METHOD OF PRODUCING BUTANEDIOL DIMETHACRYLATES Russian patent published in 2013 - IPC C07C67/03 C07C67/54 C07C67/62 C07C69/54 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing butanediol dimethacrylates, involving transesterification of an ester of methacrylic acid with butanediol, formed by an alcohol, containing 1-4 carbon atoms, in the presence of a catalyst, where the catalyst used is a combination which contains at least one lithium compound and at least one calcium compound, wherein at least one of the lithium and/or calcium compounds is an oxide, hydroxide, alkoxide containing 1-4 carbon atoms, or a carboxylate containing 1-4 carbon atoms, and the reaction takes place in the presence of water in amount of 0.005-8 wt % with respect to the weight of the butanediol used at the beginning of the reaction, with optional ageing of said amount of water for the entire transesterification process.

EFFECT: method enables to obtain butanediol methacrylates at a very low cost and having very high purity.

35 cl, 6 ex