Partially crystallizing lead-free enamel composition for automob

Details Partially crystallizing lead-free enamel composition for automob Partially crystallizing lead-free enamel composition for automob

1999-05-03

2000-02-08

Beck, Shrive

Stock material or miscellaneous articles

Composite

Of quartz or glass

428426, 427165, 4273762, 4273977, 501 17, 501 20, 501 32, 501 79, B32B 1700, B05D 500, C03C 1700

Patent

active

060226242

ABSTRACT:
A ceramic enamel composition contains 40-80% by weight of at least one lead-free metal oxide frit containing precursors of Zn.sub.2 SiO.sub.4, such as ZnO and SiO.sub.2, wherein the amount of Zn.sub.2 SiO.sub.4 precursors is less than about 35% by weight of the at least one lead-free metal oxide frit, 0.05-15% by weight of a zinc silicate seed material, and 19-37% by weight of a pigment. The zinc silicate seed material preferably contains crystalline Zn.sub.2 SiO.sub.4. The enamel preferably also contains a bismuth silicate seed material. The ceramic enamel can be employed as a coating around the periphery of automotive glass and is effective in improving appearance and reducing degradation of underlying adhesives by ultraviolet radiation.

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