Compositions: coating or plastic – Coating or plastic compositions – Inorganic materials only containing at least one metal atom
Patent
1992-03-23
1993-04-20
Brunsman, David
Compositions: coating or plastic
Coating or plastic compositions
Inorganic materials only containing at least one metal atom
106691, 501 97, 501105, 501130, 501131, C04B 1410, C04B 1202
Patent
active
052039153
ABSTRACT:
It is disclosed that the properties of a ceramic mullite-kaolinite based passivating coating composition applied as a collar to metal oxide varistor valve block cylindrical surfaces are improved by including in the coating composition from 0.03 to 15% by weight of the coating composition one or more of the following additive compounds: TiO.sub.2 ; Y.sub.2 O.sub.3 ; ZrO.sub.2 ; ZnO; Boroflux (2ZnO.multidot.3B.sub.2 O.sub.3 .multidot.7H.sub.2 O; or 3ZnO.multidot.2B.sub.2 O.sub.3 .multidot.5H.sub.2 (O); or Si.sub.3 N.sub.4. The coating composition comprises by dry weight a mixture of 55-85% mullite and 15-45% kaolinite, one or a mixture of the above additive compounds, and sufficient water to form a sprayable slurry. The inclusion of the additive compound results in enhanced contact adhesion between the collar and the metal oxide varistor peripheral surface.
REFERENCES:
patent: 3128194 (1964-04-01), Christie, Jr.
patent: 4046847 (1977-09-01), Kresge
Ceramic Industry, "Material's Handbook", vol. 132, No. 1, Solon, Ohio, pp. 21, 73, Jan. 1973.
'Hubbell Incorporated
Berdo Robert H.
Brunsman David
Presson Jerry M.
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