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US 2022/0177648 A1Published application
Process for synthesising semi-aromatic polyethers
AssigneeRoquette Freres
InventorsNicolas JACQUEL, Sarah DEGRAS, Régis MERCIER
Life of this patent
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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.
Claims20
1-19. (canceled)
A method for the preparation of semi-aromatic polyethers based on a 1,4:3,6-dianhydrohexitol comprising the following successive steps:
- a) preparation of a mixture comprising an aliphatic diol or a mixture of aliphatic diols, a dihalogenated aromatic or heteroaromatic compound, a hindered strong base in an organic solvent;
- and
- b) heating said mixture at a temperature between 30° C. and 120° C. for a period of less than or equal to 12 hours.
Dependencies are inferred from the claim text.