A kind of hydroxypiperazine concrete glue reducer and preparation method thereof

[0031] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0032]

[0033] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0034] 1) N-Hydroxyethylpiperazine, pentasodium diethylenetriaminepentacarboxylate and sodium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, and be warming up to 80 °C after the raw materials are dissolved. ℃ and constant, holding the reaction for 1.2h;

[0035] 2) then add fumaric acid and polyethylene glycol (400) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 7% in the solution system, and the temperature is controlled at 85 ℃, control the dripping speed, ensure that the dripping time is 2h, and continue the constant temperature r...

[0038] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0039]

[0040] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0041] 1) N,N'-bis(2-hydroxyethyl)piperazine, pentasodium diethylenetriaminepentacarboxylate, sodium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, After the raw materials are dissolved, the temperature is raised to 85 °C and kept constant, and the reaction is kept for 1 h;

[0042] 2) then add fumaric acid and polyethylene glycol (400) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 5% in the solution system, and the temperature is controlled at 85 ℃, control the dripping speed, ensure that the dripping time is 1.8h, and continue the...

[0045] A hydroxypiperazine type concrete glue reducer and preparation method thereof, comprising the following raw materials by weight:

[0046]

[0047] The preparation method of a hydroxypiperazine concrete glue reducer according to the present invention is realized by the following steps:

[0048] 1) N,N'-bis(2-hydroxypropyl)piperazine, pentasodium diethylenetriaminepentacarboxylate, potassium nitrate are added to the condensation reaction tank, add a certain amount of water to open stirring and gradually heat up, After the raw materials are dissolved, the temperature is raised to 90°C and kept constant, and the reaction is kept for 1.2h;

[0049]2) then add fumaric acid and polyethylene glycol (800) to the reaction tank, after stirring, start to drip the ammonium persulfate solution whose mass percentage concentration is 6% in the solution system, and the temperature is controlled at 90 ℃, control the dripping speed, ensure that the dripping time is 2h, and continue th...