METHOD FOR OBTAINING SOLUBLE POLYMETHYLSILSEQUIOXANES Russian patent published in 2023 - IPC C08G77/06 C08G77/14 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of organosiloxane polymers and in particular to a method for obtaining polymethylsilsesquioxanes soluble in organic solvents using methyltrialkoxysilanes as starting compounds. A method is proposed for obtaining polymethylsilsesquioxane soluble in organic solvents, which includes hydrolytic polycondensation of methyltrialkoxysilane of the general formula MeSi(OAlk)₃, where Alk denotes С₁-С₂ alkyl in the absence of organic solvents and catalysts, while the reaction is carried out at a molar ratio of MeSi(OAlk)₃ and water from 1:1.5 to 1:9 at a temperature of 30-50°C by irradiating the reaction mixture with microwave radiation with a power of 20 W-300 W for 5-300 minutes.

EFFECT: creating an economical and environmentally friendly method for obtaining soluble polymethylsilsesquioxanes without the use of organic solvents and catalysts, and, accordingly, without the need to isolate and purify the product.

1 cl, 4 dwg, 1 tbl, 6 ex