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Water reducing agent, preparation method thereof and maleic acid mono alkyl ester polyether

A technology of monoalkyl maleate and water reducing agent, applied in the field of polycarboxylate water reducing agent and monoalkyl maleate polyether, can solve the problem of large loss of concrete over time, poor cement adaptability, early strength To achieve the effect of high cost performance, good cement adaptability and high early strength

Active Publication Date: 2013-02-13
LIAONING KELONG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing polycarboxylate water reducers still have problems such as low water reducing rate, poor cement adaptability, large loss of concrete over time, poor early strength, and poor cost performance.

Method used

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  • Water reducing agent, preparation method thereof and maleic acid mono alkyl ester polyether
  • Water reducing agent, preparation method thereof and maleic acid mono alkyl ester polyether
  • Water reducing agent, preparation method thereof and maleic acid mono alkyl ester polyether

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preparation example Construction

[0026] The preparation method of polycarboxylate water reducer of the present invention comprises:

[0027] (1) make maleic acid or maleic anhydride and alkyl alcohol react to generate monoalkyl maleate;

[0028] (2) make the monoalkyl maleate of gained react with epoxide, generate monoalkyl maleate polyether;

[0029] (3) React monoalkyl maleate polyether with unsaturated acid or unsaturated acid anhydride to obtain a water reducer.

[0030] In a preferred embodiment of the method of the present invention, the alkyl alcohol described in step (1) is an alkyl alcohol with 1-12 carbon atoms; more preferably an alkyl alcohol with 1-8 carbon atoms; More preferably, it is an alkyl alcohol having 1 to 6 carbon atoms. Most preferably, the alkyl alcohol is isopropanol.

[0031] The molar ratio of maleic acid or maleic anhydride to alkyl alcohol is preferably 0.9:1 to 1:0.9, particularly preferably 0.95 to 0.99:1.

[0032] The reaction in step (1) is preferably carried out in the p...

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Abstract

The invention relates to a water reducing agent, a preparation method thereof and maleic acid mono alkyl ester polyether. The water reducing agent has the following structure, wherein teach symbol is defined as the specification. The invention further relates to a preparation method of the water reducing agent and a midbody.

Description

technical field [0001] The present invention relates to a water reducer, its preparation method and a monoalkyl maleate polyether; specifically, to a polycarboxylate water reducer, its preparation method and a monoalkyl maleate Polyether. Background technique [0002] Water reducing agent can improve the working performance of concrete, improve the physical and mechanical properties and durability of hardened concrete, and is one of the important products in the new building materials industry. The water reducer can be divided into naphthalene sulfonate formaldehyde condensate water reducer, melamine sulfonate formaldehyde condensate water reducer, p-aminobenzenesulfonic acid formaldehyde condensate water reducer and polycarboxylate water reducer etc. Among them, compared with the first three water reducers, polycarboxylate water reducers have the properties of diversity and controllability in molecular structure design. However, the existing polycarboxylate water reducers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C08G65/332C08G65/28C04B103/30
CPCC04B24/267C04B2103/302
Inventor 姜艳金凤龙季春伟
Owner LIAONING KELONG FINE CHEM