Polymer for reducing viscosity of high-solid-content slurry and preparation method of polymer

A technology with high solid content and polymers, which is applied in the preparation of polymers and in the field of polymers. It can solve the problems of reducing plastic viscosity and high viscosity of high solid slurry, so as to reduce plastic viscosity, increase flow rate and plasticity, and solve viscosity problems. too high effect

Active Publication Date: 2021-10-08
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a polymer for reducing the viscosity of high solid slurry, which has good performance and can effectively reduce the plastic viscosity of Bingham fluids such as concrete and mortar, thereby solving the problem of high The problem of high viscosity of solid slurry

Method used

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  • Polymer for reducing viscosity of high-solid-content slurry and preparation method of polymer
  • Polymer for reducing viscosity of high-solid-content slurry and preparation method of polymer
  • Polymer for reducing viscosity of high-solid-content slurry and preparation method of polymer

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Embodiment 1

[0029] Embodiment 1: The preparation method of the polymer used to reduce the viscosity of high solid slurry according to the present invention comprises the following process steps: 1. 90 parts of macromonomer A, namely polyethylene glycol monomethyl ether (MPEG, poly The structural formula of ethylene glycol monomethyl ether (n=23, m=92) is dissolved in dichloromethane and placed in an ice-salt bath, and the mass ratio of macromonomer A to dichloromethane is 1:2. Slowly add 30 parts of halogenating agent i.e. phosphorus tribromide PBr 3 , when the dropwise addition is completed, the temperature is raised to 70°C, the reaction lasts for 2 hours, and when the end point of the reaction is reached, the reaction is terminated by cooling and adding ice water, and the solvent dichloromethane is removed by rotary evaporation at 30°C, and then freeze-dried to obtain the halide of monomer A That is, the bromide of MPEG; ②Dissolve 90 parts of bromide of MPEG in 750 parts of ethanol, th...

Embodiment 2

[0030] Embodiment 2: the preparation method of the polymer that is used to reduce the viscosity of high solid slurry according to the present invention comprises the following process steps: 1. 90 parts of macromonomer A are polyethylene glycol monomethyl ether (MPEG, n =50, m=140) was dissolved in dichloromethane and placed in an ice-salt bath, and the mass ratio of macromonomer A to dichloromethane was 1:2.5. Slowly add 30 parts of halogenating agent i.e. phosphorus tribromide PBr 3 , when the dropwise addition is completed, the temperature is raised to 70°C, the reaction lasts for 2 hours, and when the end point of the reaction is reached, the reaction is terminated by cooling and adding ice water, and the solvent dichloromethane is removed by rotary evaporation at 30°C, and then freeze-dried to obtain the halide of monomer A That is, the bromide of MPEG; ②Dissolve 90 parts of bromide of MPEG in 750 parts of ethanol, then place it in an ice-salt bath, add 140 parts of alkyl...

Embodiment 3

[0031] Embodiment 3: the preparation method of the polymer that is used to reduce the viscosity of high solid slurry according to the present invention comprises the following process steps: 1. 90 parts of macromonomer A are polyethylene glycol monomethyl ether (MPEG, n =90, m=150) was dissolved in dichloromethane and placed in an ice-salt bath, and the mass ratio of macromonomer A to dichloromethane was 1:3. Slowly add 30 parts of halogenating agent i.e. phosphorus tribromide PBr 3 , when the dropwise addition is completed, the temperature is raised to 70°C, the reaction lasts for 2 hours, and when the end point of the reaction is reached, the reaction is terminated by cooling and adding ice water, and the solvent dichloromethane is removed by rotary evaporation at 30°C, and then freeze-dried to obtain the halide of monomer A That is, the bromide of MPEG; ②Dissolve 90 parts of bromide of MPEG in 750 parts of ethanol, then place it in an ice-salt bath, add 140 parts of alkyldi...

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Abstract

The invention discloses a polymer for reducing the viscosity of high-solid-content slurry and a preparation method of the polymer. The invention provides a structural formula of the polymer. The preparation method comprises the steps of dissolving a macromonomer A, namely, polyethylene glycol monomethyl ether, in dichloromethane, placing in an ice salt bath, slowly dropwise adding a halogenating agent, heating, reacting, adding ice water to terminate the reaction, removing the solvent dichloromethane, and freeze-drying to obtain a halide of the monomer A; dissolving into ethanol, adding alkyl diamine, transferring into a high-pressure kettle, heating, reacting, terminating the reaction, recovering to room temperature, and evaporating, concentrating and drying to obtain a monomer B; and putting the monomer B into a reaction kettle, adding a phosphating agent and a catalyst p-toluenesulfonic acid, uniformly stirring, controlling the temperature, dropwise adding an aminomethylation reagent, heating, reacting, and adding NaOH to adjust the pH value, thereby obtaining the final product. The polymer is good in performance, the plastic viscosity of Bingham fluid such as concrete and mortar is effectively reduced, and the problem that the viscosity of high-solid-content slurry is too high is solved.

Description

technical field [0001] The invention relates to a polymer used for reducing the viscosity of high-solid slurry, and belongs to the technical field of building material chemical additives. The present invention also relates to a preparation method of the polymer used for reducing the viscosity of high-solid slurry. Background technique [0002] With the increasing emphasis on environmental protection, energy-saving and carbon-reducing life is being vigorously promoted. In response to the call, the concrete industry began to widely use high-performance concrete, and at the same time used fly ash, slag, etc. as auxiliary cementitious materials. In order to ensure that the strength of concrete would not decrease, it was often achieved by reducing the water-binder ratio. However, such a high-solid slurry often causes the viscosity of the concrete to rise, making it difficult to construct. Sometimes workers often reflect that even if the slump of high-strength concrete meets the...

Claims

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Application Information

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IPC IPC(8): C08G65/338C08G65/333C08G65/327C04B24/32
CPCC08G65/327C08G65/33306C08G65/338C04B24/32C04B2103/008Y02W30/91
Inventor 吴伟黄玉美刘昭洋王玉乾王进春田宇石雄松
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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