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Preparation method of esters retarding polycarboxylic acid slump retaining agent
The invention discloses a preparation method of an esters retarding polycarbocylic acid slump retaining agent. The method comprises the following steps that 1, unsaturated carboxylic acid and/or anhydride, alkoxy poly alkylene glycol, hydroxy ethidene diphosphonic acid and/or 2-hydroxyphosphonoacetic acid and polymerization inhibitor are mixed, under the protection of nitrogen, the temperature is increased to range from 40 DEG C to 60 DEG C, a catalyst is added, the temperature is increased to 100-140 DEG C, thermal reaction is conducted for 0.5-3 h, water is removed during the reaction, after reaction is finished, the temperature is cooled to room temperature, and a first mixture is obtained; 2, the first mixture and unsaturated carboxylic acid hydroxyl esters are mixed, and a comonomer mixture solution is obtained; 3, the comonomer mixture solution, an initiator aqueous solution and a molecular weight regulator aqueous solution are dropped in water to conduct reaction, and a copolymer product is obtained; 4, pH of the copolymer product is adjusted to 5-7 through alkali, and the esters retarding polycarbocylic acid slump retaining agent is obtained. According to the preparation method of the esters retarding polycarbocylic acid slump retaining agent, a structure of the hydroxy ethidene diphosphonic acid and/or the 2-hydroxyphosphonoacetic acid is introduced into the esters polycarbocylic acid slump retaining agent, and a finally obtained product has the effects of retardation and slump retaining.
Preparation method of esters retarding polycarboxylic acid slump retaining agent
The invention discloses a preparation method of an esters retarding polycarbocylic acid slump retaining agent. The method comprises the following steps that 1, unsaturated carboxylic acid and/or anhydride, alkoxy poly alkylene glycol, hydroxy ethidene diphosphonic acid and/or 2-hydroxyphosphonoacetic acid and polymerization inhibitor are mixed, under the protection of nitrogen, the temperature is increased to range from 40 DEG C to 60 DEG C, a catalyst is added, the temperature is increased to 100-140 DEG C, thermal reaction is conducted for 0.5-3 h, water is removed during the reaction, after reaction is finished, the temperature is cooled to room temperature, and a first mixture is obtained; 2, the first mixture and unsaturated carboxylic acid hydroxyl esters are mixed, and a comonomer mixture solution is obtained; 3, the comonomer mixture solution, an initiator aqueous solution and a molecular weight regulator aqueous solution are dropped in water to conduct reaction, and a copolymer product is obtained; 4, pH of the copolymer product is adjusted to 5-7 through alkali, and the esters retarding polycarbocylic acid slump retaining agent is obtained. According to the preparation method of the esters retarding polycarbocylic acid slump retaining agent, a structure of the hydroxy ethidene diphosphonic acid and/or the 2-hydroxyphosphonoacetic acid is introduced into the esters polycarbocylic acid slump retaining agent, and a finally obtained product has the effects of retardation and slump retaining.
Preparation method of esters retarding polycarboxylic acid slump retaining agent
JIANG ZHUOJUN (Autor:in) / FANG YUNHUI (Autor:in) / GUAN MENGQIN (Autor:in) / ZHONG LINA (Autor:in) / CHEN XIAOLU (Autor:in) / DAI ZHUDUAN (Autor:in)
20.01.2016
Patent
Elektronische Ressource
Englisch
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