Antistatic and electrically conducting polymers and moulding materials
AssigneeCiba-Geigy Corporation
InventorsJurgen Finter, Bruno Hilti, Carl W. Mayer, Ernst Minder, Josef Pfeifer
Life of this patent
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Abstract
As a result of the action of electron acceptors, for example chlorine, bromine and/or iodine, on compositions containing a linear, branched or structurally crosslinked polymer and an unsubstituted or substituted tetrathionaphthalene, tetraselenonaphthalene, tetratelluronaphthalene, tetrathiotetracene, tetraselenotetracene or tetratellurotetracene, electrical conductivity is imparted to the compositions through the formation of charge-transfer complexes. These compositions are suitable for the production of mouldings, filaments, fibres, coatings and composite materials which have an antistatic finish or are electrically conducting.
Claims13
A composition containing
- (a) a linear, branched or structurally crosslinked soluble polymer which is inert towards component (b) and
- (b) a compound of the formula I or Ia or mixtures thereof ##STR9## in which X is S, Se or Te, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another are a hydrogen atom or Cl or R.sup.1 and R.sup.2 and also R.sup.3 and R.sup.4 together are each ##STR10## or R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each phenylthio, 4-methylphenylthio, 4-methoxyphenylthio or 4-pyridylthio, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 independently of one another are H or F, R.sup.5 is CH.sub.3 and R.sup.6, R.sup.7 and R.sup.8 are H, or R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are CH.sub.3, R.sup.5 and R.sup.6 are CH.sub.3 or Cl, and R.sup.7 and R.sup.8 are H, or R.sup.5 and R.sup.6 are H, R.sup.7 is --COR.sup.9 and R.sup.8 is H or --COR.sup.9, or R.sup.5 and R.sup.6 are H and R.sup.7 together are --CO--O--CO or --CO--NR.sup.10 --CO-- in which R.sup.9 is halide, --OH, --NH.sub.2 or the radical of an alcohol or a primary of secondary amine, or R.sup.9 is OM in which M is a cation and R.sup.10 is H or the radical of a primary amine reduced by the NH.sub.2 group, wherein the component (b) is present in an amount of 0.01 to 20% by weight, relative to the polymer.
Dependencies are inferred from the claim text.