Polyesters containing nonlinear-optical chromophores, and the use thereof
AssigneeBASF SE
InventorsKarl-Heinz Etzbach, Ruediger Sens, Stefan Beckmann
Life of this patent
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Abstract
Polyesters containing nonlinear-optical chromophores, which have mean molecular weights M.sub.w of from 5000 to 500,000 and contain units of the formula (I) ##STR1## where A is a divalent radical, D is an electron donor, G is a heterocyclic ring as electron acceptor, x and y are identical or different numbers, m and n are identical or different numbers, and R.sup.1 and R.sup.2 are identical or different radicals, are suitable, for example, as components in communications technology.
Claims4
A polyester containing nonlinear-optical chromophores, which has a mean molecular weight M.sub.w of from 5000 to 500,000 and contains units of the formula (I) ##STR24## in which A is phenylene, phenylene which is substituted by 1 to 4 C.sub.1 - to C.sub.6 -alkyl or C.sub.1 - to C.sub.6 -alkoxy groups, naphthylene, cycloalkylene having 3 to 8 carbon atoms, alkylene having 1 to 10 carbon atoms or a single bond,
- D is an electron donor,
- G is a heterocyclic ring as electron acceptor,
- x and y are identical or different numbers from 0 to 10,
- m and n are identical or different numbers from 1 to 10,
- R.sup.1 and R.sup.2 are identical or different and are hydrogen, alkyl having 1 to 6 carbon atoms, alkoxy having 1 to 6 carbon atoms, alkyl which is substituted by phenyl or C.sub.1 - to C.sub.4 -alkoxy, CN, NO.sub.2, SO.sub.3 H, CHO or a cross-linkable group.
Dependencies are inferred from the claim text.