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

1998-05-14

1999-07-20

Silverman, Stanley S.

Glass manufacturing

Processes

With coating

65 6053, 501 17, 427165, C03C 1700, C03C 2502, C03C 814, B05D 500

Patent

active

059251603

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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