The present invention relates to a process for the preparation of an aromatic polyetherketone which process comprises: a) self-condensing a compound of formula I in the presence of an alkyl or optionally substituted aryl sulphonic acid solvent and in the absence of phosphorous pentoxide; or b) condensing a compound ...

Polyetheretherketone (PEEK) may be prepared by polycondensation of a single monomer (4-fluoro-4"-(4-hydroxyphenoxy) benzophenone) in diphenylsulphone (DPS) solvent and in the presence of sodium carbonate and potassium carbonate. The process can be used to produce high quality, relatively light coloured polymers hav...

Polymers comprising polyetheretheretherketone and polyetherdiphenyletherketone and polymers comprising polyetheretheretherketone and polyetheretherethersulphone are described which have advantageous Tn and/or Tg properties.

A polymeric material has a repeat unit of formula- O-Ph-O-Ph-CO-Ph- I and a repeat unit of formula -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 logic (X%) > 1.50 - 0.26 MV; wherein X% refer...

A polyetheretherketone film is used in the consolidation of a prepreg so that the film becomes incorporated into the consolidated prepreg, defines an outer layer of the consolidated prepreg and therefore provides the consolidated prepreg with advantageous properties. In one embodiment, a film may be used as a baggin...

A polymeric material includes phenyl moieties, ketone moieties and ether moieties in the polymeric backbone of said polymeric material, wherein the difference between the nucleation temperature (Tn) and the glass transitio temperature (Tg) of said polymeric material is greater than 23°C.

There is provided a pack comprising a polymeric material having a melt viscosity (MV) in the range 0.05 to 0.12 kNsm-2 wherein said polymeric material is of a type which includes: (a) phenyl moieties; (b) carbonyl moieties; and (c) ether moieties. Preferably the polymeric material is selected from is polyetheretherk...

A cage (100) for roller bearings includes a body (110) which has the outer surface covered by a Polyetheretherketones (PEEK) containing coating layer (120). The Polyetheretherketones (PEEK) containing coating layer (120) can remain on the surface of the cage (100) for a long period of time to increase the life span ...

A composition comprises a first polymeric material having a melt viscosity of 0.15 kNsm2 or less and liquid crystal polymer. The first polymeric material is preferably a polyaryletherketone. A composite material which comprises high levels of fillers in combination with the aforementioned composition is also describ...

Polyaryletherketones and a method for producing the same are described wherein, for a given melt viscosity, the melt flow index is higher than expected. Such polymers may be used in situations where relative high flow is desirable.

There is provided a pack comprising a polymeric material having a melt viscosity (MV) in the range 0.05 to 0.12 kNsm-2 wherein said polymeric material is of a type which includes: (a) phenyl moieties; (b) carbonyl moieties; and (c) ether moieties. Preferably the polymeric material is selected from is polyetheretherk...

A method of making a composite material comprises selecting a polymeric material which may be a polyaryletherketone, having a melt viscosity in the range 0.05 to 0.12 kNsm-2 and contacting said polymeric material with a filler means, wherein said filler means is preferably a discontinuous filler means. ...

A method of making a polymeric material is described, the method comprising contacting, for example poly&sgr;ondensing, a compound of formula: (I) with a compound of formula: (II) wherein each X is selected from a group comprising a chlorine and a fluorine atom, n represents 1, 2 or 3 and each Y is selected from a g...

A method of making a foamed material comprises heating a mixture which includes a polymer, especially a polyaryletherketone polymer, and a decomposable material, especially magnesium hydroxide or aluminium hydroxide/hydrated alumina, to a foaming temperature at or above the decomposition temperature of the decomposa...

A method for manufacture of PEEK-PEDEK copolymers is disclosed along with copolymers formed by the method and their use. The method includes a nucleophilic polycondensation of a mixture of dihydroxybenzene and dihydroxybiphenyl with 4,4"-dihalobenzophenone in a reaction mixture comprising sodium carbonate and potass...

Polyaryletherketones are produced which are end capped with a phenylethynyl containing moiety. The end capped material having a relatively low molecular weight may be subjected to a thermal cycle to produce a higher molecular weight material having excellent mechanical properties a relatively high level of cryst...

The present invention relates to a method of purifying a polymeric material, the method including contacting the polymeric material which is in solid form and which includes .less than 1 wt% of polycondensation solvent with a solvent formulation which is at a temperature of greater than 100°C and a pressure ...

A method for manufacture of PEEK-PEDEK copolymers is disclosed along with copolymers formed by the method and their use. The method includes a nucleophilic polycondensation of a mixture of dihydroxybenzene and dihydroxybiphenyl with 4,4'-dihalobenzophenone in a reaction mixture comprising sodium carbonate and potass...

There is disclosed polymers, a process for manufacturing polymers and uses of the polymers. The polymers are polyaryl ether ketones and the process includes a nucleophilic polycondensation of a bisphenol with an organic dihalide compound in a reaction mixture comprising sodium carbonate and potassium carbonate, in a...

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 cop...