Polyester and molded article

Patent metadata

Field	Value
Publication number	US-11760834-B2
Application number	US-202217956885-A
Country	US
Kind code	B2
Filing date	Sep 30, 2022
Priority date	Sep 30, 2021
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

Disclosed is a polyester and molded article. The polyester includes residues of formula (i), formula (ii), and formula (iii):

in which R 1 is an arylene group; R 2 is a C 2 -C 6 straight-chain hydrocarbylene group; and * represents a linking bond. The polyester has a number average molecular weight not less than 15,000 and has a degree of dispersion ranged from 2.95 to 5.70.

First claim

What is claimed is:

1. A polyester, comprising residues of formula (i), (ii), and formula (iii):

wherein R 1 is an arylene group;
R 2 is a C 2 -C 6 straight-chain hydrocarbylene group; and
* represents a linking bond,
wherein the polyester has a number average molecular weight not less than 15,000 and has a degree of dispersion ranged from 2.95 to 5.70.

2. The polyester of claim 1 , wherein R 1 is

or a combination thereof.

3. The polyester of claim 1 , wherein R 2 is a C 2 -C 4 straight-chain hydrocarbylene group.

4. The polyester of claim 3 , wherein R 2 is a C 2 straight-chain hydrocarbylene group.

5. The polyester of claim 1 , wherein the number average molecular weight is 15,000 to 25,000.

6. The polyester of claim 5 , wherein the number average molecular weight is 16,000 to 23,000.

7. The polyester of claim 1 , wherein the degree of dispersion is 3.00 to 4.50.

8. The polyester of claim 7 , wherein the degree of dispersion is 3.10 to 4.50.

9. The polyester of claim 8 , wherein the degree of dispersion is 3.13 to 4.50.

10. The polyester of claim 1 , wherein the residue of formula (iii) is 10 mol % to 90 mol % of a sum of the residue of formula (ii) and the residue of formula (iii).

11. The polyester of claim 10 , wherein the residue of formula (iii) is 20 mol % to 80 mol % of a sum of the residue of formula (ii) and the residue of formula (iii).

12. A molded article, comprising the polyester of claim 1 .

13. The molded article of claim 12 , wherein R 1 is

or a combination thereof.

14. The molded article of claim 12 , wherein R 2 is a C 2 -C 4 straight-chain hydrocarbylene group.

15. The molded article of claim 14 , wherein R 2 is a C 2 straight-chain hydrocarbylene group.

16. The molded article of claim 12 , wherein the number average molecular weight is 15,000 to 25,000.

17. The molded article of claim 16 , wherein the number average molecular weight is 16,000 to 23,000.

18. The molded article of claim 12 , wherein the degree of dispersion is 3.00 to 4.50.

19. The molded article of claim 12 , wherein the residue of formula (iii) is 10 mol % to 90 mol % of a sum of the residue of formula (ii) and the residue of formula (iii).

20. The molded article of claim 19 , wherein the residue of formula (iii) is 20 mol % to 80 mol % of a sum of the residue of formula (ii) and the residue of formula (iii).

Assignees

• Chang Chun Plastics Co Ltd

Inventors

• Huang Ching-Jui
• Wang Ping-Chieh

Classifications

• C08G63/183 Primary

  Terephthalic acids · CPC title

• C08G63/181 Primary

  Acids containing aromatic rings · CPC title

• C08G63/199 Primary

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title

• C08G63/85

  Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof {(C08G63/823 takes precedence)} · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title