A kind of preparation method of viscosity-reducing and anti-mud type polycarboxylate water reducer
A polycarboxylic acid, anti-mud technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of poor mud resistance, insignificant viscosity reduction effect and low dosage sensitivity of high-strength concrete and other problems, to achieve the effect of good adaptability, good viscosity reduction effect and high reactivity
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Embodiment 1
[0045] (1) Preparation of methallyl polyoxyethylene ether phosphate monomer (PP)
[0046] In parts by mass, add 100 parts of methallyl polyoxyethylene ether (HPEG, molecular weight 1200) and 10 parts of pyrophosphoric acid into a three-necked flask, pass nitrogen gas to remove water and oxygen, and react at 90°C for 10 hours. After completion, add 30 parts of deionized water to obtain methallyl polyoxyethylene ether phosphate monomer (PP).
[0047] (2) Preparation of nonylphenol polyoxyethylene ether methacrylate monomer (WP)
[0048] In parts by mass, add 100 parts of nonylphenol polyoxyethylene ether (APEO, molecular weight 600), 20 parts of methacrylic acid, 0.5-5.0 parts of p-toluenesulfonic acid and 0.3-3.0 parts of hydroquinone into the reaction flask , feed nitrogen to remove water and oxygen, heat to 110°C, react at this temperature for 5h, after the reaction, add 30 parts of deionized water to obtain nonylphenol polyoxyethylene ether methacrylate monomer (WP).
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Embodiment 2
[0054] Functionalized monomer methallyl polyoxyethylene ether phosphate monomer (PP), nonylphenol polyoxyethylene ether methacrylate monomer (WP) and polyethylene glycol monomethyl ether methacrylate ( MP) is prepared respectively with embodiment 1 (1), (2) and (3).
[0055] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer
[0056] In parts by mass, 80 parts of methallyl polyoxyethylene ether phosphate monomer (PP), 40 parts of nonylphenol polyoxyethylene ether methacrylate monomer (WP), 40 parts of polyethylene glycol Monomethyl ether methacrylate (MP), 5 parts of acrylic acid and 100 parts of water were mixed and stirred to dissolve, and 4.0 parts of hydrogen peroxide was added, and the reaction was carried out at 25°C. Add dropwise the first mixed solution obtained by mixing 30 parts of acrylic acid and 50 parts of deionized water, and complete the dropwise addition within 2.5 hours; The second mixed solution obtained was added drop...
Embodiment 3
[0058] Functionalized monomer methallyl polyoxyethylene ether phosphate monomer (PP), nonylphenol polyoxyethylene ether methacrylate monomer (WP) and polyethylene glycol monomethyl ether methacrylate ( MP) is prepared respectively with embodiment 1 (1), (2) and (3).
[0059] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer
[0060] In parts by mass, 80 parts of methallyl polyoxyethylene ether phosphate monomer (PP), 60 parts of nonylphenol polyoxyethylene ether methacrylate monomer (WP), 60 parts of polyethylene glycol Monomethyl ether methacrylate (MP), 10 parts of acrylic acid and 100 parts of water were mixed and stirred to dissolve, and 5.0 parts of hydrogen peroxide was added, and the reaction was carried out at 25°C. Add dropwise the first mixed solution obtained by mixing 30 parts of acrylic acid and 50 parts of deionized water, and complete the dropwise addition within 2.5 hours; The second mixed solution obtained was added dro...
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