Solid flaky polycarboxylate water-reducer and polymerization preparation method thereof
A polycarboxylate and superplasticizer technology, applied in the field of polycarboxylate superplasticizers, can solve problems such as inapplicability, and achieve high conversion rate, better slump retention, and high branched chain density
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[0033] Example 1
[0034] A solid sheet-shaped polycarboxylic acid water-reducing agent body, the water-reducing agent is formed by the polymerization of the following components, the total mass of raw materials is 1,000 parts, and the components and process parameters are as follows:
[0035] Put 855 parts of allyl polyoxyethylene ether in the reaction vessel, without adding water or any organic solvent, heating to 65℃; stirring slowly, control the speed to 15 rpm / min, until the solution has no obvious lumps or flakes ;
[0036] Until the allyl polyoxyethylene ether is completely dissolved, speed up the stirring speed to 85 rpm / min and continue stirring;
[0037] Put 3 parts of sodium vinyl sulfonate, 2 parts of sodium hypophosphite, 2.5 parts of lauryl peroxide, 8 parts of itaconic acid and 38 parts of acrylic acid in the melted polyether macromonomer;
[0038] After adding the above-mentioned materials in one go, start to add 76 parts of acrylic acid and 3.5 parts of lauryl mercapta...
Example Embodiment
[0040] Example 2
[0041] A solid sheet-like polycarboxylic acid water reducing agent, the water reducing agent is polymerized by the following components, the total mass of raw materials is 1,000 parts, and the components and process parameters are as follows:
[0042] Put 880 parts of isopentenol polyoxyethylene ether in the reaction vessel, without adding water and any organic solvent, heating to 70℃; stirring slowly, control the speed to 20 rpm / min, until the solution has no obvious lumps or flakes materials;
[0043] Until the prenol polyoxyethylene ether is completely dissolved, speed up the stirring speed to 90 rpm / min and continue stirring;
[0044] Put 3.5 parts of sodium propylene sulfonate, 3 parts of sodium hypophosphite, 3.5 parts of tert-butyl peroxy-t-valerate, 10 parts of fumaric acid and 26.67 parts of acrylic acid in the melted polyether macromonomer;
[0045] After adding the above-mentioned materials in one go, start to add a mixed solution of 53.33 parts of acrylic...
Example Embodiment
[0047] Example 3
[0048] A solid sheet-shaped polycarboxylic acid water-reducing agent body, the water-reducing agent is formed by the polymerization of the following components, the total mass of raw materials is 1,000 parts, and the components and process parameters are as follows:
[0049] Place 886 parts of vinyl butyl ether polyoxyethylene ether in the reaction vessel, without adding water or any organic solvent, heating to 75°C; stirring slowly, controlling the speed at 30 rpm / min, until the solution has no obvious lumps or flakes materials;
[0050] Until the vinyl butyl ether polyoxyethylene is completely dissolved, speed up the stirring speed to 100 rpm / min, and continue stirring;
[0051] Put 4 parts of sodium methacrylic acid sulfonate, 4.5 parts of sodium tripolyphosphate, 4.5 parts of dicyclohexyl peroxydicarbonate, 8.5 parts of fumaric acid and 25 parts of acrylic acid in the melted polyether macromonomer;
[0052] After adding the above-mentioned materials in one go, st...
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