Method of forming coated layer of fluorescent substance on inner

Details Method of forming coated layer of fluorescent substance on inner Method of forming coated layer of fluorescent substance on inner

1978-12-15

1980-10-28

Hoffman, James R.

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427106, 427157, 427226, B05D 302, B05D 722, H01J 6146, C09K 1102

Patent

active

042307414

ABSTRACT:
Method for coating fluorescent material on the inner surface of a bulb using a coating lacquer comprising an aqueous suspension of the finely divided fluorescent material, an organic water soluble polymer, a surfactant, and colloidal alumina as a binder, the improvement which comprises incorporating boric acid and hydrogen peroxide in the suspension. When the coated lacquer is burned out by heating the bulb, the boric acid melt coats the alumina binder to render same inactive for gas absorption and the hydrogen peroxide accelerates the combustion or burning out of the organic polymer and surfactant from the coated lacquer.

REFERENCES:
patent: Re20909 (1938-11-01), Claude
patent: 2706691 (1955-04-01), Schaeter
patent: 3503780 (1970-03-01), Kamiya
patent: 3514276 (1970-05-01), Fugio
patent: 3832199 (1974-08-01), Repsher
patent: 3833392 (1974-09-01), Repsher
patent: 3847643 (1974-11-01), Hammer
patent: 3963639 (1976-06-01), Klein
patent: 4121132 (1978-10-01), Repsher
patent: 4123563 (1978-10-01), Mitade

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