Early-strength-type polycarboxylate water reducer and preparation method thereof

A polycarboxylic acid and early-strength technology, which is applied in the field of early-strength polycarboxylate water-reducing agent and its preparation, can solve the problems of maintaining the early strength of the water-reducing agent, unfavorable early strength of the water-reducing agent, etc., and achieves the slump Small loss, improved turnover rate of engineering operations, and small shrinkage ratio

Inactive Publication Date: 2019-08-16
上饶市天佳新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For example, the patent application number 2013106924668 discloses a polycarboxylate water reducer. Although the patent uses a dual initiation system (i.e., an initiation system in which an oxidant-reductant and an azo initiator are combined), its The azo initiator used and the need to add a strong base for neutralization are not conducive to the early strength of the superplasticizer
The patent application number 2014106751220 also discloses a non-pyrogenic plastic-retaining polycarboxylate high-performance water reducer, but the reaction system of aconitic acid and ethyl aconitate used in it cannot make the early stage of the water reducer The strength is maintained at a relatively excellent level

Method used

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  • Early-strength-type polycarboxylate water reducer and preparation method thereof
  • Early-strength-type polycarboxylate water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Get the following raw materials: by weight, 420 parts of isopentenyl polyoxyethylene ether (weight average molecular weight 5000), 2.7 parts of ammonium persulfate, 2 parts of mercaptopropionic acid, 18 parts of acrylic acid, 3 parts of sodium acrylate sulfonate , 5 parts of 2-acrylamide-2-methylpropanesulfonic acid, 0.8 parts of acrylic amine, 3 parts of maleic anhydride, 0.4 parts of sodium hypophosphite, 0.3 parts of hanging white block, 70 parts of triethanolamine, deionized water 540 copies;

[0042] Material A: a solution made of sodium hypophosphite, diacid, mercaptopropionic acid and deionized water;

[0043] Material B: a solution made of acrylic acid, sodium propionate sulfonate, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and deionized water;

[0044]Add the measured deionized water into the reaction kettle, turn on the stirring rod, and then put the measured isopentenyl polyoxyethylene ether, maleic anhydride, and ammonium persulfate into the reac...

Embodiment 2

[0049] Get the following raw materials: by weight, 440 parts of methallyl polyoxyethylene ether (weight average molecular weight 5000), 3 parts of hydrogen peroxide, 1.5 parts of mercaptopropanol, 15 parts of acrylic acid, 5 parts of sodium acrylate sulfonate, 3 parts of 2-acrylamide-2-methylpropanesulfonic acid, 1.5 parts of acrylic amine, 5 parts of maleic anhydride, 0.2 part of sodium hypophosphite, 0.1 part of hanging white block, 100 parts of triisopropanolamine, to 500 parts of ionized water;

[0050] Material A: a solution made of sodium hypophosphite, white block, mercaptopropanol and deionized water;

[0051] Material B: a solution made of acrylic acid, sodium propionate sulfonate, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and deionized water;

[0052] Add the measured deionized water into the reaction kettle, turn on the stirring rod, and then put the measured methallyl polyoxyethylene ether, maleic anhydride, and hydrogen peroxide into the reaction kett...

Embodiment 3

[0057] Get the following raw materials: by weight, 430 parts of the mixture of methallyl polyoxyethylene ether and isopentenyl polyoxyethylene ether (weight average molecular weight 6000), 2.95 parts of ammonium persulfate, 1.55 parts of mercaptopropionic acid 17 parts of acrylic acid, 4 parts of sodium acrylic acid sulfonate, 3 parts of 2-acrylamide-2-methylpropanesulfonic acid, 1 part of acrylic acid amine, 4 parts of maleic anhydride, 0.3 parts of sodium hypophosphite, hanging white 0.3 parts of block, 90 parts of triisopropanolamine, 530 parts of deionized water;

[0058] Material A: a solution made of sodium hypophosphite, white block, mercaptopropanol and deionized water;

[0059] Material B: a solution made of acrylic acid, sodium propionate sulfonate, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and deionized water;

[0060] Add the measured deionized water into the reaction kettle, turn on the stirring rod, and then put the measured methallyl polyoxyethylene...

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Abstract

The invention provides an early strength type polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is mainly prepared from the following raw materials, by weight, 420 to 440 parts of unsaturated polyoxyalkylene ether monomer with weight-average molecular weight of more than 5000, 2.7 to 3 parts of oxidant, 0.3 to 0.7 part of a reducing agent, 3 to5 parts of unsaturated anhydride monomer, 1.5 to 2 parts of a chain transfer agent, 500 to 540 parts of water, 70 to 100 parts of alcohol amine organic material, and unsaturated monocarboxylic acid and derivative monomer thereof. The alcohol amine organic material is at least one of triethanolamine, triisopropanolamine, diethanol monoisopropanolamine and ethylenediamine. Based on the oxidant-reductant initiation system in the formula, strong alkali does not need to be added into the whole system for neutralization instead of the alcohol amine organic material; after specific combination of polymer monomers with large molecular weight, unsaturated acid anhydride monomers and other substances is adopted, the early strength of the concrete is remarkably improved.

Description

technical field [0001] The invention relates to the field of preparation of polycarboxylate high-performance water reducer, in particular to an early-strength polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate-based water-reducing agent is the latest generation of concrete water-reducing agent, which has the characteristics of low dosage and high water-reducing rate. It has been widely used in high-performance concrete, such as high-strength concrete, high-flow concrete and self-compacting concrete. In recent years, with the rapid development of polycarboxylate water reducer, it has been promoted and applied in many major projects, and now it has gradually been popularized in the field of concrete engineering. [0003] For example, the patent application number 2013106924668 discloses a polycarboxylate water reducer. Although the patent uses a dual initiation system (i.e., an initiation system in which an oxidant-re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F220/58C08F222/06C08F228/02C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F283/065C08F220/06
Inventor 王昌祥童炳丰皮岳提周磊吴玉霞
Owner 上饶市天佳新型材料有限公司
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