin.

11. The method of claim 1 , wherein the NCC-to-diol monomer ratio is 1:10 (w/w).

12. The method of claim 1 , wherein the average width of the NCC is from about 1 to 100 nm.

13. The method of claim 1 , wherein the average length of the NCC is from about 25 to 3000 nm.

14. The method of claim 1 , wherein the average length-to-diameter NCC aspect ratio is between 10 and 200.

15. The method of claim 5 wherein the dispersion is mixed by agitation in a homogenizer operating within the range of 10,000 rpm to 13,300 rpm.

16. The method of claim 1 , wherein the NCC was produced by sulfuric acid hydrolysis, hydrochloric acid hydrolysis, hydrobromic acid hydrolysis, or phosphoric acid hydrolysis.

17. The method of claim 1 , wherein the NCC was produced by hydrochloric and/or hydrobromic acid hydrolysis, followed by TEMPO-oxidation.

18. The method of claim 16 , wherein the NCC comprises glucopyranose repeat units of the formula

or

19. The method of claim 18 , wherein the NCC comprises glucopyranose repeat units of the formula

20. The method of claim 17 , wherein the NCC comprises glucopyranose repeat units of the formula

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 20, 2022
From: MCCALL, WILLIAM
To: KINTRA FIBERS, INC.
Reel/Frame 062154/0178 →
Continuity (2)
Provisional Application 62863029 · Jun 18, 2019
Related Publication 20220235162A1 · Jul 28, 2022
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