Diazo resin composition with phosphor pigments and process for the manufacture of a screen for cathode ray tubes

Abstract

Abstract This invention relates to a light-sensitive copying composition for the manufacture of screens for cathode ray tubes, comprising a dispersion of a phosphor pigment in an aqueous solution of a hydrophilic cross-linkable binder and a sensitizer, the sensitizer being a condensation product of an aromatic diazonium compound containing recurrent units of the general types A-N2X and B, which are connected by methylene groups, said units A-N2X being derived from compounds of the general formula (R1-R3)pR2N2X wherein X is the anion of an aliphatic monosulfonic acid with one to six carbon atoms, P IS AN INTEGER FROM 1 TO 3, R1 is a carbocyclic or heterocyclic aromatic group, having at least one condensable position, R2 is an arylene group of the benzene or naphthalene series, R3 is either a single bond or one of the following groups: -(CH2)q-NR4-(CH2)q-NR4-(CH2)r-NR5-O-(CH2)r-NR4-S-(CH2)r-NR4-O-R6-O-O-S-CO -NR4-SO2-NR4wherein Q IS AN INTEGER FROM 0 TO 5, R IS AN INTEGER FROM 2 TO 5, R4 is either hydrogen, or an alkyl group with one to five carbon atoms, or an aralkyl group with seven to 12 carbon atoms, or an aryl group with six to 12 carbon atoms, R5 is hydrogen or an alkyl group with one to five carbon atoms, and R6 is an arylene group with six to 12 carbon atoms AND SAID UNITS B being radicals, free of diazonium groups, of the following compounds: aromatic amines, phenols, thiophenols, phenol ethers, aromatic thioethers, aromatic hydrocarbons, aromatic heterocyclic compounds, or organic acid amides. The invention also includes a process for the manufacture of a screen for a cathode ray tube employing the novel light-sensitive composition.

Inventors

• 👤 Eberhard Gesswein
• 👤 Werner Moller
• 👤 Hans Ruckert

Bibliographic Details