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A kind of polyether ester modified polyether water reducing agent and preparation method thereof

The technology of a water reducing agent and allyl polyoxyethylene ether is applied in the field of polyetherester modified polyether water reducing agent and its preparation, which can solve the problems of difficult water removal, difficult control of the reaction process and high water reduction rate.

Active Publication Date: 2020-11-20
清远市德诚化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction process of the method provided by this patent is difficult to control, and it is also difficult to remove water. In addition, the bleeding property is not mentioned
Polypropylene alcohol ether: maleic anhydride: sodium methacrylate: acrylamide: 2-hydroxyethyl acrylate: initiator: water = 25-40: 3-6: 1-6: 0.5-4: 1-5:0.5-4:100, the water reducing agent has small slump loss and high water reducing rate, but its slump level is not high, and dehydration is more difficult

Method used

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  • A kind of polyether ester modified polyether water reducing agent and preparation method thereof
  • A kind of polyether ester modified polyether water reducing agent and preparation method thereof
  • A kind of polyether ester modified polyether water reducing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Step 1, polymerization section, add allyl polyoxyethylene ether, methoxy polyethylene glycol maleate, 2-acryloyl-2-methylpropanesulfonic acid to the reactor, mix to form a mixed solution I , heat, then add oxidizing agent, then, dropwise add the mixed solution II composed of acrylic acid, chain transfer agent and reducing agent, after the dropwise addition, keep it warm for 1-3 hours, then add alkali neutralizer to neutralize, and get a water content of 30 -40% water reducer solution;

[0042] Step 2, dehydration section, input the water reducer solution in step 1 into the supergravity dehydration equipment for dehydration for 0.5-5 hours, and obtain a water reducer with a solid content of more than 90%.

[0043] Preferably, the heating temperature in step one is 50-90°C, and the heat preservation temperature in step one is 60-90°C.

[0044] Add water, HPEG, methoxypolyethylene glycol maleate, and 2-acryloyl-2-methylpropanesulfonic acid into a reactor with a stirrer, s...

Embodiment 2

[0046] Other conditions are the same as in Example 1, except that hydroxy silicone oil with a weight ratio of 0.5:150 to allyl polyoxyethylene ether is added during the preparation of the mixed liquid I.

Embodiment 3

[0048] Other conditions are the same as in Example 1, except that a hydroxyl silicone oil with a weight ratio of 1:150 to allyl polyoxyethylene ether is added during the preparation of the mixed liquid I.

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Abstract

The invention provides a waterless water reducing agent and a preparation method thereof. An allyl ether macromonomer and an ether ester macromonomer are simultaneously used raw materials to prepare the waterless water reducing agent, the respective advantages of the influence of a hydrophilic olefin polymerization monomer and a hydrophobic ester monomer on the strength and the water segregation amount of the water reducing agent are combined, compared with single use of the allyl ether macromonomer, by combination of the allyl ether macromonomer and the ether ester macromonomer, the dehydration is easier. At the same time, super-gravity dewatering equipment adapted to the composition of the water reducing agent is used for dehydration. The water reducing agent produced by the method has high dehydration rate, is convenient for storage and transportation, and is not easy to agglomerate during storage. Further, it is unexpectedly found that the water reducing agent produced by the method has a small change in slump through time when used in concrete.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a polyether ester modified polyether water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. [0003] Polyether water reducer and polycarboxylate water reducer are more common types of water reducer in recent years. Among them, the raw materials used for polycarboxylate superplasticizer are generally prepared from unsaturated carboxylic acids, polyoxyolefins, unsaturated carboxylic acid esters, and unsaturated monomers containing sulfonic acid groups. CN1800076A discloses an acrylic multi-polymer copolymer high-efficiency water reducer, which contains: 100 parts of acrylic acid or its derivatives, 150-450 parts of polyoxyalkenes, 10-80 parts of sulfonic acid derivatives, deionized water solvent 450 to 800 part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/58C08F4/40C04B24/26C04B103/30
CPCC04B24/2658C04B2103/302C08F4/40C08F283/065C08F220/06
Inventor 李开军陈建君张均李帅
Owner 清远市德诚化工科技有限公司