| 主权项 |
1. A method for synthesizing a group of novel α/α′-alkoxylated glycerol linear carbonic esters wherein the following are placed in contact at a reaction temperature lower than about 220° C.:
i. a quantity of at least one precursor selected from the group consisting of α/α′-alkoxylated glycerol cyclic carbonates of a formula (XXII): wherein R4, R5 and R6 are selected from the group consisting of hydrogen (H) and organic groups formed of at least two atoms attached via covalent bonds, the at least two atoms selected from the group consisting of carbon (C), hydrogen (H), oxygen (O) and nitrogen (N); ii. a quantity of at least one catalyst selected from the group consisting of metal oxides, metal alkoxides, Lewis acids, organometallic catalysts and mineral bases; and iii. a quantity of at least one organic initiator selected from the group consisting of alcohols, polyols and amino-alcohols, wherein at a first step of the method the at least one precursor, the at least one catalyst and the at least one organic initiator are mixed and heated in a gas-tight sealed reactor until they reach the reaction temperature and a pressure called an autogenous pressure inside the sealed reactor which is higher than atmospheric pressure, and wherein at a second step of the method at the reaction temperature, a gaseous composition is allowed to escape to reduce the autogenous pressure inside the sealed reactor and the reaction temperature is maintained in the sealed reactor for a time of more than about 5 min. |
