Coating compositions for the inner wall of cathode-ray tube

Details Coating compositions for the inner wall of cathode-ray tube Coating compositions for the inner wall of cathode-ray tube

1995-04-04

1996-11-19

McGinty, Douglas J.

Compositions

Electrically conductive or emissive compositions

Elemental carbon containing

252502, 252506, 252507, 252510, 106626, 427 64, H01B 118, H01J 3100, C01B 3332

Patent

active

055759530

ABSTRACT:
In a coating composition for the inner wall of a cathode-ray tube comprising an aqueous dispersion medium containing potassium silicate, a dispersing agent and graphite particles or a combination of graphite particles and metal oxide particles or metal carbide particles suspended therein, the invention is characterized in that the molar ratio of silicon dioxide to potassium oxide (SiO.sub.2 /K.sub.2 O) in said potassium silicate is in the range of from 4 to 5, and the obtained coating film is characterized in that the adsorption quantity of moisture and gases is small and adhesiveness is excellent.

REFERENCES:
patent: 3791546 (1974-02-01), Maley et al.
patent: 4041347 (1977-08-01), Deal et al.
patent: 4052641 (1977-10-01), Dominick et al.
patent: 4379762 (1983-04-01), Chiyoda et al.
patent: 4425377 (1984-01-01), Deal et al.
patent: 5147460 (1992-09-01), Otaki

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