| 摘要 |
<p>#CMT# #/CMT# A primary reactant comprising an amino acid and/or amino acid derivative is reacted with a secondary reactant comprising an amine-free carboxylic acid and/or amine-free carboxylic acid derivative, at pH of 7.5-11.5, preferably 8.5-10.5, and setting retarder is manufactured. #CMT# : #/CMT# Independent claims are included for the following: (1) manufacture of hydrate-formed binding agent composition; (2) molded product; and (3) usage of setting retarder. #CMT#USE : #/CMT# Manufacture of setting retarder for hydrate-formed binding agent used for molded product (all claimed). #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Compounds: The amino acid is lysine and/or threonine, preferably lysine. The carboxylic acid derivative is carboxylic acid anhydride, preferably succinic anhydride. A base chosen from sodium hydroxide, potassium hydroxide and calcium oxide is used for adjusting pH.</p> |
