Diol composition and polyester

Patent metadata

Field	Value
Publication number	US-10696785-B2
Application number	US-201214000897-A
Country	US
Kind code	B2
Filing date	Feb 21, 2012
Priority date	Feb 22, 2011
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A diol composition includes a diol as a major component and has an electrical conductivity of 0.6 to 30 mS/m.

First claim

The invention claimed is:

1. A diol composition comprising:
1) 95% by weight or more of a diol selected from the group consisting of ethylene glycol, 1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, and 2,3-butanediol, and
2) one or more components selected from the group consisting of oxalic acid, acetic acid, lactic acid, formic acid, pyruvic acid, propionic acid, malonic acid, succinic acid, citric acid, glycolic acid, malic acid, n-butyric acid, isobutyric acid, hydroxy butyric acid, α-ketoglutaric acid, maleic acid, tartaric acid, glyoxylic acid, citraconic acid, pyroglutaric acid, and ascorbic acid in an amount sufficient to cause the diol composition to have an electrical conductivity of 0.6 to 30 mS/m as determined by measuring electrical conductivity as an aqueous diol composition solution at 23° C. with a diol composition concentration of 16.67% and multiplying the measured conductivity by 6.

2. The diol composition according to claim 1 , having a pH of 5 to 7.5.

3. The diol composition according to claim 1 , comprising a biomass resource-derived diol.

4. The diol composition according to claim 2 , comprising a biomass resource-derived diol.

5. A polyester made from the diol composition according to claim 2 and a dicarboxylic acid.

6. A polyester made from the diol composition according to claim 3 and a dicarboxylic acid.

7. A method of producing polyester comprising:
producing polyester using the dial composition according to claim 1 and a dicarboxylic acid as materials.

8. A method of producing polyester comprising:
producing polyester using the diol composition according to claim 1 and a dicarboxylic acid as materials; and
producing a molded article by molding said polyester.

9. A diol composition comprising:
1) 95% by weight or more of a dial selected from the group consisting of ethylene glycol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, and 2,3-butanediol, and
2) one or more components selected from the group consisting of oxalic acid, acetic acid, lactic acid, formic acid, pyruvic acid, propionic acid, malonic acid, succinic acid, citric acid, glycolic acid, malic acid, n-butyric acid, isobutyric acid, hydroxy butyric acid, α-ketoglutaric acid, maleic acid, tartaric acid, glyoxylic acid, citraconic acid, pyroglutaric acid, and ascorbic acid in an amount sufficient to cause the diol composition to have an electrical conductivity of 0.6 to 30 mS/m as determined by measuring electrical conductivity as an aqueous diol composition solution at 23° C. with a diol composition concentration of 16.67% and multiplying the measured conductivity by 6.

10. A polyester made from the diol composition according to claim 1 and a dicarboxylic acid.

11. A molded article produced by molding the polyester according to claim 10 .

Assignees

• Ito Masateru
• Morita Izumi
• Kawamura Kenji
• Yamada Tetsuya
• Kumazawa Sadanori
• Yamada Katsushige
• Toray Industries

Inventors

• Ito Masateru
• Morita Izumi
• Kawamura Kenji
• Yamada Tetsuya
• Kumazawa Sadanori
• Yamada Katsushige

Classifications

• C07C31/20

  Dihydroxylic alcohols · CPC title

• C08G63/16 Primary

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C08L67/02

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

• C08J5/00

  Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00) · CPC title