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A polycarboxylate water reducer macromonomer terminal alkenyl ester structure double-tailed polyoxyethylene ether and its preparation method

A technology of double-tailed polyoxyethylene ether and terminal alkenyl ester is applied in the field of preparation of double-tailed polyoxyethylene ether with terminal alkenyl ester structure of polycarboxylate superplasticizer, which can solve the problem of single molecular structure and grafting. Simple and other problems, to achieve the effect of simple production process, easy control of conditions, and novel structure

Active Publication Date: 2017-08-25
GUIZHOU TIEJIANHENGFA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the active macromonomer is mainly grafted with a single polyoxyethylene chain branch, with a single molecular structure. Although there are many types of macromonomers on the market, their molecular structures are similar

Method used

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  • A polycarboxylate water reducer macromonomer terminal alkenyl ester structure double-tailed polyoxyethylene ether and its preparation method
  • A polycarboxylate water reducer macromonomer terminal alkenyl ester structure double-tailed polyoxyethylene ether and its preparation method
  • A polycarboxylate water reducer macromonomer terminal alkenyl ester structure double-tailed polyoxyethylene ether and its preparation method

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Effect test

Embodiment 1

[0016] A kind of preparation method of polycarboxylate superplasticizer macromonomer end alkenyl ester structure double tail polyoxyethylene ether, comprises the following steps:

[0017] (1) Add 133g (1mol) of iminodiacetic acid (1mol), 80g (2mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 50°C and stir to make it homogeneous Dissolve in water; then slowly add 142g (1mol) of glycidyl methacrylate dropwise, and drop evenly within 2 to 3 hours, keep stirring at 50°C for 2 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 0.5 mol / L.

[0018] (2) Add 1L (0.5mol) of the GMA-IDA solution obtained above, 2kg (1mol) of polyethylene glycol monomethyl ether with a molecular weight of 2000 and 1L of deionized water into the reactor, heat up to 30°C and stir to...

Embodiment 2

[0021] A kind of preparation method of polycarboxylate superplasticizer macromonomer end alkenyl ester structure double tail polyoxyethylene ether, comprises the following steps:

[0022] (1) Add 133g (1mol) of iminodiacetic acid (1mol), 80g (2mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 50°C and stir to make it homogeneous Dissolve in water; then slowly add 142g (1mol) of glycidyl methacrylate dropwise, and drop evenly within 2 to 3 hours, keep stirring at 50°C for 2 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 0.5 mol / L.

[0023] (2) Add 1L (0.5mol) of the GMA-IDA solution obtained above and 1kg (1mol) of polyethylene glycol monomethyl ether with a molecular weight of 1000 into the reactor, heat up to 25°C and stir to dissolve, then quickly...

Embodiment 3

[0026] A kind of preparation method of polycarboxylate superplasticizer macromonomer terminal alkenyl ester structure double tail polyoxyethylene ether, comprises the following steps:

[0027] (1) Add 266g (2mol) of iminodiacetic acid (2mol), 160g (4mol) of sodium hydroxide and 2L of deionized water into a three-neck round bottom flask equipped with a thermometer and an electric stirrer, raise the temperature to 65°C and stir to make it homogeneous Dissolve in water; then slowly add 284g (2mol) of glycidyl methacrylate dropwise, and drop evenly within 4~5 hours, keep stirring at 65°C for 3 hours after the dropwise addition, and obtain a transparent and uniform product after the reaction solution, the concentration of the reaction product GMA-IDA was 1 mol / L.

[0028] (2) Add 1L (1mol) of the above-obtained GMA-IDA solution, 1.5kg (2mol) of polyethylene glycol monomethyl ether with a molecular weight of 750 and 0.5L deionized water into the reactor, heat up to 25°C and stir to ...

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Abstract

The invention discloses bis-tail polyoxyethylene ether with a macromonomer allyl-terminated ester structure for a polycarboxylate superplasticizer and a preparation method of the bis-tail polyoxyethylene ether. The bis-tail polyoxyethylene ether is synthesized by two-step reactions of main raw materials of glycidyl methacrylate, iminodiacetic acid and methoxy polyethylene glycol and has the chemical formula shown in the description, wherein n is the average addition mole number of the oxyethylene group and represents any number from 10 to 100. The bis-tail polyoxyethylene ether is novel in structure, reasonable in design, simple and safe in manufacturing technology, and easily controllable in condition, and when the bis-tail polyoxyethylene ether serves as active function macromonomers of the polycarboxylate superplasticizer, dissolution can be omitted; meanwhile, when the bis-tail polyoxyethylene ether serves as active function macromonomers of the polycarboxylate superplasticizer, a novel slump-retaining polycarboxylic acid high-performance water reducer can be prepared to meet higher construction demands.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing a polycarboxylate water reducer macromonomer terminal alkenyl ester structure double-tailed polyoxyethylene ether. Background technique [0002] Polycarboxylate-based high-performance water-reducing agent has the advantages of low dosage, high water-reducing rate, good slump-retaining performance, and strong molecular structure adjustability. It has been widely used in key projects such as dams, bridges, tunnels, and high-speed rail. In modern concrete, polycarboxylate superplasticizer not only improves the working performance of concrete, but also improves the mechanical and durability properties of concrete. [0003] Polycarboxylate superplasticizer is an indispensable component in high-performance concrete. The relationship between its structure and performance has become the research and development direction of superplasticizers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/333
CPCC08G65/33396
Inventor 王毓刘成舟李本秀陈凯陈娟
Owner GUIZHOU TIEJIANHENGFA NEW MATERIAL TECH CO LTD
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