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Polycarboxylic acid water reducing agent using diallyl polyethylene glycol (DAPEG) as raw material and preparation method thereof

A technology of polyethylene glycol ether and bisallyl, which is applied in the field of polycarboxylate water reducer, can solve the problems of no patent report, etc., and achieve improved water reduction effect, good slump retention, and good water reduction effect Effect

Active Publication Date: 2011-03-30
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly provides a kind of novel polyethylene glycol ether monomer-diallyl polyethylene glycol ether (DAPEG), utilizes this novel diallyl polyethylene glycol ether (DAPEG) and maleic anhydride then (MA), sodium allyl sulfonate (SAS) or sodium methallyl sulfonate (MSAS) to prepare a new type of polycarboxylate water reducer, currently there is no relevant patent report in China

Method used

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  • Polycarboxylic acid water reducing agent using diallyl polyethylene glycol (DAPEG) as raw material and preparation method thereof
  • Polycarboxylic acid water reducing agent using diallyl polyethylene glycol (DAPEG) as raw material and preparation method thereof
  • Polycarboxylic acid water reducing agent using diallyl polyethylene glycol (DAPEG) as raw material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Preparation of Diallyl Polyethylene Glycol Ether (DAPEG)

[0027] Add 200g polyethylene glycol (PEG200), 7g potassium hydroxide, 7g tetrabutylammonium bromide (TBAB) and appropriate amount of tetrahydrofuran in the reaction still equipped with stirrer, condensing device, drying device, nitrogen protection, then slowly Drop 150 g of allyl chloride and react at 40°C for 2 hours. After the reaction, remove the solvent and unreacted allyl chloride under reduced pressure to obtain the crude product. The crude product was dissolved in a mixed solvent of ethyl acetate and butyl acetate, and washed three times with saturated sodium chloride solution. Then dry and distill off the solvent under reduced pressure to obtain bisallyl polyethylene glycol ether (DAPEG300).

[0028] (2) Preparation of a new type of polycarboxylate water reducer using diallyl polyethylene glycol ether (DAPEG) as raw material

[0029] Add 300g Diallyl Polyethylene Glycol Ether (DAPEG300), 200g Malei...

Embodiment 2

[0031] (1) Preparation of Diallyl Polyethylene Glycol Ether (DAPEG)

[0032] Add 300g polyethylene glycol (PEG300), 10g potassium hydroxide, 20g tetrabutylammonium bromide (TBAB) and appropriate amount of tetrahydrofuran in the reactor equipped with stirrer, condensing device and drying device, nitrogen protection, and then slowly Drop 150 g of allyl chloride and react at 40°C for 3 hours. After the reaction, remove the solvent and unreacted allyl chloride under reduced pressure to obtain the crude product. The crude product was dissolved in a mixed solvent of ethyl acetate and butyl acetate, and washed three times with saturated sodium chloride solution. Then dry and distill off the solvent under reduced pressure to obtain bisallyl polyethylene glycol ether (DAPEG400).

[0033] (2) Preparation of a new type of polycarboxylate water reducer using diallyl polyethylene glycol ether (DAPEG) as raw material

[0034] 400g Diallyl Polyethylene Glycol Ether (DAPEG400), 200g Maleic An...

Embodiment 3

[0036] (1) Preparation of Diallyl Polyethylene Glycol Ether (DAPEG)

[0037] Add 400g polyethylene glycol (PEG400), 8g potassium hydroxide, 12g tetrabutylammonium bromide (TBAB) and appropriate amount of tetrahydrofuran in the reactor that is equipped with stirrer, condensing device, drying device, logical nitrogen protection, then slowly Drop 160 g of allyl chloride, react at 50°C for 3 hours, remove the solvent and unreacted allyl chloride under reduced pressure after the reaction, and obtain the crude product. The crude product was dissolved in a mixed solvent of ethyl acetate and butyl acetate, and washed three times with saturated sodium chloride solution. Then dry and distill off the solvent under reduced pressure to obtain bisallyl polyethylene glycol ether (DAPEG500).

[0038] (2) Preparation of a new type of polycarboxylate water reducer using diallyl polyethylene glycol ether (DAPEG) as raw material

[0039] 500g Diallyl Polyethylene Glycol Ether (DAPEG500), 200g M...

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Abstract

The invention belongs to the technical field of concrete additives and in particular relates to preparation of macromonomer-diallyl polyethylene glycol (DAPEG) and a novel polycarboxylic acid water reducing agent prepared by using DAPEG as a raw material. The water reducing agent is prepared by carrying out heating reaction on the DAPEG, maleic anhydride (MA), sodium allyl sulfonate (SAS) or methyl sodium allyl sulfonate (MSAS), ammonium persulfate (APS), sodium hydroxide and water according to proper mass proportion by using nitrogen as shielding gas. In the invention, the polycarboxylic acid serial water reducing agent is prepared from the DAPEG for the first time, thus the variety of the polycarboxylic acid serial water reducing agent is enriched; and meanwhile, the prepared polycarboxylic acid serial water reducing agent has favorable performance, such as low doping amount, high water reducing rate, no delayed coagulation, low slump loss, and the like, thereby having more favorable market prospect and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of polycarboxylate water reducer, and in particular relates to the preparation of a diallyl polyethylene glycol ether (DAPEG) and the preparation of a novel polycarboxylate water reducer using it as a raw material. Background technique [0002] The water reducing agent used in concrete can reduce the water required for cement hardening, has a strong dispersion effect on cement, makes the physical structure of concrete more uniform after solidification, and improves the strength of concrete. Traditional high-efficiency water reducers such as naphthalene sulfonate formaldehyde condensate and melamine sulfonate formaldehyde condensate can no longer meet the requirements of concrete construction and sustainable development due to large changes in slump and environmental pollution in the production process. Foreign countries began to develop high-performance water reducer-the third-generation polycarboxylate wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B24/32C08F228/02C08F216/12C08F290/06C08G65/48C04B103/30
CPCC04B24/2641
Inventor 李因文赵洪义朱化雨
Owner 安徽海螺材料科技股份有限公司
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