Unlock instant, AI-driven research and patent intelligence for your innovation.

Polycarboxylic acid water reducing agent based on humic acid polyether monomer and preparation method of polycarboxylic acid water reducing agent

A technology of acid-based polyether and polyether monomer, which is applied in the field of polycarboxylate water reducer based on humic acid-based polyether monomer and its preparation, can solve the problems of increasing humic acid polymerization activity and improve water solubility , Increase the activity of polymerization reaction and reduce the effect of economic loss

Active Publication Date: 2019-07-26
HAINAN TAIHOO TECH CO LTD
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of bleeding and segregation of polycarboxylate superplasticizers, the present invention uses humic acid as raw material, reacts with unsaturated polyoxyethylene ether through isocyanate as an overseas coupling agent, and introduces unsaturated double bonds into humic acid molecules to obtain humic acid. acid-based polyether monomer, thereby greatly increasing the polymerization activity of humic acid as a polymerizable monomer, and then using the prepared humic acid-based polyether monomer as a polymerizable monomer to undergo polymerization reactions with acrylic acid, polyoxyethylene ether, etc., to obtain Humic acid-based polycarboxylate superplasticizer, adjust the amount of humic acid-based polyether monomer to obtain humic acid-based polycarboxylate superplasticizers with different humic acid content

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polycarboxylic acid water reducing agent based on humic acid polyether monomer and preparation method of polycarboxylic acid water reducing agent
  • Polycarboxylic acid water reducing agent based on humic acid polyether monomer and preparation method of polycarboxylic acid water reducing agent
  • Polycarboxylic acid water reducing agent based on humic acid polyether monomer and preparation method of polycarboxylic acid water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] Preparation of humic acid-based polyether monomer:

[0034] Take 50g of humic acid and 30g of methallyl polyoxyethylene ether with a molecular weight of 2400 (TPEG2400) in 200mL of acetone solution, heat and stir at 60°C until the humic acid and TPEG2400 are completely dissolved, and then slowly add it dropwise to the above system Toluene diisocyanate (TDI) 2g, dropwise adding time 0.5h, stop reaction after 2h reaction, remove solvent acetone by rotary evaporation to obtain humic acid-based polyether monomer.

Embodiment 1

[0035] Embodiment 1: Preparation of humic acid-based polycarboxylate superplasticizer

[0036] Take 0.5g of the humic acid-based polyether monomer prepared above and 49.5g of methallyl polyoxyethylene ether (TPEG2400) in a two-necked flask filled with 50g of deionized water, heat and stir to 70°C and add 1g Ammonium persulfate initiator, continue heating and stirring for 5min, then dropwise add 10mL of acrylic acid aqueous solution containing 5.2g of acrylic acid, slowly add dropwise for 2h, continue to keep warm for 1h after the dropwise addition is completed, stop the reaction, and when the reaction solution cools to room temperature, use 30% NaOH solution to adjust the pH of the reaction solution to 6-7 to obtain a humic acid-based polycarboxylate superplasticizer.

Embodiment 2

[0037] Embodiment 2: Preparation of humic acid-based polycarboxylate superplasticizer

[0038]Take 5g of the humic acid-based polyether monomer prepared above and 45g of methallyl polyoxyethylene ether (TPEG2400) in a two-necked flask filled with 50g of deionized water, heat and stir to 70°C, and then add 1g of persulfuric acid Ammonium initiator, continue heating and stirring for 5min, then dropwise add 10mL of acrylic acid aqueous solution containing 4.8g of acrylic acid, slowly add dropwise for 2h, continue to keep warm for 1h after the dropwise addition is completed, stop the reaction, and when the reaction solution cools to room temperature, use 30wt% NaOH The solution adjusts the pH of the reaction solution to 6-7 to obtain a humic acid-based polycarboxylate water reducer.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of efficient concrete water reducing agents and discloses a polycarboxylic acid water reducing agent based on a humic acid polyether monomer and a preparation method of the polycarboxylic acid water reducing agent. The polycarboxylic acid water reducing agent is obtained through intiator polymerization of, by weight, 99-40 parts of unsaturated polyxylene ether, 1-60 parts of the humid acid polyether monomer and 5-25 parts of unsaturated acid. The humid acid polyether monomer is obtained by completely dissolving humid acid and unsaturated polyetherin the environment of organic solvent after heating and stirring at 50-70DEG C, and dripping a cross-linking agent diisocyanate for reaction for 2-3 hours prior to evaporating rotatably to remove thesolvent. The humid acid based polycarboxylic acid water reducing agent can control the amount of humid acid introduced into polycarboxylic acid, the obtained humid acid based polycarboxylic acid waterreducing agent has good dispersibility and rapidity, the dispersion stability of a cement system can be improved obviously, and the problem about water secretion and coagulation of polycarboxylic acid is solved.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency water reducers for concrete, in particular to a polycarboxylate water reducer based on humic acid-based polyether monomers and a preparation method thereof. Background technique [0002] Polycarboxylate high-performance water reducer has become the fifth largest building material in modern building materials, and its application in concrete production and engineering construction in my country is becoming more and more extensive and mature. Various polycarboxylate water reducer manufacturers have sprung up like mushrooms There are endless. However, polycarboxylate superplasticizers have disadvantages, such as poor resistance to soil, poor resistance to sulfate ions, bleeding and segregation at high dosages, and poor compatibility with other types of superplasticizers. At the same time, due to the increasing requirements for environmental protection, the continuous increase in the productio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B24/26C08F283/00C08F283/06C08F220/06C08G18/64C08G18/67C08G18/76C04B103/30
CPCC04B24/2694C04B2103/302C08F283/008C08F283/065C08G18/6492C08G18/6795C08G18/7614C08F220/06
Inventor 郑强
Owner HAINAN TAIHOO TECH CO LTD