METHOD FOR PRODUCING CYCLOSILOXANE POLYOLS Russian patent published in 2015 - IPC C08G77/16 

FIELD: chemistry.

SUBSTANCE: invention refers to a method for producing stereoregular phenyl- and methylsiloxane macrocycles containing a hydroxyl group at every silicon atom. What is presented is a method for producing stereoregular cyclosiloxane polyols of general formula [RSi(O)OH]_n, wherein R = Ph or Me, n = 4, 6, 12, by decomposing framework metallosiloxanes specified among [RSi(O)OM]₄L_x,{(RSiO₂)₆Ni₄M₄(NaOH)₂}L_x, {M₄[RSi(O)O]₁₂Cu₄}L_x, wherein R = Me or Ph, M = Na or K, L = n-BuOH, EtOH or H₂O, x = 8-12 in an aqueous medium saturated with carbon dioxide at pressure from 150 to 350 atm and at temperature 20-60°C; after carbon dioxide is separated, the end product is recovered with using known procedures, then washed in acetic acid and water successfully.

EFFECT: presented method is more environmentally compatible than any known methods, as it eliminates a necessity of using hydrochloric acid and large amounts of an organic solvent.

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