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A kind of clay inhibitor with retarding effect and preparation method thereof

A technology of clay inhibitor and retarding effect, applied in the direction of chemical recovery, etc., to achieve the effect of improving water retention and cohesion, regular structure, and inhibiting adsorption

Active Publication Date: 2020-06-30
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These are all conducive to the further realization of industrial production of ATRP, but the search found that there is no report on the preparation of clay inhibitors with retarding effect by using ARGET ATRP technology

Method used

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  • A kind of clay inhibitor with retarding effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of Star Initiator

[0023]Dissolve β-cyclodextrin (11.35g, 0.01mo) in 60mL of anhydrous N,N-dimethylformamide (DMF), add it to a 100mL three-necked flask, and then add triethylamine (7.07g, 0.07mol ) as a proton absorber. Stir in an ice-water bath for 0.5 h under nitrogen atmosphere. 2-Bromoisobutyryl bromide (16.1 g, 0.07 mol) was dissolved in 10 mL of anhydrous DMF, then added to a constant pressure dropping funnel, and added drop by drop into a three-necked flask. After the dropwise addition was completed, the reaction was carried out at room temperature for 24 h under nitrogen atmosphere. After the reaction, the reaction solution was filtered to remove salt, the filtrate was precipitated in absolute ethanol, filtered with suction, washed with absolute ethanol, and dried under vacuum at 50°C overnight to obtain a star initiator containing terminal bromine.

[0024] (2) Preparation of clay inhibitor

[0025] The star initiator (0.01mol) that step (...

Embodiment 2

[0027] In this example, the anti-mud agent ACP2 was prepared in the same manner as in Example 1, except that the amount of methacryloyloxyethyltrimethylammonium chloride in step (2) was 1.0 mol.

Embodiment 3

[0029] In this example, the anti-mud agent ACP3 was prepared in the same manner as in Example 1, except that the amount of methacryloyloxyethyltrimethylammonium chloride in step (2) was 1.5 mol.

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Abstract

The invention discloses a clay inhibitor with a delayed coagulation function and a preparation method of the clay adhesive. The clay inhibitor is a product of which the solid content is 40% and is prepared from a star-shaped initiator, methacryloyloxyethyl trimethyl ammonium chloride, an oxidant, a reducing agent and ligand through an ARGET ATRP reaction, wherein the mole ratio of the star-shaped initiator, the methacryloyloxyethyl trimethyl ammonium chloride, the oxidant and the reducing agent to the ligand is 1 to (10-200) to (0.01-0.1) to (0.5-4) to (0.01-0.5). The invention further discloses a preparation method of the inhibitor. A polymerization reaction is carried out at the room temperature, the sensitivity to oxygen is effectively degraded, and the amount of a catalyst is effectively reduced. When the initiator disclosed by the invention is compounded with an industrial polycarboxylate superplasticizer, the adaptability of the polycarboxylate superplasticizer to clay is effectively improved, and relatively high construction requirements are met.

Description

technical field [0001] The invention relates to a clay inhibitor and a preparation method thereof, in particular to a clay inhibitor with retarding effect and a preparation method thereof, and belongs to the technical field of concrete admixtures in building materials. Background technique [0002] Polycarboxylate superplasticizer has the advantages of low dosage, high water reducing rate, good slump retention performance, strong molecular structure adjustability, and high performance potential. It has become the third generation of high-performance concrete superplasticizer. However, polycarboxylate superplasticizers also face many technical difficulties in practical application, among which the high sensitivity to clay is the most prominent. In order to avoid the negative effects of high aggregate mud content on concrete, the commonly used solutions are to wash aggregates with high mud content or add superplasticizers in excess. However, the aggregate gradation will be da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C08F120/34C04B103/22
CPCC04B40/0039C04B2103/22C08F120/34C08F2438/01C04B24/38C04B24/12C04B24/00Y02P20/584
Inventor 唐新德杨月青赵春丽岳远倩扈有志潘义川张彩珠刘涛庞来学
Owner SHANDONG JIAOTONG UNIV
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