BROKEN COLOUR GLASS FOR PRODUCING HOLLOW GLASS MICROSPHERES Russian patent published in 2015 - IPC C03C3/93 

FIELD: chemistry.

SUBSTANCE: invention refers to compositions of broken colour glass for producing light-weight inorganic filling agents that are durable hollow glass microspheres of different grades used to create low-density multilayer construction materials for aircraft engineering, shipbuilding industry and vehicle manufacturing industry. The glass for producing colour glass contains the ingredients in the following proportions, wt %: Na₂O 8.00-20.00; B₂O₃ 8.00-15.00; CaO 4.00-10.00; ZnO 1.00-3.50; ZrO₂ 0.01-0.30; Fe₂O₃ 0.01-0.50; TiO₂ 0.0-0.40; Al₂O₃ 0.0-1.00; SO₃ 0.50-1.50; CrO₃ 0.001-0.20; MoO₃ 0.001-0.20; SiO₂ the rest.

EFFECT: producing the glass microspheres having a true density of 0,15-0,40 g/cm³ and high durability.

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