| 摘要 |
<p>Combined set- and hardening accelerator composition for use in cement and a method for the manufacture of the same. The composition comprises calcium, anions and an amine compound and is manufactured by providing a reaction mixture comprising (i) an aqueous solution of calcium ions, anions and an ammonium source chosen from the group consisting of ammonium ions and ammonia, and (ii) an epoxy compound, whereby the reaction admixture is maintained at a pH and at a pressure and a temperature sufficient to convert at least partially the epoxy compound and the ammonia to amine containing reaction products. Epichlorohydrin is used as the epoxy compound, thus obtaining the reaction product mono-, di- and/or tri-(3-chloro-propane-2-ol)-amine in a mixture with calcium ions and various anions.</p> |
