ENAMEL Russian patent published in 2008 - IPC C03C8/06 

FIELD: chemistry.

SUBSTANCE: invention relates to composition of enamels for coating products from cast iron and steel. Technical result of the invention lies in increase of impact strength of enamel coating and reduction of duration of enamel cooking. Enamel contains the following components, mass %: SiO₂ - 40.0-45.0; Al₂O₃ - 1.2-1.6; CaO - 8.0-10.0; MgO - 1.5-3.0; Na₂O - 18.0-22.0; TiO₂ - 10.0-15.0; Fe₂O₃ - 0.2-0.4; K₂O - 1.0-2.0; Cr₂O₃ - 0.2-0.4; Na₂SiF₆ - 5.5-8.0; B₂O₃ - 3.0-4.0.

EFFECT: increase of impact strength of enamel coating and reduction of duration of enamel cooking.

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