METHOD OF PROCESSING POLYORGANOSILOXANES Russian patent published in 2024 - IPC C08J11/10 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering of high-molecular organosilicon compounds. Disclosed is a method of processing linear, branched, cross-linked high-molecular polyorganosiloxanes and cross-linked filled silicones based thereon to cyclic and linear structure diorganosiloxanes, which involves reaction of polyorganosiloxanes of general formula (I), where R¹ and R² independently denote H, CH₃, C₂H₅, C₃H₈, C₄H₉, C₂H₃, C₃H₅, C₆H₅; R³ denotes H, CH₃, C₂H₅, C₃H₈, C₄H₉, C₂H₃, C₃H₅, C₆H₅, OH, with water in liquid ammonia medium in autoclave at 100–200 °C. Method makes it possible to control composition of obtained mixture of diorganosiloxanes depending on conditions and reuse spent ammonia without additional purification procedures.

EFFECT: universal technological method which provides processing of filled silicone wastes of various types to diorganosiloxanes of cyclic and linear structure and does not require use of organic solvents and catalysts.

1 cl, 1 tbl, 8 ex