Victrex Manufacturing Limited

Richard Luke Ainsworth

Adam Chaplin

Brian Wilson

Carlo Capra

Alice Victoria Mary Matthews

Carlie Ann Beardsall

Geoff Small

Kathryn Warmington

Graham Webster

A polymeric material has a repeat unit of formula &#x2014;O-Ph-O-Ph-CO-Ph- I and a repeat unit of formula &#x2014;O-Ph-Ph-O-Ph-CO-Ph- II wherein Ph represents a phenylene moiety; wherein the repeat units I and II are in the relative molar properties I:II of from 65:35 to 95:5; wherein log(X %)&#x3e;1.50-0.26 MV; wherein X % refers to the % crystallinity measured as described in Example 31 and MV refers to the melt viscosity measured as described in Example 30. A process for making the polymeric material comprises polycondensing a mixture of at least one dihydroxybenzene compound and at least one dihydroxybiphenyl compound in the molar proportions 65:35 to 95:5 with at least one dihalobenzophenone in the presence of sodium carbonate and potassium carbonate wherein: (i) the mole % of said potassium carbonate is at least 2.5 and/or (ii) the following relationship applies 

Polymeric materials

An assembly or apparatus for use in relation to an assembly, wherein said assembly is subjected to a temperature of less than &#x2212;50&#xb0; C. in use, wherein said assembly or apparatus includes a component which comprises a polymeric material (A) having a repeat unit of formula &#x2014;O-Ph-O-Ph-CO-Ph- (I) wherein Ph represents a phenylene moiety; and wherein said polymeric material (A) has a melt viscosity of at least 0.50 kNsm.

A polymeric material has a repeat unit of formula &#x2014;O-Ph-O-Ph-CO-Ph-I and a repeat unit of formula &#x2014;O-Ph-Ph-O-Ph-CO-Ph-II wherein Ph represents a phenylene moiety; wherein the repeat units I and II are in the relative molar properties I:II of from 65:35 to 95:5; wherein log(X %)&#x3e;1.50-0.26 MV; wherein X % refers to the % crystallinity and MV refers to the melt viscosity. A process for making the polymeric material is also disclosed.

Polymeric materials for use in challenging situations in the oil and gas industry (e.g. challenging physical and chemical environments) are described. The polymeric materials comprise a polymeric material having a repeat unit of formula I and a repeat unit of formula II wherein Ph represents a phenylene moiety; wherein the repeat units I and II are in the relative molar proportions 95:5 to 80:20.

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Lancashire, United Kingdom

Richard Luke Ainsworth