METHOD OF PRODUCING ORGANOSILSEQUIOXANES Russian patent published in 2011 - IPC C08G77/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a composition which contains organosilsequioxanes. Disclosed is a method of preparing a composition which contains organosilsequioxanes, comprising the following steps: (1) partial hydrolysis of hydrolysing inorganic monomer precursors which contain at least 50 mol % first hydrolysing inorganic monomer precursors of formula RSiY₃, where R is selected from (cyclo)alkyl, aryl, alkenyl, epoxy-, (meth)acrylic, ester, amino-, mercapto- and cyanate groups and mixtures thereof, the R-Si bond is a non-hydrolysing bond, each Y group is identical or different from every other Y group of the alkoxy group; (2) cooling the liquid composition before completing condensation of inorganic monomers with an amount of water which, combined with water used at step (1), and any water separated during condensation of inorganic monomers at step (1), exceeds the stoichiometric amount of water needed for complete hydrolysis of all present precursors of hydrolysing inorganic monomers; and (3) drying the composition, wherein the total amount of water used is at least 5 times more than the stoichiometric amount of water needed for complete hydrolysis of all present hydrolysing monomer precursors.

EFFECT: controlled and fast preparation of a wide range of organosilsequioxane-containing compositions which are suitable for producing protective coatings and as binding agents.

17 cl, 21 ex