NANOSIZED MODIFIED MOLECULAR SILICA SOLS AND PRODUCTION METHOD THEREOF Russian patent published in 2012 - IPC C01B33/145 C08G77/02 B82B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of novel nanosized silica nanofiller materials for different polymer matrices. The modified organo-inorganic molecular silica sols of general formula: [SiO₂]_n[SiO_1,5(CH₂)₃NRC(O)-Alk]m (I), where R denotes H or CH₃; n is an integer from 40 to 20000; m is an integer from 20 to 10000; Alk is a C₉-C₁₇ hydrocarbon radical. The method of producing the modified organo-inorganic molecular silica sols involves first carrying out polycondensation of tetraethoxysilane in anhydrous acetic acid to obtain a given value of molecular weight of the inorganic part of the molecule, followed by addition of alkylamide trialkoxysilane into the reaction mixture, selected from alkylamide trialkoxysilanes of general formula: (R'O)₃Si(CH₂)₃NRC(O)-Alk (II), where R and Alk assume values given above; R' denotes CH₃- or C₂H₅-.

EFFECT: invention enables to produce novel nanosized modified molecular silica sols which can be used as components of polymer nanocomposites.

9 cl, 2 dwg, 1 tbl