Plasticizer and resin composition, and preparation method thereof

Patent metadata

Field	Value
Publication number	US-9714211-B2
Application number	US-201414412894-A
Country	US
Kind code	B2
Filing date	Oct 22, 2014
Priority date	Feb 7, 2014
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

Provided are a plasticizer and a resin composition including the plasticizer, and a method of preparing the same. The plasticizer may improve physical properties, such as light resistance required for a compound formulation or viscosity, bleeding phenomenon, and gelling property required for a sheet formulation, when used as a plasticizer of a resin composition, by improving poor physical properties that have been ascribed to structural limitations although having environmental friendliness.

First claim

The invention claimed is:

1. A plasticizer comprising isophthalate and terephthalate,
wherein a weight ratio of the isophthalate to the terephthalate is in a range of 50:50 to 99:1.

2. The plasticizer of claim 1 , wherein the isophthalate has an end group independently selected from alkyl groups having 1 to 12 carbon atoms.

3. The plasticizer of claim 2 , wherein the isophthalate has an end group independently selected from alkyl groups having 8 to 10 carbon atoms.

4. The plasticizer of claim 2 , wherein the isophthalate is dialkylisophthalate.

5. The plasticizer of claim 4 , wherein the isophthalate has a structure represented by Chemical Formula 1:

6. The plasticizer of claim 1 , wherein the terephthalate has an end group independently selected from alkyl groups having 1 to 12 carbon atoms.

7. The plasticizer of claim 6 , wherein the terephthalate has an end group independently selected from alkyl groups having 8 to 10 carbon atoms.

8. The plasticizer of claim 6 , wherein the terephthalate is dialkylterephthalate.

9. The plasticizer of claim 8 , wherein the terephthalate has a structure represented by Chemical Formula 2:

10. The plasticizer of claim 1 , wherein the plasticizer is an ether-free plasticizer.

11. A method of preparing the plasticizer of claim 1 , the method comprising steps of:
adding both isophthalic acid and terephthalic acid to alcohol to obtain a mixture, wherein the isophthalic acid and the terephthalic acid are mixed in a weight ratio of 50:50 to 99:1;
adding a catalyst to the mixture to react in a nitrogen atmosphere;
removing unreacted alcohol and neutralizing unreacted acid; and
dehydrating and filtering by vacuum distillation to obtain the plasticizer.

12. The method of claim 11 , wherein the alcohol has an alkyl group having 1 to 12 carbon atoms.

13. The method of claim 11 , wherein the alcohol is used in an amount of 150 mol % to 500 mol % based on 100 mol % of the isophthalic acid.

14. A method of preparing the plasticizer of claim 1 , the method comprising:
preparing an ester-based mixture including terephthalate and isophthalate; and
obtaining the plasticizer by blending the terephthalate and the isophthalate to include the isophthalate in an amount of 50 wt % to 99 wt % based on a total weight of the ester-based mixture.

15. A resin composition comprising the plasticizer of claim 1 in an amount of 5 parts by weight to 150 parts by weight based on 100 parts by weight of a resin selected from the group consisting of ethylene vinyl acetate, polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, and a thermoplastic elastomer.

16. The resin composition of claim 15 , wherein the composition is used in a compound formulation or a sheet formulation.

17. The resin composition of claim 15 , wherein the composition is used in manufacturing electric wires, flooring materials, automotive interior materials, films, sheets, wallpaper, or tubes.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Hyun Kyu
• Jung Da Won
• Lee Mi Yeon
• Ko Dong Hyun

Classifications

• C07C67/08

  by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds · CPC title

• C07C69/82

  Terephthalic acid esters · CPC title

• C07C67/03

  by reacting an ester group with a hydroxy group · CPC title

• C08K5/0016

  Plasticisers · CPC title

• C07C69/80 Primary

  Phthalic acid esters · CPC title