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Polycarboxylate superplasticizer with improved workability and encapsulation and preparation method thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of preparation of polycarboxylic acid water reducing agent, can solve the problems of complicated operation, cumbersome operation, complicated process, etc., and achieve simple production technology, improved workability, and easy operation. Effect

Active Publication Date: 2016-11-16
石家庄协耦化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The products prepared by the above prior art need to add expansion agent, anti-settling agent, defoamer, retarder, rust inhibitor and other components when used, and the operation is complicated
[0013] The technical solutions disclosed in the above-mentioned existing patent documents have the following problems to varying degrees: when polycarboxylate water reducers are used in engineering, additional components such as expansion agents, anti-settling agents, defoamers, retarders, and rust inhibitors need to be added , the operation is cumbersome and the process is complex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A polycarboxylate superplasticizer that improves workability and encapsulation, and is made of the following raw materials in parts by mass:

[0050] Water 750; Sodium oxide 12;

[0051] Among them, the monomer is prenol ether TPEG, and the polysaccharide containing rhamnose, hydroxyl and carboxyl in the molecular side chain is selected from plaster Wenlun glue.

[0052] The preparation method of the polycarboxylate water-reducer with improved workability and encapsulation comprises the following process steps:

[0053] (1) Preparation of material A: Dissolve the monomer in water; then make a solution of a polysaccharide containing rhamnose, hydroxyl and carboxyl in its molecular side chain and mix it evenly with the above monomer solution;

[0054] (2) Preparation of material B: put sodium hypophosphite, white powder 3, and vitamin C into water to dissolve in sequence;

[0055] (3) Mix material B and material A evenly;

[0056] (4) Preparation of material C: put so...

Embodiment 2

[0068] The polycarboxylate superplasticizer with improved workability and wrapping properties of this embodiment is made of the following raw materials in unit mass parts:

[0069] Water 782; Monomer 350; Molecular side chains containing rhamnose, hydroxyl and carboxyl polysaccharide 4; Sodium hypophosphite 4; Hanging white powder 4; Vitamin C 2; Sodium bisulfite 2.5; Acrylic acid 30; Hydrogen peroxide 7; Hydroxide sodium 10;

[0070] Among them, methallyl alcohol HPEG is selected as the monomer, and the polysaccharide with rhamnose, hydroxyl and carboxyl in the molecular side chain is selected from the paste Sanzan gum.

[0071] Step (2) preparation of B material in the preparation method of the present embodiment: sodium hypophosphite, hanging white powder 2.5, and vitamin C are successively put into water to dissolve;

[0072] (4) Preparation of material C: put sodium bisulfite and white powder 1.5 into water to dissolve in sequence;

[0073] All the other preparation met...

Embodiment 3

[0075] The polycarboxylate superplasticizer with improved workability and wrapping properties of this embodiment is made of the following raw materials in unit mass parts:

[0076] water 600; Sodium 9;

[0077] Among them, methoxypolyethylene glycol MPEG is selected as the monomer, and the polysaccharide containing rhamnose, hydroxyl and carboxyl in the molecular side chain is selected from the mixture of paste Wenlun glue: paste Dingyou gum with a mass-number ratio of 3:2.

[0078] Step (2) preparation of material B in the preparation method of the present embodiment: sodium hypophosphite, hanging white powder 2, and vitamin C are sequentially put into water to dissolve;

[0079] (4) Preparation of material C: put sodium bisulfite and white powder 1 into water to dissolve in sequence;

[0080] All the other preparation methods are the same as in Example 1.

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Abstract

The invention relates to preparation of polycarboxylate superplasticizer, in particular to polycarboxylate superplasticizer with improved workability and encapsulation and a preparation method thereof. An effective dose of monomers, polysaccharide with the molecule side chain containing rhamnose, hydroxide radical and carboxyl, sodium hypophosphite, sodium bisulfoxylate formaldehyde powder, vitamin C, sodium hydrogen sulfite, crylic acid, hydrogen peroxide and sodium hydroxide are dissolved in water and then subjected to blending, fed-batch blending and other steps, and then the polycarboxylate superplasticizer is obtained. The technical problems that in the prior art, during using, the process operation is complex are solved. The polycarboxylate superplasticizer has the advantages that the preparation process and a use method are simple, the polycarboxylate superplasticizer meets national standard requirements, and after being used, the polycarboxylate superplasticizer is good in workability and does not separate or bleed.

Description

technical field [0001] The invention relates to the preparation of a polycarboxylate water reducer, in particular to a polycarboxylate water reducer with improved workability and encapsulation and a preparation method thereof. Background technique [0002] With the implementation of the national ban on concrete, commercial concrete will surely enter a long period of development. From the first-tier to second-tier cities to the popularization of counties, the amount of concrete will increase rapidly. As a polycarboxylate superplasticizer used in concrete, it is the latest product of the third generation after lignosulfonate and naphthalene sulfonate formaldehyde condensate, and will have broad application and market prospects with the development trend of concrete . [0003] Polycarboxylate superplasticizer is a high molecular surfactant synthesized directly by grafting and copolymerizing organic chemical raw materials. It can not only adsorb on the surface of cement particl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/30
CPCC04B40/0039C04B2103/302C04B22/002C04B22/16C04B24/16C04B24/04C04B22/14C04B24/2641C04B22/068C04B22/062C04B24/32C04B24/38
Inventor 张镫鹤
Owner 石家庄协耦化学科技有限公司
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