NOVEL METHOD FOR PREPARING PRECIPITATED SILICA, NOVEL PRECIPITATED SILICA AND USE THEREOF, IN PARTICULAR FOR STRENGTHENING POLYMERS Russian patent published in 2018 - IPC C01B33/193 C09C1/30 C09C3/06 C09C3/08 C08K3/36 C08K5/92 C08K9/02 C08K9/04 

FIELD: manufacturing technology; chemistry.

SUBSTANCE: invention can be used in the production of tyres, floor coverings, insulation materials. Disclosed is precipitated silica, wherein BET specific surface area ranges from 45 to 550 m²/g, total content of polycarboxylic acid and the corresponding carboxylate, expressed as the total carbon content, is at least 0.15 wt%. Polycarboxylic acid is succinic acid. Aluminum content is at least 0.20 wt%, and the dispersion component of surface energy γ_s^d – less than 43 mJ/m².

EFFECT: invention enables to obtain filler for polymer compositions which reduces their viscosity and improves dynamic properties.

17 cl, 10 tbl, 4 ex