PHOSPHOR SUSPENSION FOR GAS-DISCHARGE LIGHT SOURCES Russian patent published in 1995 - IPC

FIELD: manufacture of fluorescent lamps. SUBSTANCE: phosphor suspension for gas-discharge light sources that has phosphor, binder, fixing agent, and solvent (water) uses mixture of Ba and Ca meta-borates as fixing agents in equal proportions and calcium pyrophosphate in equal proportion to mixture of Ba and Ca meta-borates. Proportion of sum of masses of solid phases of fixing agent to mass of phosphor is 0.001-0.004 and binder solvent mass to solid phase mass ratio is 0.7-1.0. Mentioned proportions are taken in following quantities, mass-h: phosphor -100; binder (0.5-1-% aqueous solution of ammonium salt of methyl methacrylate and methacrylic acid; copolymer)-70-100; fixing agent (mixture of Ba and Ca meta-borates and calcium perphosphate)- 0.1-0.4; solvent water to viscosity affording utmost phosphor coating. EFFECT: improved composition. 2 tbl