Durable glass elements

Details Durable glass elements Durable glass elements

C - Chemistry, Metallurgy

03

C

94/10, 261/14

C03C 3/04 (2006.01) C03C 3/064 (2006.01) C03C 3/14 (2006.01) C03C 12/02 (2006.01) C03C 13/04 (2006.01)

Patent

CA 1105949

ABSTRACT Glass microspheres and other glass elements based on B2O3, BaO, and TiO2 have an improved combination of crushing strength, index of refraction, and, especially in some formulations, chemical resistance. The microspheres are especially adapted for use as retroreflective elements in pavement markings. Summarizing, ingredients of the new glass elements, in weight-percentages are: B2O3 5-60 TiO2 20-50 BaO and/or SrO 10-35 Alkali-metal oxide selected from Na2O and K2O 0-15 SiO2 0-40 All other ingredients 0-15.

307550

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