METHOD OF PRODUCING ω, ω'-DIHYDROXYOLIGO-DIALKYLSILOXANES Russian patent published in 2012 - IPC C08G77/16 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing ω,ω'-dihydroxyoligo-dialkylsiloxanes of general formula HO-[SiR₁R₂O]_n-H, where R₁=-CH₂, -C₂H₅; R₂=-C₂H₅; n=10-30, through aqueous hydrolysis of dialkyldichlorosilanes in the presence of calcium chloride at temperature 30±2°C with total functionality of the system equal to 2, with concentration of calcium chloride in the formed water-calcium chloride-hydrogen chloride ternary mixture equal to 28-30 wt %, and 15-20 wt % concentration of hydrogen chloride.

EFFECT: obtaining oligoorganosiloxanes which are stable during storage owing to lower content of low-molecular dialkylcyclosiloxanes; obtained oligoorganosiloxanes have valuable physical and mechanical characteristics, can be used independently or can serve as the basis for obtaining novel products with valuable service properties.

1 cl, 6 ex