FIBER GLASS COMPOSITIONS Russian patent published in 2009 - IPC C03C13/02 

FIELD: construction.

SUBSTANCE: glass fiber composition contains the following components in wt %: from 57 to 60.8 of SiO₂, from 0 to 2 of Na₂O, from 22 to 25 of CaO, from 12 to 13.6 of Al₂O₃, up to 0.5 of Fe₂O₃, from 0 to 2 of K₂O, from 1.7 to 3 of MgO, from 0.5 to 2 of TiO₂, from 0.6 to 1.5 of Li₂O, 2.0 of B₂O₃. Composition has moulding temperature at logarithm of viscosity 3 not higher than 1230°C, on the basis of standard for comparison NIST 714, value of ΔT is at least 50°C, and ratio of SiO₂/RO does not exceed 2.42.

EFFECT: reduced moulding temperature and liquidus temperature, improved ecology.

12 cl, 6 tbl, 6 dwg