Stabilizer for producing a polyester resin, process for preparing the same, process for producing the polyester resin using the same, and the polyester resin produced thereby

Patent metadata

Field	Value
Publication number	US-10550137-B2
Application number	US-201815907220-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Oct 5, 2017
Publication date	Feb 4, 2020
Grant date	Feb 4, 2020

Abstract

A stabilizer for producing a polyester resin comprises a phosphate ester composition which includes a phosphate ester compound having Formula (I),

wherein
X 1 represents

and
X 2 represents H or

wherein
R 1 and R 2 are independently selected from the group consisting of a linear C 2 -C 4 alkylene group, a branched C 3 -C 4 alkylene group, and a combination thereof.

First claim

What is claimed is:

1. A stabilizer for producing a polyester resin, comprising a phosphate ester composition which includes a phosphate ester compound having Formula (I),

wherein
X 1 represents

and
X 2 represents H or

wherein
R 1 and R 2 are independently selected from the group consisting of a linear C 2 -C 4 alkylene group, a branched C 3 -C 4 alkylene group, and a combination thereof.

2. The stabilizer according to claim 1 , wherein said phosphate ester composition includes the phosphate ester compound having Formula (I) wherein X 2 is H.

3. The stabilizer according to claim 2 , wherein said phosphate ester composition further includes the phosphate ester compound having Formula (I) wherein X 2 is

4. The stabilizer according to claim 3 , wherein the phosphate ester compound having Formula (I) wherein X 2 is H and the phosphate ester compound having Formula (I) wherein
X 2 is

are in an equivalent ratio ranging from 1:1 to 9:1.

5. A process for preparing the stabilizer according to claim 1 , comprising steps of:
a) dispersing phosphorus pentoxide in a solvent to obtain a phosphorus pentoxide dispersion; and
b) subjecting a compound having Formula (A) to a phosphorylation reaction with the phosphorus pentoxide at a temperature ranging from 40° C. to 100° C. by gradually adding the compound having Formula (A) into the phosphorus pentoxide dispersion,

wherein
R 1 and R 2 are independently selected from the group consisting of a linear C 2 -C 4 alkylene group, a branched C 3 -C 4 alkylene group, and a combination thereof.

6. The process according to claim 5 , wherein in step b), the phosphorus pentoxide and the compound having Formula (A) are in a molar ratio ranging from 1:1 to 1:2.

7. A process for producing a polyester resin, comprising a step of:
subjecting a dicarboxylic ester component to a polycondensation reaction in the presence of a catalyst and the stabilizer according to claim 1 .

8. The process according to claim 7 , wherein the stabilizer is used in an amount such that the polyester resin thus produced contains a practical phosphorus content in a range from 5 ppm to 150 ppm.

9. The process according to claim 7 , wherein the catalyst is a metal-containing catalyst.

10. A polyester resin produced by the process according to claim 7 .

Assignees

• Far Eastern New Century Corp

Inventors

• Hwang Der-Ren
• Cheng Hsin-Hui

Classifications

• C08G63/85

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

• C08G63/6926

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C07F9/091 Primary

  with hydroxyalkyl compounds with further substituents on alkyl · CPC title

• C08G63/82

  characterised by the catalyst used · CPC title

• C08K5/523

  with hydroxyaryl compounds · CPC title