METHOD OF OBTAINING HIGHLY FUNCTIONAL POLYELEMENTORGANOSILOXANES Russian patent published in 2015 - IPC C08G77/06 C08G77/56 C08G77/58 

FIELD: chemistry.

SUBSTANCE: claimed is a method of obtaining highly functional branched polyelementorganosiloxanes by the hydrolytic polycondensation of elementorganic compounds R_xE(OZ)_v-x (where E=B, Si, Ti; R=H, alkyl-,haloidalkyl, aryl-, vinyl; Z=H, alkyl C_nH_2n+1 (n=1÷4), x=0÷ν, ν is element E valency), characterised by the fact that the hydrolytic polycondensation is carried out in a non-equilibrium way without the application of a solvent by the stoichiometric quantity of water m=0.5÷2.0 g-mole per 1 g-mole of compounds R_xE(OZ)_v-x of a specified conversion of functional groups OZ, which determines the molecular weight of the polymer, by the continuous removal of ZOH byproducts in vacuum at 50-80°C.

EFFECT: method eliminates the necessity of the solvent application, which reduces the price of the process and increases its environmental friendliness.

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