METHOD OF PRODUCING OLIGO-3,3-BIS(AZIDOMETHYL)OXETANE Russian patent published in 2012 - IPC C08G65/325 C08G73/00 C08G65/18 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing oligo-3,3-bis(azidomethyl)oxetane which is used as a hydroxyl-containing compound for producing energy-intensive polyurethane thermoplastic elastomers. The method involves cationic polymerisation of 3,3-bis(chloromethyl)oxetane in methylene chloride at 20-35°C in the presence of 1-10 wt % boron trifluoride etherate and a diatomic alcohol in molar ratio of 1:(5-15) to 3,3-bis(chloromethyl)oxetane. Further, the intermediate oligo-3,3-bis(chloromethyl)oxetane is separated in finely dispersed form, for which at the end of polymerisation, an organic solvent is added to the reaction mass, methylene chloride is evaporated and oligo-3,3-bis(chloromethyl)oxetane is precipitated with water. Sodium azide is then added to the obtained finely dispersed oligo-3,3-bis(chloromethyl)oxetane in a medium of an organic solvent at 90-130°C in the presence of 0.5-3 wt % tetrabutylammonium bromide.

EFFECT: highly efficient method of producing oligo-3,3-bis(azidomethyl)oxetane and high output of the end product.

5 cl, 1 tbl, 7 ex