Unsaturated polyether monomer, preparation method and application of unsaturated polyether monomer, and polymer prepared thereby

A polyether monomer, unsaturated technology, applied in the field of unsaturated polyether monomer and its preparation method, application and prepared polymer, can solve the problem of low polymerization activity, poor concrete retention performance, polyether monomer Single structure and other issues to achieve the effect of improving retention performance

Active Publication Date: 2017-11-28
联泓(江苏)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of unsaturated polyether monomer for synthesizing polycarboxylate water reducer and its preparation method and application, to solve the single structure of polyether monomer in the prior art, low polymerization activity, concrete retention performance Not good enough to meet the actual needs of concrete transportation, construction and material quality changes

Method used

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  • Unsaturated polyether monomer, preparation method and application of unsaturated polyether monomer, and polymer prepared thereby
  • Unsaturated polyether monomer, preparation method and application of unsaturated polyether monomer, and polymer prepared thereby
  • Unsaturated polyether monomer, preparation method and application of unsaturated polyether monomer, and polymer prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Under the protection of nitrogen, put 215 parts of dimethyl allyl alcohol in the reaction flask, add 0.45 parts of NaH powder, stir and raise the temperature to 90 ° C, then slowly drop 233 parts of butyl glycidyl ether into the reaction flask, control The reaction temperature is about 90°C, the dropwise addition time is 120 minutes, after the dropwise addition is completed, the temperature is kept for 2 hours, and the intermediate (1-1#) is obtained after cooling.

[0062] Add 416 parts of the above-mentioned intermediate (1-1#) to the reaction kettle, add 7.0 parts of NaH powder, stir and raise the temperature to 120°C under vacuum conditions, and slowly feed 970 parts of ethylene oxide into the reaction kettle to carry out For polymerization reaction, maintain the temperature at about 120°C and keep the pressure relatively constant at about 0.4MPa until all the ethylene oxide is added into the reactor and keep it warm for about 1 hour. Material, the intermediate (1-2...

Embodiment 2

[0066] Put 300 parts of dimethyl allyl alcohol in a three-neck flask equipped with a nitrogen protection device, a thermometer and a stirrer, add 4.5 parts of NaH powder, quickly replace nitrogen, turn on the heating, stir and heat up to 100 ° C, and then add Slowly add 744 parts of butyl glycidyl ether dropwise at a medium speed, control the reaction temperature at 100°C, and add dropwise for 180 minutes. After the dropwise addition, keep warm for 2 hours and cool to obtain the intermediate (2-1#).

[0067] Add 500 parts of the above-mentioned intermediate (2-1#) to the high-pressure reactor, and replace it with nitrogen. Then, under stirring, the reactor is evacuated, and the heating is turned on. Polymerize 993 parts of ethylene oxide, maintain the temperature at 120°C, and keep the pressure relatively constant at about 0.3 MPa until all the ethylene oxide is added into the reactor and keep it warm for about 1 hour until the pressure of the reactor no longer drops. After va...

Embodiment 3

[0071]Put 403 parts of dimethyl allyl alcohol in a three-necked flask equipped with a nitrogen protection device, a thermometer and a stirrer, add 3.4 parts of NaH powder, quickly replace nitrogen, turn on the heating, stir and heat up to 100 ° C, and then add Slowly add 325 parts of butyl glycidyl ether dropwise at a medium speed, control the reaction temperature at 100°C, and add dropwise for 180 minutes. After the dropwise addition, keep warm for 2 hours, and cool to obtain the intermediate (3-1#).

[0072] Then add 360 parts of the above-mentioned intermediate to the high-pressure reactor, add 1.3 parts of sodium hydride, and carry out nitrogen replacement. Then, under stirring, vacuumize the reactor, turn on the heating, and start slowly to the reactor after the temperature rises to 120°C. Add 6375 parts of ethylene oxide to carry out the polymerization reaction, maintain the temperature at 120°C, and keep the pressure relatively constant at about 0.4 MPa, until all the et...

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Abstract

The invention relates to the technical field of concrete admixtures and in particular relates to an unsaturated polyether monomer, a preparation method and application of the unsaturated polyether monomer, and a polymer prepared thereby. According to the structural design of introducing glycidyl ether into hydrophobic blocks, a certain amount of hydrophobic units and hydrophobic groups are introduced and controlled in a carboxylic copolymer molecular structure, so that the viscidity of a cement-based material is reduced under the action of a water reducing agent, and the dispersion property of the water reducing agent and slump retaining performance are improved. The unsaturated polyether monomer disclosed by the invention comprises multiple polymerization units, and has high double bond retention rate and excellent polymerization activity; by controlling the reaction conditions, the main chain and side chains of the product can be subjected to accurate design at different positions and lengths, so that the prepared water reducing agent is rich in product structure and is slightly influenced by factors such as high-temperature environment change, material quality fluctuation and the like, the concrete workability and high slump retaining performance are maintained, and convenience is brought to production and transportation and construction control.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an unsaturated polyether monomer and its preparation method, application and prepared polymer. Background technique [0002] Concrete water reducer is the most widely used and most widely used additive in concrete admixtures. In recent years, the research and production of concrete admixtures have tended to develop in the direction of high performance, green environmental protection, and pollution-free. The polycarboxylate water reducer with a comb-shaped molecular structure is a high-performance water reducer, because of its high water reducing rate, good slump retention performance, low dosage, no pollution, low retardation, low air-entrained, The production process is easy to operate, low cost and other excellent performance, suitable for the preparation of high-strength, ultra-high-strength, high fluidity and self-compacting concrete, has become a hot field of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F228/02C08G65/28C04B24/16C04B103/30
Inventor 朱军成黄海李华威李方
Owner 联泓(江苏)新材料研究院有限公司
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