US 12,297,326 B2Granted

Copolymers, their preparation and use

AssigneeVictrex Manufacturing Limited

InventorsChantelle Duckworth, Don Thomas, Jack Atkin, Jason Bell, John Grasmeder, Nigel Slater, Oliver Carrdus, Samuel Lowe, Stuart Fenton, William Greene, Adam Chaplin

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Abstract

This invention relates to copolymers which consist essentially of [-ether-phenyl-ether-phenyl-carbonyl-phenyl-]and [ether-phenyl-phenyl-ether-phenyl-carbonyl-phenyl-] repeat units, as well as end units, which have reduced melting temperature (Tm) compared to prior art copolymers including such repeat units. The copolymers of the invention exhibit crystallinity and have similar glass transition temperatures to the prior art polymers.

Claims19

Dependent claims

A copolymer consisting essentially of repeat units of formula I:

—O-Ph-O-Ph-CO-Ph- I
and repeat units of formula II:
and end units,
wherein the molar ratio of repeat units of formula I to repeat units of formula II is from 55:45 to 95:5;
and
wherein the repeat units of formula I consist essentially of 50 to 90 molar % of repeat units of formula III:
and
10 to 50% by molar % of repeat units which are of formula IV, of formula V or of a mixture thereof;
wherein the repeat unit of formula IV is:
and the repeat unit of formula Vis:

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/005,531Filed 22 Jun 2021
Priority: GB 201090915 Jul 2020
Published: US 2023/0257505 A117 Aug 2023
Granted: 13 May 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

C08G 8/02
Condensation polymers of aldehydes or ketones with phenols only: of ketones
C08G 65/40
Derived from phenols: from phenols and other compounds , e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
B33Y 70/00
Materials specially adapted for additive manufacturing
C08G 65/4012
From phenols and other compounds , e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group: other compound containing a ketone group,…