HIGH-MODULUS GLASS FIBRE COMPOSITION, GLASS FIBRE AND COMPOSITE MATERIAL ON ITS BASIS Russian patent published in 2023 - IPC C03C13/02 

FIELD: glass fibre composition.

SUBSTANCE: present invention provides a glass fibre composition suitable for large-scale production of high modulus glass fibre, as well as glass fibre and a composite material based on it. The composition of high modulus glass fibre contains the following components in amounts expressed as a percentage by weight: 43-58 SiO₂, 15,5-23 Al₂O₃, 8-18 MgO, 25 or more Al₂O₃+MgO, 0.1-7.5 CaO, 7.1-22 Y₂O₃, 16,5 or more MgO+Y₂O₃, 0.01-5 TiO₂, 0.01-1,5 Fe₂O₃, 0.01-2 Na₂O, 0-1.5 K₂O, 0-0.9 Li₂O, 0-4 SrO and 0-5 La₂O₃+CeO₂, where С3=Y₂O₃/CaO is 1.9 or more.

EFFECT: composition significantly increases the elastic modulus of the glass fibre, significantly reduces the melt glass clearing temperature, and improves the melt glass clearing performance; it also improves the cooling characteristics of the fibreglass and reduces the crystallization rate.

14 cl, 5 tbl, 35 ex