A kind of polycarboxylic acid type wet mix mortar plasticizer and preparation method thereof

A wet-mixed mortar and polycarboxylic acid technology, applied in the field of building materials, can solve the problems of poor plastic retention, low compressive strength of mortar, flocculent precipitation, etc., achieve good plastic retention, improve bond strength and workability , the effect of physical stability

Active Publication Date: 2021-01-15
厦门路桥翔通建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method is not only prone to flocculent precipitation due to the compatibility of different components, but also prone to problems such as low compressive strength or poor plastic retention capacity when used.

Method used

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  • A kind of polycarboxylic acid type wet mix mortar plasticizer and preparation method thereof
  • A kind of polycarboxylic acid type wet mix mortar plasticizer and preparation method thereof
  • A kind of polycarboxylic acid type wet mix mortar plasticizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation of embodiment 1 polycarboxylic acid type wet-mix mortar plasticizer

[0017] First, 766.7 parts of acrylamide and 10,000 parts of deionized water are added to the reactor in a certain proportion. The temperature was then controlled at 30°C under constant stirring. Add 26.7 parts of ammonium persulfate into the reaction kettle at one time. 100 parts of acrylic acid, 33.3 parts of sodium methacrylate, 16.7 parts of sodium α-olefin sulfonate, 3.3 parts of n-octanol and other aqueous solutions are added dropwise, and the dripping is completed within 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, a certain amount of liquid caustic soda was added into the reaction kettle to make the pH 5-7, and a new polycarboxylate wet-mix mortar plasticizer with stable physical state was obtained, and the recorded sample was P-1.

Embodiment 2

[0018] The preparation of embodiment 2 polycarboxylic acid type wet-mix mortar plasticizer

[0019] First, 833.3 parts of acrylamide and 8000 parts of deionized water are added to the reactor in a certain proportion. The temperature was then controlled at 25°C with constant stirring. Add 25 parts of ammonium persulfate to the reaction kettle at one time. 100 parts of acrylic acid, 66.7 parts of sodium methacrylate, 26.7 parts of sodium α-olefin sulfonate, 6.7 parts of n-octanol and other aqueous solutions were added dropwise, and the dripping was completed within 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, a certain amount of liquid caustic soda was added to the reaction kettle to make the pH 5-7, and a new polycarboxylate wet-mix mortar plasticizer with stable physical state was obtained, and the recorded sample was P-2.

Embodiment 3

[0020] The preparation of embodiment 3 polycarboxylic acid type wet-mix mortar plasticizer

[0021] First, 500 parts of acrylamide and 12,000 parts of deionized water are added to the reactor in a certain proportion. The temperature was then controlled at 20°C with constant stirring. Add 33.3 parts of sodium persulfate into the reaction kettle at one time. Add dropwise the aqueous solution of 100 parts of methacrylic acid, 50 parts of sodium methacrylate, 20 parts of sodium α-olefin sulfonate, 6.7 parts of n-octanol, 13.3 parts of vitamin C, etc., and control the dripping in 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, a certain amount of liquid caustic soda was added into the reaction kettle to make the pH 5-7, and a new polycarboxylate wet-mix mortar plasticizer with stable physical state was obtained, and the recorded sample was P-3.

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Abstract

The invention discloses a polycarboxylic acid wet-mixing mortar plasticizer and a preparation method thereof. The plasticizer comprises the following components in parts by weight; 100 parts of unsaturated carboxylic acid, 500-850 parts of an unsaturated carboxylic acid derivative, 50-100 parts of unsaturated sulfonate, 3-7 parts of n-caprylic alcohol, 25-35 parts of an initiator, 8000-12000 partsof deionized water and 0-15 parts of vitamin C, and liquid caustic soda is added till a final pH value is 5-7. According to a free polymerization method, a wet-mixing mortar plasticizer product is directly prepared, and the wet-mixing mortar plasticizer product has stable physical states. The wet-mixing mortar plasticizer is of a macromolecule organic structure, is applied to wet-mixing mortar, is not liable to be adsorbed or wrapped by porous substances (such as clay) in aggregate, and thus is good in mortar plasticity maintenance. In addition, the plasticizer is appropriate in reaction condition, free of hot source reaction at a normal temperature, concise in process, environmentally friendly, efficient, and applicable to on-scale industrial production methods.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a polycarboxylic acid type wet-mix mortar plasticizer and a preparation method thereof. Background technique [0002] Wet-mixed mortar admixture is a kind of chemical additive specially suitable for matching with wet-mixed mortar, especially suitable for mortar projects with long construction time requirements. Wet-mix mortar admixture can be said to be the key to wet-mix mortar, which mainly plays the role of water reduction, thickening, water retention and retarding. Although the amount of admixture is small, it plays a great role and can significantly improve the performance of mortar. The mortar admixtures currently on the market can be mainly divided into two categories: plasticizers and open time regulators. The development time regulator is mainly used to adjust the working time and setting time of wet-mixed mortar. The role of the plasticizer is to adjust the workabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C08F220/56C08F220/06C08F228/02
CPCC04B40/0046C08F220/56C08F220/06C08F228/02C04B24/163C04B24/026C04B24/06C04B22/062
Inventor 黄永毅康净鑫陈阳义邵志恒陈吓敏
Owner 厦门路桥翔通建材科技有限公司
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