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Preparation method and application of a new type of anti-soil phosphoric acid-based superplasticizer

A superplasticizer, phosphoric acid-based technology, applied in the field of concrete admixtures

Active Publication Date: 2020-10-23
JIANGSU SOBUTE NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem of adaptability between concrete admixtures and materials and improve concrete slump loss, mechanical properties and durability, the present invention provides an , Synthetic method of novel phosphoric acid-based superplasticizer with excellent soil resistance

Method used

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  • Preparation method and application of a new type of anti-soil phosphoric acid-based superplasticizer
  • Preparation method and application of a new type of anti-soil phosphoric acid-based superplasticizer
  • Preparation method and application of a new type of anti-soil phosphoric acid-based superplasticizer

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Experimental program
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Effect test

Embodiment 1

[0055] For the branched polyether polyamine, the synthesis initiator is ethylenediamine, the polymerization monomer is ethylene oxide, and the addition amount of the catalyst NaH (wt60%) is 0.8% of the substance quality of the ethylenediamine. Weigh 0.1 mol (6.0 g) of ethylenediamine, 3 mol (132 g) of ethylene oxide, and 32 mg of catalyst NaH (60% by weight). Add the above-mentioned initiator ethylenediamine and catalyst into a closed reaction kettle, evacuate to -0.1MPa, feed 20g of ethylene oxide, raise the temperature to 110°C to initiate the reaction and continue to feed the remaining ethylene oxide, keep the temperature for the reaction After 1 h, the volatile substances were removed under reduced pressure to obtain a branched polyether polyamine intermediate.

[0056] Add the branched polyetheramine intermediate synthesized above, 0.22mol (20.35g) of epichlorohydrin, 0.0018mol (0.31g) of potassium sulfate, and 56g of solvent water into the reaction kettle, stir evenly, a...

Embodiment 2

[0058] For the branched polyether polyamine, the synthetic initiator is 1,3-propylenediamine, the polymerization monomer is ethylene oxide, and the catalyst sodium hydroxide is added in an amount of 1.5% of the 1,3-propylenediamine. Weigh 0.1 mol (7.4 g) of 1,3-propylenediamine, 10 mol (440 g) of ethylene oxide, and 60 mg of catalyst sodium hydroxide. Add the above-mentioned initiator 1,3-propylenediamine and catalyst into a closed reaction kettle, vacuumize to -0.1MPa, feed 20g of ethylene oxide, raise the temperature to 110°C to initiate the reaction and continue to feed the remaining ethylene oxide Alkanes, keep warm for 3 hours, remove volatile substances under reduced pressure, and obtain a branched polyether polyamine intermediate.

[0059] Add the branched polyetheramine intermediate synthesized above, 0.22mol (20.35g) of epichlorohydrin, 0.0019mol (0.33g) of potassium sulfate, and 201g of solvent water into the reaction kettle, stir evenly, and heat up to 50°C for 2 ho...

Embodiment 3

[0061] For the branched polyether polyamine, the synthesis initiator is 1,2-phenylenediamine, the polymerization monomer is propylene oxide, and the addition amount of catalyst Na is 1.6% of the mass of 1,2-phenylenediamine. Weigh 0.1 mol (10.8 g) of 1,2-phenylenediamine, 22 mol (1276 g) of propylene oxide, and 37 mg of catalyst Na. Add the above-mentioned initiator 1,2-phenylenediamine and the catalyst into a closed reactor, vacuumize to -0.1MPa, feed 20g of propylene oxide, raise the temperature to 130°C to initiate the reaction and continue feeding the remaining propylene oxide, After heat preservation for 6 hours, the volatile substances were removed under reduced pressure to obtain a branched polyether polyamine intermediate.

[0062] Add the branched polyetheramine intermediate synthesized above, 0.24mol (22.2g) of epichlorohydrin, 0.0024mol (0.42g) of potassium sulfate, and 643g of solvent water into the reaction kettle, stir evenly, and heat up to 70°C for 4 hours , t...

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Abstract

The invention discloses a preparation method of a novel anti-clay phosphate superplasticizer. The preparation method comprises steps as follows: (1) polyamine A and epoxyalkane are subjected to a ringopening polymerization reaction, and a branched polyether polyamine intermediate I is obtained; (2) the branched polyether polyamine intermediate I and epoxy chloropropane are subjected to a reaction, and an epoxypropyl ammonium chloride intermediate is obtained; (3) the epoxypropyl ammonium chloride intermediate and polyamine B react, and a branched polyether polyamine intermediate II is obtained; (4) the branched polyether polyamine intermediate II is taken as a substrate, a catalyst C, phosphorous acid and aldehyde monomers are added, the mixture reacts, and the phosphate superplasticizeris obtained. The prepared superplasticizer solves the problem about adaptability of current water reducers and clay, also has excellent retarding effect and slump retaining performance and improves the adaptability of various sand aggregates; raw materials selected in the process are low in cost, the reaction efficiency is advantageously improved, the reaction time is shortened and large-scale industrial production is realized.

Description

technical field [0001] The invention introduces a preparation method and application of a novel soil-resistant phosphoric acid cement dispersant, belonging to the technical field of concrete admixtures. Background technique [0002] Water reducer is a kind of water reducing agent that can reduce the mixing water consumption of concrete without affecting the fluidity of concrete, or increase the fluidity of concrete mixture without affecting the water consumption, that is, it has the function of reducing water and strengthening admixtures. [0003] Polycarboxylate superplasticizer is a high-performance superplasticizer whose molecular structure is mainly composed of polyether macromonomer and unsaturated carboxylic acid molecules through free radical polymerization. With the construction of large-scale infrastructure in the country, polycarboxylate superplasticizers are more and more widely used in concrete engineering. However, the raw material situation of modern concrete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C08G12/06C08G65/26C08G65/327C08G65/337C04B103/32
CPCC04B24/246C04B2103/32C08G12/06C08G65/2624C08G65/2627C08G65/2648C08G65/327C08G65/337C08G2650/30C08G2650/50
Inventor 冉千平亓帅王涛韩正范士敏马建峰王兵
Owner JIANGSU SOBUTE NEW MATERIALS
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