FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. Precipitated silica is characterised by a BET specific surface area from 45 to 550 m2/g, content of polycarboxylic acid and the corresponding carboxylate, expressed as the total carbon content, of at least 0.15 wt. %, with aluminum (Al) content of at least 0.20 wt. %. Precipitated silica has molecules of methylglutaric acid on its surface.
EFFECT: invention allows to obtain filler for polymer compositions, which helps to reduce their viscosity while maintaining mechanical properties.
20 cl, 5 tbl, 3 ex
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