Early strength type ether polycarboxylate superplasticizer and preparation method thereof

A technology of ether polycarboxylic acid and water reducer, which is applied in the field of building materials, can solve the problems of difficult control of the reaction process, unfavorable environmental protection, and long time consumption, and achieve high free radical polymerization conversion rate, small slump loss, and early The effect of excellent strength

Active Publication Date: 2015-06-10
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, ester monomers can only be produced through high-temperature esterification. At the same time, water-carrying agents must be used, water separation devices and reflux devices, and vacuum distillation to remove solvents. This requires high equipment requirements and high processing costs. And the water-carrying agent itself has cons

Method used

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  • Early strength type ether polycarboxylate superplasticizer and preparation method thereof
  • Early strength type ether polycarboxylate superplasticizer and preparation method thereof
  • Early strength type ether polycarboxylate superplasticizer and preparation method thereof

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preparation example Construction

[0056] The preparation method of early-strength ether polycarboxylate water reducer is characterized in that it comprises the following steps:

[0057] (1) By parts by weight, the prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 27, the prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 113, 2- Add acrylamido-2-methyl-1-propanesulfonic acid and deionized water into the three-necked flask, heat and start the stirrer to dissolve;

[0058] (2) Chain transfer agent and initiator are dissolved in 40 parts of deionized water in parts by weight;

[0059] (3) Acrylic acid is added into 35 parts of deionized water to dissolve in parts by weight;

[0060] (4) After the temperature of the reactor rises to 38-42°C and the isopentenol polyethylene glycol monomethyl ether macromonomer is dissolved, a constant flow pump is used to drop the mixed solution of chain transfer agent and initiator 2-3 H...

Embodiment 1

[0073] Such as figure 1 As shown, the polycarboxylate superplasticizer with early strength function can be preferably made of the following raw materials in parts by weight:

[0074] 24 parts of prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a degree of polymerization of 27, 50 parts of prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a degree of polymerization of 113, 6.5 parts of acrylic acid, chain transfer 0.3 parts of agent, 0.58 parts of initiator, 2.8 parts of 2-acrylamido-2-methyl-1-propanesulfonic acid, and 125 parts of deionized water. Wherein, the chain transfer agent is mercaptopropionic acid; the initiator is a combination of hydrogen peroxide and vitamin C, and in 0.49 parts of the initiator, hydrogen peroxide accounts for 0.4 part, and vitamin C accounts for 0.09 part.

[0075] The deionized water includes deionized water X, deionized water Y and deionized water Z. The parts by weight of deionized water X used to dis...

Embodiment 2

[0079] Such as figure 2 As shown, the polycarboxylate water reducer with early strength function can also be preferably made of the following raw materials in parts by weight:

[0080] 20 parts of prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a degree of polymerization of 27, 60 parts of prenyl alcohol polyethylene glycol monomethyl ether macromonomer with a degree of polymerization of 113, 7.6 parts of acrylic acid, chain transfer 1.2 parts of agent, 0.48 parts of initiator, 2.5 parts of 2-acrylamido-2-methyl-1-propanesulfonic acid, and 135 parts of deionized water. Wherein, the chain transfer agent is sodium methallylsulfonate; the initiator is ammonium persulfate.

[0081] The deionized water includes deionized water X, deionized water Y and deionized water Z. The parts by weight of deionized water X used to dissolve polyoxyethylene ether macromonomers and 2-acrylamido-2-methyl-1-propanesulfonic acid are 60 parts for dissolving initiators and chai...

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Abstract

The invention discloses an early strength type ether polycarboxylate superplasticizer and a preparation method thereof, and relates to the technical field of building materials. The superplasticizer is prepared from the following raw materials in parts by weight: 20-30 parts of an isopentenol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 27, 50-60 parts of an isopentenol polyethylene glycol monomethyl ether macromonomer with a polymerization degree of 113, 6.5-8.6 parts of acrylic acid or a derivative monomer thereof, 0.3-1.5 parts of a chain transfer agent, 0.4-0.6 part of an initiator, 2.5-3.5 parts of 2-acrylamido-2-methyl-1-propane sulfonic acid and 125-135 parts of deionized water. The early strength type ether polycarboxylate superplasticizer disclosed by the invention has the beneficial effects of small doping amount, remarkable early strength effect, high water reduction rate, small slump loss, environmental protection, smaller molecular weight distribution and higher free radical polymerization conversion rate, and the early strength of concrete prepared by a synthetic sample of the early strength type ether polycarboxylate superplasticizer disclosed by the invention is better than that of the concrete using a common superplasticizer.

Description

Technical field: [0001] The invention relates to the technical field of building materials, in particular to a polycarboxylate water reducer with early strength function and a preparation method thereof. Background technique: [0002] In recent years, with the rapid development of high-performance concrete, the research on concrete admixtures has been unprecedentedly active. Ordinary polycarboxylate superplasticizers will delay cement hydration, especially under low temperature conditions, and the early strength development is slow, which limits the use of ordinary polycarboxylate superplasticizers. In prefabricated components and emergency repair projects, etc., in order to increase production efficiency and speed up construction progress, polycarboxylate superplasticizers are not only required to have a good water-reducing and dispersing effect, but also to be able to improve the early strength of concrete. [0003] At present, the commonly used method of early-strength p...

Claims

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Application Information

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IPC IPC(8): C04B24/16C08F291/06C08F220/06C08F220/36C04B103/30
Inventor 刘昭洋王进春叶子何俊淅康静杨晓峰董树强刘江涛王龙飞
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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