A kind of polycarboxylate cationic anti-mud agent and its preparation method and application
A polycarboxylic acid-based, cationic technology, applied in the field of concrete admixtures, can solve problems such as limited adaptability, achieve the effects of reducing slump loss, improving initial fluidity, and enhancing dispersion effect
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Embodiment 1
[0020] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials in parts by weight: 49 parts of maleic anhydride, 45 parts of N,N dimethylethanolamine, 47 parts of sodium chloroacetate, 36 parts of acrylic acid, methyl 65 parts of hydroxypropyl acrylate, 11.2 parts of sodium methacrylate, 2.1 parts of ammonium persulfate, 2.2 parts of 30% hydrogen peroxide, 150 parts of acetone, 2.2 parts of VC, 50 parts of 32% aqueous sodium hydroxide solution, deionized water Appropriate amount.
[0021] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:
[0022] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant speed, control the dropping time for 20 minutes, keep at a constant temperature of 10°C for 5 hours, then heat to 65°C to evaporate acetone, cool ;
[0023] 2) Add 200 parts of deionized water to step 1), adjust the pH of the system to 9 with sodium hydroxide solution,...
Embodiment 2
[0029] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials in parts by weight: 49 parts of maleic anhydride, 90 parts of N,N dimethylethanolamine, 50 parts of sodium chloroacetate, 40 parts of acrylic acid, methyl 60 parts of hydroxypropyl acrylate, 14 parts of sodium methacrylate, 3.1 parts of ammonium persulfate, 1.2 parts of 30% hydrogen peroxide, 150 parts of acetone, 2 parts of VC, 55 parts of 32% aqueous sodium hydroxide solution, deionized water Appropriate amount.
[0030] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:
[0031] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant speed, control the dropping time for 20 minutes, keep at a constant temperature of 10°C for 5 hours, then heat to 65°C to evaporate acetone, cool ;
[0032] 2) Add 200 parts of deionized water to step 1), adjust the pH of the system to 9 with sodium hydroxide solution, add...
Embodiment 3
[0038] A polycarboxylic acid cationic anti-mud agent, made of the following raw materials in parts by weight: 60 parts of maleic anhydride, 50 parts of N,N dimethylethanolamine, 50 parts of sodium chloroacetate, 40 parts of acrylic acid, methyl 70 parts of hydroxypropyl acrylate, 10 parts of sodium methacrylate, 3.5 parts of potassium persulfate, 2 parts of 30% hydrogen peroxide, 200 parts of acetone, 2 parts of VC, 56 parts of 32% aqueous sodium hydroxide solution, deionized water Appropriate amount.
[0039] The preparation method of polycarboxylate cationic anti-mud agent comprises the following steps:
[0040] 1) Dissolve maleic anhydride in acetone, add N,N dimethylethanolamine dropwise at a constant speed, control the dropping time for 15 minutes, keep at a constant temperature of 15°C for 5 hours, then heat to 65°C to evaporate acetone, cool ;
[0041] 2) Add an appropriate amount of deionized water to step 1), adjust the pH of the system to 9 with sodium hydroxide so...
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