C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
261/14
C03C 3/066 (2006.01) C03C 8/04 (2006.01) C03C 8/06 (2006.01) C03C 8/08 (2006.01)
Patent
CA 1193289
ABSTRACT OF THE DISCLOSURE A lead-free low-melting frit is made by combin- ing raw materials in amounts such that the product will have a specific oxide analysis, melting the raw mater- ials at a temperature greater than 1000°C and cooling the thus-formed fused glass in a manner such that a frit is formed. The low-melting frit has the following oxide analysis: 7 - 12.5 parts by weight alkali oxide selected from 2-9 parts by weight Na2O and 2-7 parts by weight Li2O; 23 - 34 parts by weight B2O3; 2 - 4 parts by weight Al2O3; 30 - 45 parts by weight SiO2; 0.75 - 4 parts by weight F; 2 - 4 parts by weight P2O5; 4 - 8 parts by weight ZnO; and 2 - 5 parts by weight TiO2. These frits are durable, have an incipient fusion point less than about 450°C and a coefficient of thermal expansion less than 10 x 10-6 cm/cm/°C. The frits of the present invention are particularly useful as compo- nents in vitrifiable glass decorating colors.
423210
Marcoux & Sher Swabey Mitchell Houle
Mobay Chemical Corporation
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