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A kind of polycarboxylate water-reducing agent for gypsum-based self-leveling mortar and its preparation method and using method

A self-leveling mortar, polycarboxylic acid technology, applied in the field of water reducing agent, can solve problems such as poor adaptability, and achieve the effects of increasing the length of the main chain, good water reduction effect, and short synthesis reaction time

Active Publication Date: 2022-07-19
连云港石化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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

Method used

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  • A kind of polycarboxylate water-reducing agent for gypsum-based self-leveling mortar and its preparation method and using method
  • A kind of polycarboxylate water-reducing agent for gypsum-based self-leveling mortar and its preparation method and using method
  • A kind of polycarboxylate water-reducing agent for gypsum-based self-leveling mortar and its preparation method and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a polycarboxylic acid-based water-reducing agent, comprising the following steps:

[0026] (1) under 0 ℃ and stirring state, dropwise add solution A and solution B to the polymerization reaction kettle that has been put into base material C, carry out polymerization reaction, and continue to ripen after the time of polymerization reaction is to drop solution A and solution B Reaction 90min shall prevail;

[0027]Among them, the timing of adding solution B is earlier than that of solution A, the dripping speed of solution A is subject to 10min uniform addition, and the dripping speed of solution B is subject to 20min uniform addition; the composition of solution A is: 10 parts of acrylic acid, rich 1 part of maleic acid, 0.5 part of dimethyldiallyl 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 part of mercaptoacetic acid , 0.01 part of merc...

Embodiment 2～5

[0032] According to the method and steps of Example 1, according to the formula and operating parameters of Table 1, the polycarboxylic acid-based water reducing agent was prepared.

[0033] Table 1

[0034]

[0035]

[0036]

[0037] The polycarboxylic acid-based water-reducing agent obtained in the above Examples 1-5 was added to the gypsum-based self-leveling mortar, and its performance was tested. Table 2 below.

[0038] Table 2

[0039]

[0040] Among them, Comparative Example 1 is a commercially available naphthalene-based water-reducing agent, provided by Weifang Yingda Chemical Co., Ltd.; Comparative Example 2 is a commercially available polycarboxylic acid-based water-reducing agent ZJ-8300, provided by Jiangsu Zhaojia Building Materials Technology Co., Ltd.

[0041] The performance testing results of the polycarboxylic acid-based water reducing agents prepared in Examples 1 to 5 are shown in Table 2. As can be seen from Table 2, when the polycarboxylic...

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Abstract

The invention discloses a method for using a polycarboxylic acid-based water-reducing agent for gypsum-based self-leveling mortar. The water-reducing agent comprises the following components in parts by weight: 100 parts of polyether, 6-10 parts of acrylic acid, and fumaric acid. 1-2 parts of acid, 0.2-1 part of methyl acrylate, 0.2-1 part of butyl acrylate, 0.5-2 parts of dimethyl diallyl ammonium chloride, 0.01-0.05 part of diethylene glycol divinyl ether, 0.01-0.05 part of triethylene glycol divinyl ether, 2-5 parts of hydrogen peroxide, 0.02-0.1 part of reducing agent E51, 0.02-0.1 part of reducing agent FF6, 0.001-0.005 part of ferrous sulfate, 0.01-0.05 part of mercaptopropionic acid , 0.01-0.05 parts of thioglycolic acid, 0.01-0.05 parts of mercaptoethanol, 0.5-2.5 parts of sodium hypophosphite, 12-20 parts of sodium hydroxide and 80-160 parts of water. The water reducing agent has good adaptability to by-product gypsum.

Description

technical field [0001] The invention relates to the technical field of water-reducing agents, in particular to a polycarboxylic acid-based water-reducing agent for gypsum-based self-leveling mortar and a preparation method and a use method thereof. Background technique [0002] Gypsum-based self-leveling mortar, also known as self-leveling gypsum and self-leveling floor leveling gypsum, is a kind of indoor floor leveling specially formulated and uniformly prepared by gypsum materials, special fillers and various construction chemical additives in the factory. 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, feels warm and comfortable on the feet, and has a certain sound insulation effect and thermal insulation performance. Yes, it is beneficial to building energy efficiency. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/02C08F226/02C08F216/12C08F220/14C08F220/18C04B24/26C04B103/30
CPCC08F283/065C04B28/145C04B24/2694C04B2201/50C04B2103/302C04B18/0445C04B7/02C04B14/04C04B18/146C04B22/064C04B2103/0057C04B2103/50C04B2103/304C04B24/06C08F220/06C08F222/02C08F226/02C08F216/125C08F220/14C08F220/1804
Inventor 罗琼杨卫东朱卫刚朱晓东郑铁成胡晓宇
Owner 连云港石化有限公司
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