METHOD FOR OBTAINING FINISHED GLASS FIBRES AND POLYESTERIMIDE COMPOSITES BASED ON THEM Russian patent published in 2023 - IPC C03C25/07 C08J5/08 C08L79/08 C08L81/06 

FIELD: polyether industry.

SUBSTANCE: production of structural products for special purposes in additive techniques. A method is proposed for obtaining a sized glass fibre by applying a sizing agent, which is 1.0-3.5 wt.% of an oligomeric sulfone based on 4,4'-dioxyphthalophenone and 4,4'-dichlorodiphenylsulfone, on glass fibre from a solution with a mass concentration of 0.14-0.49% in 1,4-dioxane, followed by a stepwise rise in temperature to 101°C and simultaneous distillation of the solvent, sized glass fibre obtained by the proposed method, and a polymer composition that contains 80 wt.% of the polymer matrix based on polyesterimide and 20 wt.% of the proposed sized glass fibre.

EFFECT: improved thermal stability of the created polymer composition due to the introduction of a sizing component, which increases the wettability of the filler and increases intermolecular interactions between the glass fibre and the polyesterimide matrix.

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