Toughened polyester composites containing polyester matrix and droplets of high boiling liquid therein

Patent metadata

Field	Value
Publication number	US-11518877-B2
Application number	US-202016775827-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	May 7, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A toughened polyester composite comprising: (i) a polyester matrix and (ii) droplets of a high boiling point liquid having a boiling point of at least 140° C. dispersed in said polyester matrix, wherein the high boiling point liquid is present in an amount of 0.1-10 wt % by weight of the toughened polyester composite, and wherein the composite may further include: (iii) a modifier selected from polycarboxylic, polyol, and polyamine compounds, wherein the modifier is present in an amount of 0.1-10 wt % by weight of the toughened polyester composite. Methods for producing the polyester composite are also described.

First claim

What is claimed is:

1. A toughened polyester composite comprising:
(i) a polyester matrix;
(ii) droplets of a high boiling point liquid having a boiling point of at least 140° C. dispersed in said polyester matrix, wherein said high boiling point liquid is present in an amount of 0.1-10 wt % by weight of the toughened polyester composite; and
(iii) a modifier selected from polycarboxylic, polyol, and polyamine compounds, wherein said modifier is present in an amount of 0.1-10 wt % by weight of the toughened polyester composite.

2. The polyester composite of claim 1 , wherein said modifier is a polycarboxylic acid.

3. The polyester composite of claim 2 , wherein said polycarboxylic acid is citric acid.

4. The polyester composite of claim 1 , wherein component (ii) is present in an amount of 0.1-2 wt %.

5. The polyester composite of claim 1 , wherein component (iii) is present in an amount of 0.1-2 wt %.

6. The polyester composite of claim 1 , wherein component (ii) is present in an amount of 0.5-2 wt %.

7. The polyester composite of claim 1 , wherein component (iii) is present in an amount of 0.5-2 wt %.

8. The polyester composite of claim 1 , wherein component (ii) is present in an amount of 0.1-1.5 wt %.

9. The polyester composite of claim 1 , wherein component (iii) is present in an amount of 0.1-1.5 wt %.

10. The polyester composite of claim 1 , wherein said polyester is a polyhydroxyalkanoate having the following structure:

wherein R 1 is selected from a hydrogen atom or hydrocarbon group, t is an integer from 0 to 4, n is an integer of at least 10, and said structure can be a homopolymer or copolymer.

11. The polyester composite of claim 10 , wherein said polyhydroxyalkanoate is selected from the group consisting of polylactic acid, polyglycolic acid, poly(3-hydroxypropionic acid), poly(hydroxybutyric acid)s, poly(hydroxyvaleric acid)s, poly(hydroxyhexanoic acid)s, polycaprolactone, polymandelic acid, and copolymers thereof.

12. The polyester composite of claim 10 , wherein said polyhydroxyalkanoate comprises polylactic acid.

13. The polyester composite of claim 1 , wherein said high boiling point liquid has a boiling point of at least 200° C.

14. The polyester composite of claim 1 , wherein said high boiling point liquid is a polysiloxane.

15. The polyester composite of claim 14 , wherein said polysiloxane is a polydimethylsiloxane or polymethylhydrosiloxane.

16. The polyester composite of claim 14 , wherein said polysiloxane is unfunctionalized.

17. The polyester composite of claim 14 , wherein said polysiloxane is functionalized with one or more functional groups selected from the group consisting of hydroxy, amine, carboxylic acid, thiol, diglycidyl ether, acrylamide, vinyl, and halogen groups.

18. The polyester composite of claim 17 , wherein said functional groups are located only at terminal positions of the polysiloxane.

19. The polyester composite of claim 14 , wherein said polysiloxane is terminal-functionalized with amine groups.

20. The polyester composite of claim 1 , wherein said high boiling point liquid is a high boiling plant-derived oil, animal-derived oil, or mineral oil.

21. The polyester composite of claim 1 , wherein said droplets have a size of 50 nm to 50 microns.

22. The polyester composite of claim 1 , wherein said droplets have a size of 50 nm to 5,000 nm.

23. The polyester composite of claim 22 , wherein said droplets have a size of 50 nm to 2,000 nm.

24. The polyester composite of claim 22 , wherein said droplets have a size of 50 nm to 1,000 nm.

Assignees

• Ut Battelle Llc
• Univ Tennessee Res Found

Inventors

• Ozcan Soydan
• Li Kai
• Wang Yu
• Tekinalp Halil L

Classifications

• C08G77/12

  containing silicon bound to hydrogen · CPC title

• C08L67/04 Primary

  Polyesters derived from hydroxycarboxylic acids, e.g. lactones (C08L67/06 takes precedence) · CPC title

• C08G63/88

  Post-polymerisation treatment · CPC title

• C08G77/26

  nitrogen-containing groups · CPC title

• C08G77/04

  Polysiloxanes · CPC title