Precoating color television picture tube faceplate panels to pro

Details Precoating color television picture tube faceplate panels to pro Precoating color television picture tube faceplate panels to pro

1974-09-16

1976-02-24

Husack, Ralph

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 72, B05D 506

Patent

active

039405087

ABSTRACT:
An improved precoat layer of highly insoluble, low molecular weight polyvinyl alcohol is uniformly thinly dispersed and dried upon the interior surface of a television picture tube faceplate panel. The precoat is applied by a slurry process with the aqueous slurry containing a predetermined amount of the normally soluble, low molecular weight polyvinyl alcohol and with the material being rendered highly insoluble by adjusting the pH value of the aqueous slurry to a value of less than about 3. The uniformly dispersed and dried precoat provides a highly adherent layer on the glass faceplate panel and the subsequently deposited phosphor pattern is highly adherent to this layer.

REFERENCES:
patent: 3269838 (1966-08-01), Saulnier
patent: 3712815 (1973-01-01), Rohrer et al.

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