Fluorine-free superopaque enamel frits
US5013362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1990 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | Apr 23, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/481
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Fluorine-free titanium white enamel frits for enamelling steel consisting essentially of: PA0 35 to 45 parts by weight of the sum of SiO.sub.2 and ZrO.sub.2, PA0 18 to 22 parts by weight of TiO.sub.2, PA0 18 to 22 parts by weight of the sum of B.sub.2 O.sub.3 and Al.sub.2 O.sub.3, PA0 15 to 18 parts by weight of alkali metal oxides, PA0 2.5 to 4.5 parts by weight of P.sub.2 O.sub.5, and PA0 0.8 to 1.4 parts by weight alkaline earth metal oxides; PA0 with the proviso that the ratio of atomic numbers is as follows: PA1 (A+2B) to C is 0.9.+-.0.05, PA1 (lithium+0.5 magnesium) to phosphorous is 1.+-.0.1, and sodium to potassium is 1.2 to 2.6, PA1 wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.