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US 5,212,278 AGranted
Polyarylene ethers
AssigneeCiba-Geigy Corporation
InventorsRudolf Pfaendner, Thomas Kainmuller, Kurt Hoffmann, Andreas Kramer, Friedrich Stockinger
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AssigneeCiba-Geigy Corporation
InventorsRudolf Pfaendner, Thomas Kainmuller, Kurt Hoffmann, Andreas Kramer, Friedrich Stockinger
Estimating the term…
The invention relates to polyarylene ethers which contain, based on the total amount of structural elements present in the polyether resin, 5-100 mol % of a recurring structural element of the formula I ##STR1## and 0-95 mol % of a recurring structural element of the formula II ##STR2## in which X and X' independently of one another are --SO--, --SO.sub.2 -- or --CO--, one of the radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups and the remaining radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen, (C.sub.1 -C.sub.4)alkyl, phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups, and A is an aromatic radical, at least 25% of the bonds X and/or Y and/or the bridge members contained in A being --SO.sub.2 --. These industrial materials are distinguished by very good mechanical properties and good solubility.
A polyarylene ether which consists essentially of based on the total amount of structural elements present in the polyether resin, 5-100 mol % of a recurring structural element of the formula I ##STR8## and 0-95 mol % of a recurring structural element of the formula II ##STR9## in which X and X' independently of one another are --SO--, --SO.sub.2 -- or --CO--, one of the radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups and the remaining radicals R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another are hydrogen, (C.sub.1 -C.sub.4)alkyl, phenyl or phenyl which is substituted by one to three (C.sub.1 -C.sub.4)alkyl groups, and A is a group of the formulae IIIa to IIIg ##STR10## in which Y is --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --C(CH.sub.3)(C.sub.6 H.sub.5)--, --C(CF.sub.3).sub.2 --, --S--, --SO--, --SO.sub.2 --, --O-- or --CO--, with the proviso that at least 25% of the bonds X and/or X' and/or Y are --SO.sub.2 --.
Dependencies are inferred from the claim text.