| 主权项 |
1. A process for preparing a phosphated polycondensate in a reaction mixture, comprising:
subjecting the reaction mixture to a polycondensation reaction in the presence of at least one sulphonic acid as catalyst, wherein (a) the reaction mixture contains at least
(I) a monomer having a polyether side chain and an aromatic or heteroaromatic group, the monomer (I) forming a structural unit (I) in the polycondensate,(II) a phosphated monomer having an aromatic or heteroaromatic group, the monomer (II) forming a structural unit (II) in the polycondensate, and(IV) a monomer having an aldehyde group; or (b) the reaction mixture contains at least
(I) a monomer having a polyether side chain and an aromatic or heteroaromatic group, the monomer (I) forming a structural unit (I) in the polycondensate,(III) a monomer having an aromatic or heteroaromatic group, monomer (III) forming structural unit III in the polycondensate, or being at least partially phosphated during a phosphation reaction, forming the monomer (II) and/or, in the polycondensate, a structural unit (II), and(IV) a monomer having an aldehyde group, and,a phosphating agent,wherein at least partial phosphation of monomer (III) is carried out before, during or after the polycondensation reaction, and, wherein the phosphated polycondensate comprises structural units (I) and (II) when reaction mixture (a) is subjected to the polycondensation reaction, and structural units (I), (II) and (III) when reaction mixture (b) is subjected to the polycondensation reaction. |
