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US 4,906,784 AGranted
Thermoplastic polyetherketones
AssigneeAmoco Corporation
InventorGeorge A. Skoler
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AssigneeAmoco Corporation
InventorGeorge A. Skoler
Estimating the term…
The invention relates to tough, crystalline polyetherketones, processes for making them and monomers used in their manufacture. The polyetherketones are derived from monomers which provide the repeating polymer unit -(-O-Ph-CO-Ph-CO-Ph-).gtoreq.2- in the polymer chain. The polyetherketones are the etherification reaction product of X-Ph-CO-Ph-[ -CO-Ph-].sub.1 -[-Ph-CO-Ph-(-CO-Ph-).sub.o -].sub.m -X wherein X is a halogen such as fluorine and chlorine, l, m and o are individually 0 or 1, with a bisphenol of the formula HO-Ph-(-Y-Ph-).sub.p -OH, wherein p is 0, 1 or 2, -Y- is -CO- or -O- in either occurence, and an aromatic hydroxy halide of the formula HO-Ph-CO-Ph-CO-Ph-X, wherein X is as described above, and wherein -Ph- is 1,4-phenylene, said polyetherketone having an ether to ketone molar ration of less than 2/1 and greater than 1/2, and an inherent viscosity of at least 0.6.
A tough, crystalline copolyetherketone containing (a) a linear molecular chain of ether and ketone units separated by 1,4-phenylene units, (b) an ether to ketone molar ratio of less than 2/1 and greater than 1/2, (c) the units
The polyetherketone etherification reaction product of
H--(--O--Ph--CO--Ph--CO--Ph--).sub.z --X, wherein --Ph-- is 1,4-phenylene, X is halogen and z is a positive integer of at least one.
A mixture of
The mixture of claim 12 wherein HO--Ph--CO--Ph--CO--Ph--X comprises at least 95 mole percent of the mixture.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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,…
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
Term ended 6 Mar 2007 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The invention relates to tough, crystalline aromatic polyetherketones, processes for making them and monomers used in their manufacture. The polyetherketones are derived from monomers which provide the repeating polymer unit
--(--O--Ph--CO--Ph--CO--Ph--).sub..gtoreq.2 -- in the polymer chain.
4,4'-difluorobenzophenone (21.82 g., 0.10M), hydroquinone (11.01 g., 0.10M), 4-hydroxybenzoyl-4'-fluorobenzophenone (32 g., 0.10M) and diphenylsulfone (118 g.) are charged to a 3-necked glass flask equipped with a stirrer, nitrogen inlet and an air condenser. The charge is heated with stirring to 200.degree. C. to form a solution and, while maintaining a nitrogen blanket, anhydrous potassium carbonate (14.0 g., 0.101 M sieved through a 300 um sieve) is added. The temperature is raised to 200.degree. C. and maintained for 1 hour; the temperature is then raised to 250.degree. C. and maintained there for 1 hour; finally, the temperature is raised to 320.degree. C. and maintained for 1 hour, the resulting polymer being in solution by this stage. The mixture is cooled (without end stopping) and the resulting solid reaction product is milled so as to pass through a 500 um sieve. Diphenylsulfone and inorganic salts are removed by washing successively with acetone (twice), water (three times), and acetone/methanol (twice).
The resulting solid polymer is dried at 140.degree. C. under vacuum. The polymer which has the repeat units
--[--O--Ph--O--Ph--CO--Ph--]-- --[--O--Ph--CO--Ph--CO--Ph--]--