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Hyperbranched polymer, hyperbranched type water reducing agent of polycarboxylic acid series and preparation method and application thereof

A technology of hyperbranched polymer and hyperbranched polymer, which is applied in the field of hyperbranched polymer and hyperbranched carboxylic acid-based water reducing agent, can solve the problems of poor cement adaptability, low water reducing rate and the like, and achieves Superior performance, strong frost resistance and high water reduction rate

Active Publication Date: 2012-02-08
江苏超力建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polycarboxylate-based concrete high-performance water-reducing agent is a research hotspot in the world in recent years. It has low dosage, high water-reducing rate, small slump loss, can increase the dosage of fly ash and slag, has no pollution, and saves cement. and other advantages, but the polycarboxylate superplasticizers in our market generally have problems such as poor adaptability to various cements, so the modification of polycarboxylate superplasticizers is imperative

Method used

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  • Hyperbranched polymer, hyperbranched type water reducing agent of polycarboxylic acid series and preparation method and application thereof
  • Hyperbranched polymer, hyperbranched type water reducing agent of polycarboxylic acid series and preparation method and application thereof
  • Hyperbranched polymer, hyperbranched type water reducing agent of polycarboxylic acid series and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Using a magnetic stirrer and water bath heating and a three-necked flask with a nitrogen inlet and a condenser, add 17.2g methyl acrylate, 6.1g ethanolamine and 10ml methanol, stir the mixture at room temperature for 30min and then heat up to 40°C for 10h , and then the methanol was removed by rotary evaporation to obtain a colorless transparent oil, N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester monomer. Add 1.041g malonic acid and 4.665g N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester, 10mL toluene, 15mL N-N dimethyl Acetamide (DMAc) and 0.028g p-toluenesulfonic acid, add 20mL toluene to the water trap. The mixture was reacted in a boiling state for 7 h, and then the toluene and DMAc were distilled off under reduced pressure to obtain a light yellow oily product, which was the first-generation ester-terminated hyperbranched poly(amine-ester). Continue to add 9.33g of N-hydroxyethyl-3-amino-N,N-dipropionate methyl ester monomer and 0.04g of p-phenyl...

Embodiment 2

[0053] Using a magnetic stirrer and water bath heating and a three-necked flask with a nitrogen inlet and a condenser tube, add 17.2g methyl acrylate, 6.1g ethanolamine and 10ml methanol, and the mixture is stirred at room temperature and nitrogen for 20-30min and then heated to 40- Keep at 50°C for 8-10h, then remove the methanol by rotary evaporation to obtain a colorless transparent oil, N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester monomer. Add 1.041g malonic acid and 4.665g N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester, 10mL toluene, 15mL N-N dimethyl Acetamide (DMAc) and 0.028g p-toluenesulfonic acid, add 20mL toluene to the water trap. The mixture was reacted in a boiling state for 5-7h, and then the toluene and DMAc were distilled off under reduced pressure to obtain a light yellow oily product, which was the first-generation ester-terminated hyperbranched poly(amine-ester). Continue to add 9.33g of N-hydroxyethyl-3-amino-N,N-methyl dipropionate ...

Embodiment 3

[0055] Using a magnetic stirrer and water bath heating and a three-necked flask with a nitrogen inlet and a condenser, add 17.2g methyl acrylate, 6.1g ethanolamine and 10ml methanol, stir the mixture at room temperature for 30min and then heat up to 40°C for 10h , and then the methanol was removed by rotary evaporation to obtain a colorless transparent oil, N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester monomer. Add 1.041g malonic acid and 4.665g N-hydroxyethyl-3-amino-N,N-dipropionic acid methyl ester, 10mL toluene, 15mL N-N dimethyl Acetamide (DMAc) and 0.028g p-toluenesulfonic acid, add 20mL toluene to the water trap. The mixture was reacted in a boiling state for 7 h, and then the toluene and DMAc were distilled off under reduced pressure to obtain a light yellow oily product, which was the first-generation ester-terminated hyperbranched poly(amine-ester). Continue to add 9.33g of N-hydroxyethyl-3-amino-N,N-dipropionate methyl ester monomer and 0.04g of p-phenyl...

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Abstract

The invention provides a hyperbranched polymer and a preparation method thereof, wherein the preparation method comprises the steps of taking methyl acrylate, ethanolamine, 2-bromoethanol and propandioic acid as raw materials to synthesize a hyperbranched poly (amine-ester) nuclear molecule comprising a bromine terminal group; taking cuprous bromide and 2,2-bipyridyl as a catalyst and a coordinating agent; respectively grafting acrylic acid and single methyl oxygen radical sealed allyl polyethylene glycol into the hyperbranched poly (amine-ester) comprising bromine terminal group by means of an atom transfer radical polymerization method so as to obtain a hyperbranched polymer. The invention further provides a hyperbranched type water reducing agent of polycarboxylic acid series mainly comprising the hyperbranched polymer and the application thereof, wherein the water reducing agent improves the faults of existing water reducing agent of which the adding quantity is large and the cement adaptability is bad and the like,. and has the advantages that the adding quantity is low, the water reducing efficiency is high, the loss of slump is less, the compatibility to the cement is good,the frozen resistance is strong and the like, the properties of the product are stable, and the water reducing agent has no tendency of layering and precipitating and has no toxicity and pollution after storing for a long time.

Description

technical field [0001] The invention relates to a hyperbranched polymer and a hyperbranched carboxylic acid-based water reducer as well as a preparation method and application thereof, and belongs to the technical field of concrete admixtures in chemical building materials. Background technique [0002] As we all know, in the operation of cement mixture, in order to make the operation labor-saving and effective, and to release the mold early to shorten the construction period, the cement mixture is required to have high fluidity, effectively suppress the loss of slump, and have sufficient early strength at the initial stage of hardening. This requires a high-performance concrete water reducer. The high-efficiency water-reducing agent has a high dispersion effect on cement and concrete, and can better maintain the slump of the concrete. The high-efficiency water-reducing agent has a strong dispersion of cement particles, a high water-reducing rate, and a good early-strength e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F285/00C04B24/26C04B103/30
Inventor 寿崇琦徐磊林栋杨文刘冰蒋大庆
Owner 江苏超力建材科技有限公司
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