A kind of polycarboxylate agricultural dispersant and preparation method thereof
A technology of dispersant and polycarboxylic acid, which is applied in the field of polycarboxylate agricultural dispersant and its preparation, can solve the problems of unsafe and environmental protection, and achieve the effect of good dispersion performance and simple process synthesis
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Embodiment 1
[0026] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 66 parts of acrylic acid, 15 parts of propyl acrylate, 17 parts of allyloxy hydroxypropyl sodium sulfonate, and 5 parts of ammonium persulfate , 31 parts of sodium hydroxide, 200 parts of water.
[0027] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:
[0028] (1) 5g ammonium persulfate is poured into 7.5g water, is mixed with 40% initiator solution;
[0029] (2) Add 192.5 g of water into the reaction kettle, then add 17 g of sodium allyloxy hydroxypropyl sulfonate, 66 g of acrylic acid, and 15 g of propyl acrylate in sequence, and start stirring at a stirring speed of 900 rpm;
[0030] (3) Airtight, heat up to 85°C;
[0031] (4) dripping initiator solution, the dropping time is 0.5h;
[0032] (5) After the dropwise addition, continue to keep the temperature and stir for 1h;
[0033] (6) Cool, add...
Embodiment 2
[0037] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 61 parts of acrylic acid, 18 parts of ethyl acrylate, 19 parts of allyloxy hydroxypropyl sodium sulfonate, and 15 parts of ammonium persulfate , 29 parts of ammonia, and 150 parts of water.
[0038] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:
[0039] (1) 15g ammonium persulfate is poured into 29g water, is mixed with 34% initiator solution;
[0040] (2) Add 121g of water into the reaction kettle, then add 19g sodium allyloxy hydroxypropyl sulfonate, 61g acrylic acid, and 18g ethyl acrylate by weight in sequence, start stirring, and the stirring speed is 500 rpm;
[0041] (3) airtight and heat up to 95°C;
[0042] (4) dripping initiator solution, the dropping time is 3h;
[0043] (5) After the dropwise addition, continue to keep the temperature and stir for 1h;
[0044] (6) cooling, adding amm...
Embodiment 3
[0048] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 44 parts of acrylic acid, 27 parts of butyl acrylate, 28 parts of allyloxy hydroxypropyl sodium sulfonate, and 10 parts of sodium persulfate , 21 parts of sodium carbonate, and 200 parts of water.
[0049] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:
[0050] (1) 10g sodium persulfate is poured into 23g water, is mixed with 30% initiator solution;
[0051] (2) Add 177g of water to the reaction kettle, then add 28g of allyloxy hydroxypropyl sodium sulfonate, 44g of acrylic acid, and 27g of butyl acrylate in turn by weight, start stirring, and the stirring speed is 900 rpm;
[0052] (3) Airtight, heat up to 100°C;
[0053] (4) dripping initiator solution, the dropping time is 2h;
[0054] (5) After the dropwise addition, continue to keep the temperature and stir for 2h;
[0055] (6) Cool, add sod...
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