Insulative coating composition

Details Insulative coating composition Insulative coating composition

1987-03-31

1988-08-09

Capella, Steven

Stock material or miscellaneous articles

Composite

Of silicon containing

106 19, 106 84, 148 60, 148113, 428454, C04B 1204, H01F 104

Patent

active

047627530

ABSTRACT:
A coating composition is disclosed consisting essentially of sodium silicate, magnesium oxide or magnesium hydroxide, titanium oxide and mica. Coatings from this composition are useful as electrically insulating coatings, particularly as applied to electrical steel sheets for magnetic cores, or to other metal products or substrates. The coating may be cured at temperatures within the range of 400.degree. to 500.degree. F. and provides reduced die wear of electrical steel sheet during punching operations. It also is tightly adherent and retains excellent electrical insulating properties after annealing at temperatures within the range of 1350.degree. to 1550.degree. F.

REFERENCES:
patent: 1750305 (1930-03-01), Gross
patent: 1924311 (1931-01-01), Frey
patent: 1982179 (1934-11-01), Scharschu
patent: 2739085 (1956-03-01), McBride
patent: 3732115 (1973-05-01), Lankard et al.
patent: 3804650 (1974-04-01), Meissner et al.
patent: 4144074 (1979-03-01), Itoh et al.
patent: 4533573 (1985-08-01), Perfetti

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