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Clay-resistant phosphonic acid-based super plasticizer and preparation method thereof

A superplasticizer and phosphonic acid-based technology, which is applied in the field of clay-resistant phosphonic acid-based superplasticizer and its preparation, can solve the problems of unoptimistic market prospects and high production costs, and achieve a simple and efficient synthesis process and low cost. , The effect of good adsorption and dispersion performance and water reduction performance

Active Publication Date: 2021-07-16
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these new types of small molecule water reducers all use expensive polyetheramine as raw materials, the production cost is high, and the market prospect is not optimistic.

Method used

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  • Clay-resistant phosphonic acid-based super plasticizer and preparation method thereof
  • Clay-resistant phosphonic acid-based super plasticizer and preparation method thereof
  • Clay-resistant phosphonic acid-based super plasticizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] For the esterified polyether, the synthesis initiator is methyl glycolate, the polymerized monomer is ethylene oxide, the concentration of the catalyst DMC is 30 ppm, and the amount of cocatalyst benzoic acid added is 0.1% of the mass of the methyl glycolate. Weigh 1 mol (90 g) of methyl glycolate, 20 mol (880 g) of ethylene oxide, 29 mg of catalyst DMC and 0.12 g of cocatalyst benzoic acid. Add the above-mentioned initiator methyl glycolate and catalyst into a closed reaction kettle, vacuumize to -0.1MPa, feed 20g of ethylene oxide, raise the temperature to 120°C to initiate the reaction and continue feeding the remaining ethylene oxide, keep warm After reacting for 1 hour, the volatile matter was removed under reduced pressure, and the insoluble matter was removed by filtration to obtain a carboxylate-modified polyether intermediate.

[0057] Add 1.01mol (60.7g) of ethylenediamine into the above reaction kettle containing carboxylate-modified polyether intermediate, s...

Embodiment 2

[0059] Esterified polyether, the synthesis initiator is ethyl glycolate, the polymerized monomers are ethylene oxide and propylene oxide, the concentration of catalyst DMC is 40ppm, and the addition of co-catalyst benzoic acid is 0.2% of the mass of ethyl glycolate. %. Weigh 1 mol (104 g) of ethyl glycolate, 25 mol (1100 g) of ethylene oxide, 20 mol (1160 g) of propylene oxide, 95 mg of catalyst DMC and 0.24 g of cocatalyst benzoic acid. Add the above-mentioned initiator ethyl glycolate and catalyst into a closed reaction kettle, evacuate to -0.1MPa, feed 20g of ethylene oxide, raise the temperature to 120°C to initiate the reaction, and continue to feed the remaining ethylene oxide and Propylene oxide, keep warm for 3 hours, remove volatile substances under reduced pressure, and remove insoluble substances by filtration to obtain a carboxylate-modified polyether intermediate.

[0060] Add 1.01mol (104.2g) of diethylenetriamine into the above-mentioned reaction kettle contain...

Embodiment 3

[0062] Esterified polyether, the synthesis initiator is methyl 3-hydroxypropionate, the polymerized monomers are ethylene oxide and cyclohexane oxide, the concentration of catalyst DMC is 40ppm, and the addition amount of co-catalyst benzoic acid is 3-hydroxy 0.3% of the mass of methyl propionate. Weigh 1 mol (104 g) of methyl 3-hydroxypropionate, 40 mol (1760 g) of ethylene oxide, 10 mol (981 g) of cyclohexane oxide, 114 mg of catalyst DMC and 0.36 g of cocatalyst benzoic acid. Add the above-mentioned initiator 3-hydroxypropionate methyl ester and the catalyst into the closed reaction kettle, vacuumize to -0.1MPa, pass in 20g of ethylene oxide, raise the temperature to 130°C to initiate the reaction and continue to pass in the remaining epoxy Ethane and epoxycyclohexane, heat preservation reaction for 3 hours, remove volatile substances under reduced pressure, and remove insoluble substances by filtration to obtain carboxylate modified polyether intermediate.

[0063] Add 1....

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Abstract

The invention discloses a clay-resistant phosphonic acid-based super plasticizer and a preparation method thereof. The clay-resistant phosphonic acid-based super plasticizer is obtained by carrying out an amidation reaction on the carboxylic ester modified polyether intermediate and an amination reagent to obtain a reaction product and then carrying out phosphonation reaction on the reaction product, phosphorous acid and an aldehyde monomer. The carboxylic ester modified polyether intermediate is formed by polymerizing a hydroxyl carboxylic ester compound and alkylene oxide. The clay-resistant phosphonic acid-based super plasticizer is high in monomer structure adjustability and high in cost performance, corrosive elements such as chloride ions cannot be generated in the preparation process, and the slump retaining performance, the retarding performance and the clay tolerance performance are excellent.

Description

technical field [0001] The invention belongs to the field of preparation of concrete admixtures, in particular to a clay-resistant phosphonic acid-based superplasticizer and a preparation method thereof. Background technique [0002] Concrete admixtures (also known as superplasticizers) refer to substances added to concrete to improve and adjust the performance of concrete. Concrete admixtures can regulate the rheological properties of concrete, improve mechanical properties and increase durability. Concrete admixture technology has become the core technology of modern concrete, and water reducing agent is one of the largest and most widely used concrete admixtures. [0003] As the third-generation high-performance water-reducer, the proportion of polycarboxylate-based water-reducers in engineering applications is also increasing. At present, its application has surpassed high-efficiency water-reducers such as naphthalene-based water-reducers, and has become a high-performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/338C08G65/327C08G65/331C08G65/333C08G65/28C04B24/24C04B103/32
CPCC08G65/338C08G65/327C08G65/331C08G65/33306C08G65/2609C08G65/269C08G65/2663C04B24/243C04B2103/32
Inventor 亓帅王涛杨勇冉千平王兵施展王方刚赵少鹏
Owner JIANGSU SOBUTE NEW MATERIALS
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