Polycarboxylate-type water reducing agent for gypsum-based self-leveling mortar and preparation method and use method thereof
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A technology of self-leveling mortar and polycarboxylic acid series, which is applied in the field of water reducing agent, can solve the problems of poor adaptability and achieve the effects of increasing the length of the main chain, good water reducing effect and high polyether activity
Active Publication Date: 2021-10-22
连云港石化有限公司
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[0004] Aiming at the defect in the prior art that the polycarboxylate water reducer has poor adaptability to the by-product gypsum, the present invention provides a polycarboxylate water reducer for gypsum-based self-leveling mortar and its preparation method and use method , the polycarboxylate water reducer has good adaptability to by-product gypsum, high water reducing rate, good slump retention effect, fast setting, small shrinkage, and high strength, and can be widely used in the field of gypsum-based self-leveling mortar
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Embodiment 1
[0025] A kind of preparation method of polycarboxylate water reducer, it comprises the following steps:
[0026] (1) At 0°C and in a stirring state, add solution A and solution B dropwise to the polymerization reactor that has been put into the base material C to carry out the polymerization reaction. The time of the polymerization reaction is to continue to mature after the solution A and solution B are dropped. The reaction time is 90 minutes;
[0027]Among them, the timing of adding solution B is earlier than that of solution A, the addition rate of solution A is based on the addition of 10 minutes at a constant speed, and the addition of solution B is based on the addition of 20 minutes at a constant speed; the composition of solution A is: 10 parts of acrylic acid, rich 1 part of malic acid, 0.5 part of dimethyl diallyl ammonium chloride, 0.01 part of diethylene glycol divinyl ether, 0.01 part of triethylene glycol divinyl ether, 0.01 part of mercaptopropionic acid, 0.01 ...
Embodiment 2～5
[0032] According to the method and steps of Example 1, according to the formula and operating parameters in Table 1, a polycarboxylate water reducer was prepared.
[0033] Table 1
[0034]
[0035]
[0036]
[0037] The polycarboxylate water reducer obtained in the above Examples 1-5 was added to the gypsum-based self-leveling mortar, and its performance was tested.
[0038] See Table 2 below.
[0039]
[0040] Among them, Comparative Example 1 is a commercially available naphthalene-based water reducer, provided by Weifang Yingda Chemical Co., Ltd.; Comparative Example 2 is a commercially available polycarboxylate-based water reducer ZJ-8300, provided by Jiangsu Zhaojia Building Materials Technology Co., Ltd.
[0041] The performance testing results of the polycarboxylate water reducers prepared in Examples 1-5 are shown in Table 2. It can be seen from Table 2 that when the polycarboxylate water-reducer of the present invention is added to the gypsum-based self-...
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Abstract
The invention discloses a polycarboxylate-type water reducing agent for gypsum-based self-leveling mortar and a preparation method and a use method thereof. The polycarboxylate-type water reducing agent is prepared from the following components in parts by weight: 100 parts of polyether, 6 to 10 parts of acrylic acid, 1 to 2 parts of fumaric acid, 0.2 to 1 part of methyl acrylate, 0.2 to 1 part of butyl acrylate, 0.5 to 2 parts of dimethyl diallyl ammonium chloride, 0.01 to 0.05 part of diethylene glycol divinyl ether, 0.01 to 0.05 part of triethylene glycol divinyl ether, 2 to 5 parts of hydrogen peroxide, 0.02 to 0.1 part of a reducing agent E51, 0.02 to 0.1 part of a reducing agent FF6, 0.001 to 0.005 part of ferrous sulfate, 0.01 to 0.05 part of mercaptopropionic acid, 0.01 to 0.05 part of mercaptoacetic acid, 0.01 to 0.05 part of mercaptoethanol, 0.5 to 2.5 parts of sodium hypophosphite, 12 to 20 parts of sodium hydroxide and 80 to 160 parts of water. The invention provides polycarboxylate-type water reducing agent for the gypsum-based self-leveling mortar and the preparation method and the use method thereof. The polycarboxylate-type water reducing agent is good in adaptability to byproduct gypsum, high in water reducing rate, good in slump retaining effect, fast in coagulation, small in shrinkage and high in strength, and can be widely applied to the field of gypsum-based self-leveling mortar.
Description
technical field [0001] The invention relates to the technical field of water reducers, in particular to a polycarboxylate water reducer for gypsum-based self-leveling mortar and its preparation and use methods. Background technique [0002] Gypsum-based self-leveling mortar, also known as self-leveling gypsum, self-leveling ground leveling gypsum, is a kind of indoor ground leveling specially prepared by gypsum materials, special fillers and various construction chemical additives in the factory and mixed evenly. dry powder mortar. The construction of gypsum-based self-leveling mortar has the advantages of fast speed, high efficiency, simple process, and low labor intensity, and the floor after gypsum-based self-leveling and hardening has certain elasticity, the foot feels warm and comfortable, and has a certain sound insulation effect and thermal insulation performance. Well, it is conducive to building energy saving. At the same time, with the rapid development of my cou...
Claims
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