Allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method

A technology of polymer and methyl, which is applied in the field of polymer and its synthesis, can solve the problems of increasing the alkali content of concrete, corrosion of steel bars, and inconspicuous effect, and achieve the effect of simple synthesis process and strong functionality

Active Publication Date: 2015-04-22
LIAONING OXIRANCHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, construction defects in some concrete projects are not allowed to be repaired according to conventional methods under normal conditions, such as road surfaces, large bridges, tunnels, track subgrades, etc. Carry out road surface repair, or open traffic during the day and repair at night when conditions permit, while some special projects can only be repaired when the traffic volume is small, or within tens of minutes or hours during the driving interval. In the concrete embankment of the seaport wharf, it must be repaired within 2 to 3 hours of the ebb tide. In the above cases, special construction methods and fast-hardening and early-strength repairing materials must be used.
In addition, the concrete works at the wharf have been in the environment of sea water for a long time. In addition to the erosion of sea water, they are also continuously scoured by the external forces of waves. question
In railway and tunnel engineering, water seepage, water leakage and water erosion problems often occur. In addition to the necessary structural reinforcement, the above problems also require quick repairs to reduce unnecessary losses, cause waste of resources, and affect engineering functions. play
[0004] At present, allyl alcohol ether type or isoprenyl polyether polycarboxylate water reducer has been developed rapidly in China, and its performance is also high. However, in order to improve the early strength development of polycarboxylate type water reducer, existing methods It is still used to compound early-strength components
However, the early-strength component with good effect is usually used in the sulfonate water reducer, but the effect of using it in the polycarboxylate water reducer is not significant
The effect is not obvious when the dosage is small. When the dosage is large, it not only increases the production cost of concrete, but also may increase the alkali content of concrete, which has a negative effect on the durability of concrete.
Therefore, the method of compounding is not ideal

Method used

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  • Allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method
  • Allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method
  • Allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method

Examples

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Effect test

Synthetic example 1

[0054] Add 39.6 g of allyl sulfonic acid glycerol and 0.21 g of sodium hydroxide into the autoclave, perform nitrogen replacement three times, then heat up the autoclave and start stirring. When the temperature in the kettle reaches the initiation temperature, add 2g of ethylene oxide. After the temperature rises and the pressure drops, add 64g of ethylene oxide continuously and stably, control the reaction temperature at 120-140°C, and control the flow rate for 2 hours. . After the feeding is completed, the aging reaction is carried out for 30 to 50 minutes under constant temperature conditions. Until the pressure no longer drops, the reaction is completed, and the temperature is lowered. When the temperature in the reactor drops to 90°C, take out 70.4g of material, and then add 0.22g of sodium hydroxide to the remaining 35.2g of material in the reactor for nitrogen replacement. After three times, the temperature of the reactor was raised, and 74.8 g of ethylene oxide was co...

Synthetic example 2

[0056] 26.4 g of allyl sulfonic acid glycerol and 0.21 g of sodium hydroxide were added into the autoclave, and after nitrogen replacement three times, the temperature of the autoclave was raised and stirring was started. When the temperature in the kettle reaches the initiation temperature, add 2g of ethylene oxide. After the temperature rises and the pressure drops, add 77.2g of ethylene oxide continuously and stably, control the reaction temperature at 120-140°C, and control the flow rate for 2 hours Finish. After the feeding is completed, the aging reaction is carried out for 30 to 50 minutes under constant temperature conditions. Until the pressure no longer drops, the reaction is completed, and the temperature is lowered. When the temperature in the reactor drops to 90°C, take out 79g of material, and then add 0.22g of sodium hydroxide to the remaining 26.6g of material in the reactor, and replace it with nitrogen three times. Finally, the temperature of the reactor was...

Synthetic example 3

[0058] 26.4 g of allyl sulfonic acid glycerol and 0.21 g of sodium hydroxide were added into the autoclave, and after nitrogen replacement three times, the temperature of the autoclave was raised and stirring was started. When the temperature in the kettle reaches the initiation temperature, add 2g of ethylene oxide. After the temperature rises and the pressure drops, add 77.2g of ethylene oxide continuously and stably, control the reaction temperature at 120-140°C, and control the flow rate for 2 hours Finish. After the feeding is completed, the aging reaction is carried out for 30 to 50 minutes under constant temperature conditions. Until the pressure no longer drops, the reaction is completed, and the temperature is lowered. When the temperature in the reactor drops to 90°C, take out 79g of material, and then add 0.22g of sodium hydroxide to the remaining 26.6g of material in the reactor, and replace it with nitrogen three times. Finally, the temperature of the reactor was...

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Abstract

The invention provides an allyl sulfonic glycerin polyoxyethylene polyoxypropylene ether polycarboxylic acid water reducer and its synthesis method. Belonging to the field of concrete admixtures, the water reducer is a polymer of allyl sulfonic glycerin polyoxyethylene ether or allyl sulfonic glycerin polyoxypropylene ether (unit A) and unsaturated carboxylic acid and its derivative (unit B). According to the synthesis method provided in the invention, 500-6000 structural unit A is adopted as a polymerization monomer to undergo random free radical copolymerization in an aqueous system. Due to the introduction of a long chain of allyl sulfonic glycerin into a side chain, the water reducer has an early strength function, thus changing the mode of achieving an early strength effect only through compounding an early strength agent. Additionally, the water reducer provided in the invention has a simple synthesis process, good compatibility and good adaptability, and facilitates substantial improvement of the production efficiency and production benefits.

Description

technical field [0001] The present invention relates to a polymer and its synthesis method. More specifically, the present invention relates to an allylsulfonic acid glycerin polyoxyethylene polyoxypropylene ether polycarboxylate water reducer and its synthesis method. Background technique [0002] With the development of our country's national economy, concrete is the most used material in modern construction projects in our country. It is widely used in various water conservancy projects, road projects, industrial buildings, civil buildings and modern military projects. With the rapid growth of the national economy, the number of projects has increased, and the road mileage has doubled, higher requirements have been placed on the performance of cement concrete to meet the needs of different projects. [0003] However, construction defects in some concrete projects are not allowed to be repaired according to conventional methods under normal conditions, such as road surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F290/06C08F220/06C08F222/06C08F220/28C04B24/26C04B103/30
Inventor 朱建民刘兆斌董振鹏仲崇刚周立明田威
Owner LIAONING OXIRANCHEM INC
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