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Aromatic polyether monomer, special phenolic aldehyde main chain structure water reducing agent derived from same and preparation methods thereof

A technology of polyether monomer and main chain structure, applied in the field of aromatic polyether monomer, can solve the problems of high viscosity, limited strength improvement and poor adaptability of water reducing agent, and achieve low viscosity, water reducing performance and slump retention. Good performance, the effect of improving early strength and final setting strength

Active Publication Date: 2018-06-01
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the disadvantages of high viscosity, high cost, poor adaptability, and limited strength improvement of the prepared water reducer.

Method used

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  • Aromatic polyether monomer, special phenolic aldehyde main chain structure water reducing agent derived from same and preparation methods thereof
  • Aromatic polyether monomer, special phenolic aldehyde main chain structure water reducing agent derived from same and preparation methods thereof
  • Aromatic polyether monomer, special phenolic aldehyde main chain structure water reducing agent derived from same and preparation methods thereof

Examples

Experimental program
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preparation example Construction

[0047] In a specific embodiment, the application provides a kind of preparation method of high molecular weight polyether monomer, it comprises the following steps:

[0048] (1) initiator is mixed with catalyst to obtain mixture 1;

[0049] (2) The resulting mixture 1, ethylene oxide and propylene oxide are mixed for ring-opening polymerization;

[0050] (3) maturation, get final product;

[0051] The initiator is one or more of phenol, ethylene glycol phenyl ether, p-cresol and p-cresyl glycol ether.

[0052] In the present application, the catalyst is conventional in the art, preferably one or more of alkali metals, alkali metal hydroxides, alkaline earth metal hydroxides and alkali metal oxides; more preferably potassium hydroxide , sodium hydroxide, potassium methylate, sodium methylate and sodium metal in one or more.

[0053] In the present application, the initiator: catalyst: ethylene oxide: the parts by weight of propylene oxide are preferably (90-140): (1-5): (244...

Embodiment 1

[0087] The raw material formula that present embodiment adopts is as follows:

[0088] Preparation:

[0089]

[0090] Mix the initiator and catalyst, vacuum inhale the ethoxylation device, turn on the canned pump, then raise the temperature to 100°C, and vacuum dehydrate for 2 hours. =1:1) At the same time, gradually add epoxide and mature for 2 hours. During the whole reaction process, the pressure of the reaction system is controlled at 0.1-0.4MPa; then cool down to 75°C and add neutralizing agent acetic acid, and stir evenly.

[0091] The hydroxyl value of the high molecular weight polyether monomer prepared in this example is 11.12 mgKOH / g.

Embodiment 2

[0093] The raw material formula that present embodiment adopts is as follows:

[0094] Preparation:

[0095]

[0096] Mix the initiator and catalyst, vacuum inhale the ethoxylation device, turn on the canned pump, then raise the temperature to 105°C, and vacuum dehydrate for 2 hours. =1:1) At the same time, gradually add epoxide and mature for 2 hours. During the whole reaction process, the pressure of the reaction system is controlled at 0.1-0.4MPa; then cool down to 78°C and add neutralizing agent acetic acid, and stir evenly.

[0097] The hydroxyl value of the high molecular weight polyether monomer prepared in this example is 11.25 mgKOH / g.

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Abstract

The invention relates to an aromatic polyether monomer, a preparation method of the aromatic polyether monomer, a special phenolic aldehyde main chain structure water reducing agent derived from the aromatic polyether monomer and a preparation method of the special phenolic aldehyde main chain structure water reducing agent derived from the aromatic polyether monomer. The aromatic polyether monomer, the special phenolic aldehyde main chain structure water reducing agent derived from the aromatic polyether monomer and the preparation methods have the benefits that the HLB value of the polyethermonomer can be adjusted as required, the prepared water reducing agent has low viscosity and good water reducing performance and slump loss resistance, and early strength and final setting strength of concrete can be significantly improved.

Description

technical field [0001] This application relates to the technical field of water reducers. Specifically, the application relates to an aromatic polyether monomer, a preparation method of the aromatic polyether monomer, a special phenolic main chain structure water reducer derived from an aromatic polyether monomer, and the preparation of an aromatic polyether monomer derived from The method of the special phenolic main chain structure water reducing agent of family polyether monomer. Background technique [0002] The types of superplasticizers mainly include aliphatic superplasticizers, sulfamate superplasticizers, modified lignosulfonate superplasticizers, naphthalene superplasticizers and polycarboxylate superplasticizers. agent, and polycarboxylate superplasticizer is the largest amount in the world today. The synthesis equipment and method of polycarboxylate superplasticizer are simple, low energy consumption (normal temperature process can be used), and the most widely...

Claims

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Application Information

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IPC IPC(8): C08G65/331C08G65/28C08G65/26C04B24/32C04B103/30
CPCC04B24/32C04B2103/302C08G65/2627C08G65/331
Inventor 涂天平杜辉罗琼赵鑫翟立杰董建国
Owner SHANGHAI DONGDA CHEM
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