Class of stabilizing compounds for phosphor screens
AssigneeAgfa-Gevaert
InventorsPaul Leblans, Paul Lardon, Jean-Marie Dewanckele
Life of this patent
Estimating the term…
Abstract
A phosphor screen is provided comprising a satiblizer being an organic compound or an oligomeric or polymeric compound comprising moieties corresponding to the following general formula I: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a substituted or unsubstituted alkyl- or aryl group, R.sup.5 represents hydrogen or a substituted or unsibstituted alkyl group and Z represents the atoms necessary to form a substituted or unsubstituted 5 to 8 membered ring.
Claims7
A phosphor screen, characterised in that said screen comprises at least one stabilizer being an organic compound or an oligomeric or polymeric compound comprising moieties corresponding to the following general formula I:
- ##STR8## wherein:
- R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represent a substituted unsubstituted alkyl- or aryl group,
- R.sup.5 represents hydrogen or a substituted or unsibstituted alkyl group and
- Z represents the atoms necessary to form a substituted or unsubstituted 5 to 8 membered ring.
Dependencies are inferred from the claim text.