Method of producing compounds with terminal oh groups

Details Method of producing compounds with terminal oh groups Method of producing compounds with terminal oh groups

C - Chemistry, Metallurgy

08

G

C08G 64/30 (2006.01) C08G 18/44 (2006.01) C08G 64/02 (2006.01) C08G 64/18 (2006.01) C08G 64/40 (2006.01)

Patent

CA 2336400

The present invention relates to a method for preparing compounds comprising terminal OH groups, wherein said method involves reacting diols comprising terminal CH2OH groups with dimethyl carbonate in the presence of a catalyst. The methanol thus generated is continuously evacuated by distillation and the used catalyst is eventually deactivated. The selection of special parameters for the method and the substance enables the production of products which are particularly well adapted to the preparation of linear polyurethane due to the profile of their properties.

L'invention concerne un procédé permettant de préparer des composés ayant des groupes OH terminaux, selon lequel on fait réagir des diols à groupes CH2OH terminaux, en présence d'un catalyseur avec du carbonate de diméthyle. Le méthanol qui est alors libéré est chassé par distillation en continu et pour finir, le catalyseur utilisé est désactivé. Le choix de paramètres spéciaux en termes de procédé et de substance, permet d'obtenir des produits parfaitement adaptés à la préparation de polyuréthane linéaire, en raison de leur profil de propriétés.

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