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US 5,203,902 AGranted
Glass composition for use in glazes or enamels
AssigneeJohnson Matthey Public Limited Company
InventorJohannes J. W. Murkens
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AssigneeJohnson Matthey Public Limited Company
InventorJohannes J. W. Murkens
Estimating the term…
A glass flux composition consisting essentially by weight of 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% Li.sub.2 O, 0-3% Al.sub.2 O.sub.3, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO and 0-0.5% CdO is useful for preparing a glaze or enamel composition especially for application to glass such that the composition is then fired in contact with a mould surface or with another glass surface.
In a method of forming a glaze or enamel coated article, the improvement comprising the step of applying a composition comprising 70-90% by weight of a component consisting essentially of, by weight, 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% B.sub.2 O.sub.3, 3-6% TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% L.sub.2 O 0-3% Al.sub.2 O.sub.3, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO, and 0-0.5% CdO and 10-30% by weight of pigment to the article and then firing the composition.
In a method of forming a curved glass window pane for an automotive vehicle, the improvement wherein an enamel composition comprising 70-90% by weight of a component consisting essentially of, by weight, 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% B.sub.2 O.sub.3, 3-6 TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% Li.sub.2 O, 0-3% Al.sub.2 O.sub.3, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO, and 0-0.5% CdO and 10-30% by weight of pigment is applied to the surface of glass for the window pane, which glass is then adapted by two halves of a mold into the curved shape of the window pane while the composition is fired in contact with a surface of the mold.
In a method of forming a curved glass laminated window pane for an automotive vehicle, the improvement wherein an enamel composition comprising 70-90% by weight of a component consisting essentially of, by weight, 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% B.sub.2 O.sub.3, 3-6% TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% Li.sub.2 O, 0-3% Al.sub.2 O.sub.3, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO, and 0-0.5% CdO and 10-30% by weight of pigment is applied to the surface of one sheet of glass for the laminated window pane, which sheet, together with the second sheet of glass for the laminated window pane, is then shaped by gravity into the curved shape of the window pane while the composition is fired in contact with the second sheet of glass.
In a method of producing a glass window pane for an automobile vehicle, the improvement comprising the step of applying a composition consisting essentially of 70-90% by weight of a component consisting essentially of, by weight, 45-65% Bi.sub.2 O.sub.3, 25-36% SiO.sub.2, 4-6% B.sub.2 O.sub.3, 3-6% TiO.sub.2, 1-3% Na.sub.2 O, 0.5-2% K.sub.2 O, 2-6% Li.sub.2 O, 0-3% Al.sub.2 O.sub.2, 0-1% ZrO.sub.2, 0-1% BaO, 0-1% CaO, 0-1% MgO, 0-1% ZnO, 0-3% PbO and 0-0.5% CdO and 10-30% by weight of pigment to the surface of glass for the window pane and then firing the composition.
Dependencies are inferred from the claim text.
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Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions: glass frit mixtures having non-frit additions, e.g.…
Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions: frit compositions, i.e. in a powdered or comminuted form
Surface treatment of glass, not in the form of fibres or filaments, by coating: with glass
Compositions specially applicable for the manufacture of vitreous glazes
Term ended 20 Apr 2010 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to glass flux compositions for use in glazes or enamels.
Many different ingredients in many different concentrations in many different combinations are known in glass flux compositions or use in glazes or enamels in order to provide the properties desired. These fluxes are admixed with pigment to make the glazes or enamels for application to articles. A surprisingly useful new flux composition has now been discovered.
European patent specification EP-A-0192844 discloses frits for crystallising glazes, consisting by weight of 0-20% CaO, M.sub.0 O, SrO and/or BaO, 3-15% alkali metal oxide, 5-20% ZnO, 0-40% PbO, 0.1-8% Al.sub.2 O.sub.3, 15-60% SiO.sub.2, 5-25% B.sub.2 O.sub.3, characterised in that they contain by weight 2-30% MoO.sub.3 and also 0-40% Bi.sub.2 O.sub.3. the total content of Bi.sub.2 O.sub.3, PbO and/or alkaline earth metal oxides amounting to 5-40% by weight.
The accompanying drawings, FIGS. 1-4 illustrate part of the present method of forming a window pane for an automotive vehicle, as discussed in Examples 33-50 hereafter.
The invention is illustrated by the following Examples.
A flux composition consisting in parts by weight of:
______________________________________ SiO.sub.2 34.43 Bi.sub.2 O.sub.3 49.93 B.sub.2 O.sub.3 4.63 TiO.sub.2 4.83 Li.sub.2 O 3.24 Na.sub.2 O 2.05 K.sub.2 O 0.90 100.01 ______________________________________