Method for preparing a polyester resin

Patent metadata

Field	Value
Publication number	US-9328195-B2
Application number	US-200913142837-A
Country	US
Kind code	B2
Filing date	Dec 23, 2009
Priority date	Dec 31, 2008
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

Disclosed is a method for preparing a polyester resin, wherein phosphate additives are used in preparing polyester resin to improve the reactive property of the esterification reaction or transesterification, as well as the flame retardancy property and the color stability of a polyester resin. The method for preparing a polyester resin comprises the steps of: carrying out an esterification reaction and/or an ester exchange reaction of a diacid component and a diol component in a presence of phosphoric acid derivatives, wherein the diol component comprises a primary diol and isosorbide, and wherein a reaction time of the esterification reaction or the ester exchange reaction is reduced and the remaining rate of isosorbide in the main chain of the polyester resin is increased.

First claim

The invention claimed is:

1. A method for preparing a polyester resin comprising the steps of:
carrying out an esterification reaction and/or an ester exchange reaction of a diacid component and a diol component in a presence of phosphoric acid derivatives selected from a group consisting of compounds represented by the following Formulas 1 to 3; and
carrying out a polycondensation reaction for reaction product of the esterification and/or ester exchange reaction,

in Formula 1, R 1 is a linear, branched, mono-cyclic or multi-cyclic saturated or unsaturated hydrocarbon group of 0 to 10 carbon atoms, in Formula 2, R 2 is a hydrogen atom or a linear saturated or unsaturated hydrocarbon group of 1 to 10 carbon atoms, R 3 and R 4 are independently a linear, branched, mono-cyclic or multi-cyclic saturated or unsaturated hydrocarbon group of 1 to 10 carbon atoms, in Formula 3, R 5 is a linear, branched, mono-cyclic or multi-cyclic saturated or unsaturated hydrocarbon group of 1 to 10 carbon atoms, and R 6 is a saturated or unsaturated hydrocarbon group of 1 to 10 carbon atoms,
wherein the diol component comprises a primary diol and isosorbide, the input of the primary diol is 1 to 200 parts by mole, the input of isosorbide is 10 to 70 parts by mole with respect to 100 parts by mole of the diacid component, and
wherein a reaction time of the esterification reaction or the ester exchange reaction is reduced and the remaining rate of isosorbide in the main chain of the polyester resin is increased to be from 48 mole percent to 70 mole percent in comparison to polymer prepared without the phosphoric acid derivatives, and wherein the input of the phosphoric acid derivatives is 0.01 to 2 parts by weight with respect to 100 parts by weight of the diacid component.

2. The method for preparing polyester resin according to claim 1 , wherein the input of the phosphoric acid derivatives is 0.01 to 0.5 parts by weight with respect to 100 parts by weight of the diacid component.

3. The method for preparing polyester resin according to claim 1 , wherein the input of the phosphoric acid derivatives is 0.05 to 0.5 parts by weight with respect to 100 parts by weight of the diacid component.

Assignees

• Park Kyu-Tae
• Lee Yoo-Jin
• Kim Jong-Ryang
• Hwang Sin-Young
• Sk Chemicals Co Ltd

Inventors

• Park Kyu-Tae
• Lee Yoo-Jin
• Kim Jong-Ryang
• Hwang Sin-Young

Classifications

• C08G63/199

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title

• C08G63/6924 Primary

  derived from polycarboxylic acids and polyhydroxy compounds · CPC title

• C08G63/78 Primary

  Preparation processes · CPC title

• C08G63/82

  characterised by the catalyst used · CPC title

• C08G63/692

  containing phosphorus · CPC title