| 摘要 |
A reactive atmosphere or gaseous composition (A) applicable in processes for the continuous and/or discontinuous solid phase polymerisation of polyester in order to achieve molecular weight increase and, particularly, to be sent into contact with the polyester granules during the reaction step in aforesaid polymerisation processes, said reactive atmosphere (A) comprising at least a reactive substance, or a mixture of reactive substances, (R) preferably diluted under gas and/or aerosol phase into e carrying fluid (V) and a purging inert gas, or a mixture of inert gases, (G) purified and heated, said reactive substance, or mixture of reactive substances, (R) being selected from the category of the molecules that have reactive end-groups with respect to the groups forming the polyesters macromolecules and said purging inert gas (G) being preferably saturated of reactive substance and/or of carrying fluid become reactive. |
