METHOD FOR OBTAINING TREATED GLASS FIBRES AND A POLYMER COMPOSITION REINFORCED BY THEM = Russian patent published in 2023 - IPC C03C25/25 C03C25/16 B33Y70/10 C08L79/08 

FIELD: polymer compositions.

SUBSTANCE: method for producing treated glass fibres and polymer compositions reinforced with them. Invention is intended for use as structural polymeric materials in additive technologies. The treatment agent is applied to glass fibres in a solution of4,4'diaminodiphenyl sulfone (DADPS) with a mass concentration of 0.1-0.7% in a mixture of organic solvents: acetone and isopropanol, and step-by-step increase in temperature is carried out in a nitrogen gas medium with simultaneous distillation of the solvent under the following modes: 20°C - 25 min, 30°C - 35 min, 45°C - 20 min, 55°C - 15 min, 65°C - 30 min, 85°C - 30 min. The number of components of the treated fibre corresponds to the ratio, in % by weight: fiberglass 96.5-99.5, DADPS 0.5-3.5. The polymer composition consists of 80% by weight of polyesterimide and 20% by weight of the specified treated glass fibre.

EFFECT: improving the compression strength of the polymer composition due to the introduction of a treatment component, which increases the wettability of the filler and increases the intermolecular interactions between the glass fibre and the polyesterimide matrix.

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