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Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer

A technology of early-strength polycarboxylate and strong polycarboxylate, which is applied in the field of ultra-early-strength polycarboxylate water reducer and its preparation, can solve the problems of unsatisfactory concrete construction performance, poor mud resistance, and large loss of concrete slump. problems, to achieve the effect of accelerating water reconciliation, increasing water reduction rate, and reducing adsorption

Active Publication Date: 2016-01-27
GUANGDONG REDWALL NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity and diversity of concrete raw materials in my country, especially when the soil content of sand and gravel is large, the slump loss of concrete is large. The polycarboxylate water reducer produced by TPEG, due to the connection between the PEG side chain and the soil Intercalation reaction makes it poor in mud resistance and cannot meet the requirements of concrete construction performance

Method used

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  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer
  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer
  • Polycarboxylate superplasticizer with super high early strength and preparation method of polycarboxylate superplasticizer

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Experimental program
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Embodiment 1

[0049] A kind of embodiment of the preparation method of active macromonomer described in the present invention:

[0050] 1), the synthesis of active intermediates

[0051] Inject 5 mol of prenyl alcohol, 5 g of sodium hydride, 25 mol of ethylene oxide, and 5 mol of epichlorohydrin into a closed autoclave, stir, and react at 80° C. for 10 h to obtain the active intermediate of the reaction product.

[0052] 2) Synthesis of active macromers

[0053] Add 1 mol of triethylamine and 0.001 mol of hydroquinone into the flask, raise the temperature to 10°C, slowly add dropwise the triethylamine solution containing 5 mol of the active intermediate synthesized in step (1), after the dropwise addition, at 10°C Next, continue the incubation reaction for 10h to obtain the active macromonomer.

Embodiment 2

[0055] A kind of embodiment of the preparation method of cationic quaternary ammonium salt PEO active macromer of the present invention:

[0056] 1), the synthesis of active intermediates

[0057] Inject 5 mol of isobutenyl alcohol, 20 g of sodium hydride, 500 mol of ethylene oxide, 250 mol of propylene oxide, and 750 mol of epibromohydrin into a closed autoclave, stir, and react at 150°C for 2 hours to obtain the active intermediate of the reaction product.

[0058] 2) Synthesis of active macromers

[0059] Add 3 mol of trimethylamine and 0.004 mol of hydroquinone into the flask, raise the temperature to 30°C, slowly add dropwise the trimethylamine solution containing 5 mol of the active intermediate synthesized in step (1), after the dropwise addition, at 30°C, Continue the insulation reaction for 10h to obtain the active macromonomer.

Embodiment 3

[0061] A kind of embodiment of the preparation method of active macromonomer described in the present invention:

[0062] 1), the synthesis of active intermediates

[0063] Inject 5 mol allyl alcohol, 10 g sodium hydride, 1000 mol ethylene oxide, and 400 mol epoxy iodopropane into a closed autoclave, stir, and react at 100°C for 6 hours to obtain the active intermediate of the reaction product.

[0064] 2) Synthesis of active macromers

[0065] Add 5 mol of tripropylamine and 0.0015 mol of hydroquinone into the flask, heat up to 50°C, slowly add dropwise the tripropylamine solution containing 5mol of the active intermediate synthesized in step (1), after the dropwise addition, at 50°C, Continue the heat preservation reaction for 8h to obtain the active macromonomer.

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Abstract

The invention provides a polycarboxylate superplasticizer with super high early strength. The polycarboxylate superplasticizer with super high early strength is a compound shown in the formula (I) and is synthesized with an active macromonomer as the raw material, cations are introduced into molecules while the steric hindrance effect of the superplasticizer is further improved, the cations have good soil resistance, so that the water-reducing rate of the superplasticizer is increased, and the soil resistance and the cement adaptability of the superplasticizer are improved. The polycarboxylate superplasticizer has better tolerance for soil and does not have an intercalation reaction with the soil. The cations of the polycarboxylate superplasticizer with super high early strength can inhibit soil expansion, so that admixture adsorption by the soil is reduced. The polycarboxylate superplasticizer with super high early strength can accelerate hydration of cement and has the super high early strength function. The polycarboxylate superplasticizer with super high early strength has super high early strength and soil resistance functions when applied to common concrete.

Description

technical field [0001] The invention relates to a water reducer, in particular to a super early strength polycarboxylate water reducer and a preparation method thereof. Background technique [0002] In recent years, the research and production of concrete admixtures have tended to develop in the direction of high performance and no pollution. Concrete water reducer is the most widely used and most used concrete admixture. Water reducing agent mixed into fresh concrete can destroy the flocculation structure of cement particles, play a role in dispersing cement particles and cement hydration particles, thereby releasing free water in the flocculation structure and increasing the fluidity of concrete mixture . PCEs superplasticizers are anionic surfactants, which are mixed into cement paste, adsorbed on the surface of cement particles with cations, and dissociate into organic anion groups with hydrophilic and lipophilic effects. [0003] The molecular skeleton of the superpla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C08F283/06C08F220/06C08F222/02C08F222/06C08G65/28C04B103/30
Inventor 张小富赵利华白淑英
Owner GUANGDONG REDWALL NEW MATERIALS
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