Process for synthesising semi-aromatic polyethers

Patent metadata

Field	Value
Publication number	US-12098244-B2
Application number	US-202017594169-A
Country	US
Kind code	B2
Filing date	Apr 3, 2020
Priority date	Apr 5, 2019
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

The invention relates to a process for producing semi-aromatic polyethers based on an aliphatic diol, to semi-aromatic polyethers based on an aliphatic diol obtained by said process, and to the use of said semi-aromatic polyethers based on an aliphatic diol for manufacturing membranes, manufactured parts and coatings.

First claim

The invention claimed is:

1. A semi-aromatic polyether based on an aliphatic diol of formula I:

wherein
Ar originates from a dihalogenated aromatic or heteroaromatic compound selected from dihalogenated aromatic sulfones, dihalogenated aromatic ketones, dihalogenated benzonitriles, dihalogenated diazenes, bis(halophenyl)oxadiazoles, dihalogenated nitrobenzenes, dihalogenated benzoylnaphthalenes and dihalogenated pyridines;
R originates from an aliphatic diol;
X is a chlorine;
n is an integer between 2 and 100, with n being determined by size-exclusion chromatography;
provided that R does not originate from isosorbide, cyclohexanedimethanol, tetramethylcyclobutanediol, or cis-1,5-cyclooctanediol when Ar originates from a 4,4′-halodiphenyl sulfone, and that R does not originate from isosorbide when Ar originates from a 4,4′-dihalobenzophenone;
wherein the semi-aromatic polyether based on an aliphatic diol contains residual silicon content of between 10 and 1,000 ppm, said residual silicon content being determined by combustion/ion chromatography coupling.

2. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein R originates from an aliphatic diol selected from linear aliphatic diols and branched aliphatic diols.

3. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein R originates from a 1,4:3,6-dianhydrohexitol.

4. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein its polydispersity index is between 1.5 and 5.

5. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein its number-average molecular weight is greater than or equal to 5,000 g/mol, said number-average molecular weight being measured by size-exclusion chromatography in dimethylformamide at 70° C. with a flow rate of 0.7 mL/min and with polystyrene calibration.

6. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein it has a glass transition temperature of greater than 100° C.

7. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein it contains a residual fluorine content of less than 100 ppm, said residual fluorine content being determined by combustion/ion chromatography coupling.

8. The semi-aromatic polyether based on an aliphatic diol according to claim 1 , wherein it contains a residual chlorine content of between 100 and 10,000 ppm, said residual chlorine content being determined by combustion/ion chromatography coupling.

Assignees

• Roquette Freres

Inventors

• Jacquel Nicolas
• DEGRAS Sarah
• MERCIER RéGIS

Classifications

• B01D71/522

  Aromatic polyethers · CPC title

• C08G2650/64

  Monomer containing functional groups not involved in polymerisation · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• C08G2650/26

  Sugars or saccharides used as initiators · CPC title

• C08G75/23

  Polyethersulfones · CPC title