Fluorine-free superopaque enamel frits
First Claim
1. Fluorine-free, opaque titanium white enamel frits having improved covering power for enamelling steel consisting essentially of:
- 35 to 45 parts by weight of SiO2, ZrO2 or a mixture thereof,18 to 22 parts by weight of TiO2,18 to 22 parts by weight of B2 O3, Al2 O3 or a mixture thereof, 15 to 18 parts by weight of a mixture of lithium, sodium and potassium oxides,2.5 to 4.5 parts by weight of P2 O5, and0.8 to 1.4 parts by weight of magnesium oxide,with the proviso that the ratio of atomic numbers is as follows;
(A+2B) to C is 0.9±
0.05,(lithium+0.5 magnesium) to phosphorus is 1±
0.1, and sodium to potassium is 1.2 to 2.6,wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms.
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Abstract
Fluorine-free titanium white enamel frits for enamelling steel consisting essentially of:
35 to 45 parts by weight of the sum of SiO2 and ZrO2,
18 to 22 parts by weight of TiO2,
18 to 22 parts by weight of the sum of B2 O3 and Al2 O3,
15 to 18 parts by weight of alkali metal oxides,
2.5 to 4.5 parts by weight of P2 O5, and
0.8 to 1.4 parts by weight alkaline earth metal oxides;
with the proviso that the ratio of atomic numbers is as follows:
(A+2B) to C is 0.9±0.05,
(lithium+0.5 magnesium) to phosphorous is 1±0.1, and sodium to potassium is 1.2 to 2.6,
wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms.
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Citations
10 Claims
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1. Fluorine-free, opaque titanium white enamel frits having improved covering power for enamelling steel consisting essentially of:
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35 to 45 parts by weight of SiO2, ZrO2 or a mixture thereof, 18 to 22 parts by weight of TiO2, 18 to 22 parts by weight of B2 O3, Al2 O3 or a mixture thereof, 15 to 18 parts by weight of a mixture of lithium, sodium and potassium oxides, 2.5 to 4.5 parts by weight of P2 O5, and 0.8 to 1.4 parts by weight of magnesium oxide, with the proviso that the ratio of atomic numbers is as follows; (A+2B) to C is 0.9±
0.05,(lithium+0.5 magnesium) to phosphorus is 1±
0.1, and sodium to potassium is 1.2 to 2.6,wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Fluorine-free opaque titanium white enamel frits having improved covering power for enamelling steel consisting essentially of:
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38 to 41 parts by weight of SiO2, ZrO2 or a mixture thereof. 20 to 22 parts by weight of TiO2, 18 to 20 parts by weight of B2 O3, Al2 O3 or a mixture thereof, 16 to 18 parts by weight of a mixture of lithium, sodium and potassium oxides, 2.5 to 3.5 parts by weight of P2 O5, and 0.8 to 1.1 parts by weight of magnesium oxide; with the proviso that the ratio of atomic numbers is as follows; (A+2B) to C is 0.9±
0.05,(lithium+0.5 magnesium) to phosphorous is 1±
0.1, and sodium to potassium is 1.2 to 2.6,wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms. - View Dependent Claims (10)
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Specification
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- Resources
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Current AssigneeBayer AG
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Original AssigneeBayer AG
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InventorsSchittenhelm, Hans-Joachim, Joseph, Werner
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Primary Examiner(s)Bell, Mark L.
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Assistant Examiner(s)Green, Anthony J.
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Application NumberUS07/512,565Time in Patent Office379 DaysField of Search501/24, 501/65, 501/66, 501/67, 501/69, 501/70, 501/73, 501/77US Class Current501/24CPC Class CodesC03C 8/08 containing phosphorusC04B 35/481 containing silicon, e.g. zi...
