Process for preparation of pigment coated phosphor

Details Process for preparation of pigment coated phosphor Process for preparation of pigment coated phosphor

1990-07-06

1991-12-31

Beck, Shrive

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

427 64, 427 68, 427 71, B05D 724

Patent

active

050770888

ABSTRACT:
A process for preparation of pigment coated phosphor comprises: preparing a phosphor solution by mixing an acryl emulsion and phosphor particles; preparing a pigment solution by mixing polyvinyl alcohol and pigment particles; mixing the two solutions; adding an acid solution to adjust the mixture to a pH of 3 to 7; and adding oxalic acid as a curing agent, thereby attaching the pigment particles to the phosphor particles.

REFERENCES:
patent: 4128674 (1978-12-01), Hedler
patent: 4152483 (1979-05-01), Kanda et al.
patent: 4695478 (1987-09-01), Schulze et al.
patent: 4853254 (1989-08-01), Wolfe
patent: 4859497 (1989-08-01), Wolfe et al.

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