| abstract |
An ether polycarboxylic acid slump-retaining agent and preparation method thereof, the preparation method comprising: performing esterification with an unsaturated carboxylic acid and/or anhydride and an unsaturated carboxylic acid hydroxyl ester to prepare a difunctional monomer. Compared with a method for preparing the difunctional monomer by performing esterification or amidation with a diamine or diol and alkenyl acid, the preparation method of the present invention prepares the difunctional monomer only via a unilateral esterification reaction, the reaction being easier to carry out and faster. |