Polymers obtained from polynitroaromatic compounds
AssigneeDynamit Nobel Aktiengesellschaft
InventorsRainer Hagel, Klaus Redecker
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Abstract
A polymer having aromatic or heterocyclic rings as the only structural elements said aromatic or heterocyclic rings containing at least two nitro groups is disclosed as well as a method of preparing the same. The polymers are useful as binding agents for thermo stable propellants and can be easily formed into films. They remain thermally stable up to temperatures of at least 200.degree. C.
Claims20
A polymer having an aromatic or heterocyclic ring as the only structural element, said polymer containing at least 2 nitro groups on said aromatic or heterocyclic ring, the hetero atom of said hetercyclic ring being oxygen, nitrogen, or sulfur, the polymer having at least four recurring units and up to 20 recurring units said aromatic or heterocyclic ring optionally containing, in addition to said nitro groups, a hydroxy, methyl or methoxy group.
A polymer having the recurring unit which is the divalent radical of a compound of the formula ##STR8## wherein A represents oxygen or a moiety of the group ##STR9## y=0 or 1, said divalent radical being formed by removal of 2 hydrogen atoms bonded to carbocyclic carbon atoms, having at least four recurring units.
A homopolymer having a recurring unit of the formula ##STR10## wherein x is 2 to 3,
- n is 4 to 20 and
- Ar is a methyl, methoxy, or hydroxy substituted or unsubstituted arylene radical, fused arylene-heterocyclic radical or a divalent heterocyclic radical where the hetero atom is oxygen, nitrogen, or sulfur.
A process for preparing a polymer which comprises contacting a compound of the formula ##STR12## in which A is --O--, --CH.dbd.CH--, --NH--, or ##STR13## W represents a halogen, p, q, x, and z each individually represent values of 2 or 3
- with copper at an elevated temperature.
Dependencies are inferred from the claim text.