Preparation method of high-adaptability high-solid-content polycarboxylic acid slump retaining agent
An adaptable, high-solids technology, applied in the fields of building materials and concrete admixtures, can solve the problems of performance decline, high cost, equipment duplication, etc., and achieve stable molecular weight distribution, enlarged molecular weight distribution, and smooth transition effects.
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Embodiment 1
[0033]A method for preparing a high-adaptability high-solid polycarboxylate slump-retaining agent, the highly-adaptable high-solid-content polycarboxylate slump-retaining agent is prepared from the following components: polyether macromonomer, azo initiator substance, alcohol organic solvent, alkyl acrylate, acrylic acid, organic peroxy initiator, solubilizer, chain transfer agent, neutralizing agent, water; the total mass is 1000 parts, and the preparation method comprises the following steps:
[0034] 1) Add 580 parts of vinyl butyl ether polyoxyethylene ether and 180 parts of water into the reaction kettle, stir and heat until it dissolves;
[0035] 2) Measure the temperature in the kettle, control the temperature at 75°C, and after the temperature is stable, add 4 parts of the composition of sodium lauryl sulfate and magnesium lauryl sulfate with a mass ratio of 2:1 at one time, and 10 parts with a mass ratio of A 1:1 composition of sodium vinylsulfonate and 2-acrylamide-2...
Embodiment 2
[0039] A method for preparing a high-adaptability high-solid polycarboxylate slump-retaining agent, the highly-adaptable high-solid-content polycarboxylate slump-retaining agent is prepared from the following components: polyether macromonomer, azo initiator substance, alcohol organic solvent, alkyl acrylate, acrylic acid, organic peroxy initiator, solubilizer, chain transfer agent, neutralizing agent, water; the total mass is 1000 parts, and the preparation method comprises the following steps:
[0040] 1) Add 605 parts of prenol polyoxyethylene ether and 200 parts of water into the reaction kettle, stir and heat until it dissolves;
[0041] 2) Measure the temperature in the kettle, control the temperature at 74°C, and after the temperature is stable, add 2.5 parts of a composition of sodium tripolyphosphate and magnesium lauryl sulfate with a mass ratio of 2:1 at one time, and 6 parts with a mass ratio of 1: 1 composition of sodium vinylsulfonate and 2-acrylamide-2-methylpro...
Embodiment 3
[0045] A method for preparing a high-adaptability high-solid polycarboxylate slump-retaining agent, the highly-adaptable high-solid-content polycarboxylate slump-retaining agent is prepared from the following components: polyether macromonomer, azo initiator substance, alcohol organic solvent, alkyl acrylate, acrylic acid, organic peroxy initiator, solubilizer, chain transfer agent, neutralizing agent, water; the total mass is 1000 parts, and the preparation method comprises the following steps:
[0046] 1) Add 570 parts of methallyl polyoxyethylene ether and 185 parts of water into the reaction kettle, stir and heat until it dissolves;
[0047] 2) Measure the temperature in the kettle and control the temperature at 73°C. After the temperature is stable, add 2.8 parts of sodium tripolyphosphate, 7 parts of 2-acrylamide-2-methylpropanesulfonic acid, and 3 parts of diisodicarbonate peroxide at one time. Propyl ester;
[0048] 3) After 5 minutes, start to drop solution B and sol...
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