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

A kind of preparation method of hyperbranched solid polycarboxylate water reducer

A technology of polycarboxylic acid and water reducing agent, applied in the field of concrete admixtures, can solve the problems of high preparation cost, high energy consumption, environmental pollution, etc., achieve good dispersibility and dispersibility retention ability, improve fluidity retention, The effect of lowering the reaction temperature

Active Publication Date: 2022-07-29
JINAN URBAN CONSTR GRP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid polycarboxylate water-reducer prepared by the invention has excellent water-reducing dispersion effect and dispersibility retention ability, but the use of organic solvent to remove it not only increases the production cost, but also easily causes environmental pollution
[0009] At present, the preparation of solid polycarboxylate superplasticizers has the problems of high preparation cost, difficult access to raw materials, and high energy consumption. At the same time, the subsequent processing of the prepared polycarboxylate superplasticizers is relatively cumbersome.

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
  • A kind of preparation method of hyperbranched solid polycarboxylate water reducer
  • A kind of preparation method of hyperbranched solid polycarboxylate water reducer
  • A kind of preparation method of hyperbranched solid polycarboxylate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, as figure 1 shown,

[0041]A preparation method of a hyperbranched solid polycarboxylate water reducer, characterized in that: the hyperbranched solid polycarboxylate water reducer is prepared from the following components: polyether macromonomer, small monomer solution, chain A transfer agent, an amine reducing agent with a double bond, and a neutralizing agent; the total mass is 1000 parts, and the preparation method comprises the following steps:

[0042] (1) 856 parts of allyl polyoxyethylene ether was added to the three-necked flask, the temperature was raised to 55°C, and stirring was started to melt the macromonomer completely.

[0043] (2) After the macromonomer is completely melted, measure the temperature in the flask, control the temperature at 40°C, and add 8 parts of hydrogen peroxide as an oxidant after the temperature is stable.

[0044] (3) After 10 minutes, the small monomer solution and the amine reducing agent with double bonds were added...

Embodiment 2

[0047] A preparation method of a hyperbranched solid polycarboxylate water reducer, characterized in that: the hyperbranched solid polycarboxylate water reducer is prepared from the following components: polyether macromonomer, small monomer solution, chain A transfer agent, an amine reducing agent with a double bond, and a neutralizing agent; the total mass is 1000 parts, and the preparation method comprises the following steps:

[0048] (1) 828 parts of methallyl polyoxyethylene ether was added to the three-necked flask, the temperature was raised to 60°C, and stirring was started to melt the macromonomer completely.

[0049] (2) After the macromonomer is completely melted, measure the temperature in the flask, control the temperature at 45°C, and add 22 parts of benzoyl peroxide as an oxidant after the temperature is stable.

[0050] (3) After 10 minutes, the small monomer solution and the amine reducing agent with double bonds were added dropwise. The small monomer solutio...

Embodiment 3

[0053] A preparation method of a hyperbranched solid polycarboxylate water reducer, characterized in that: the hyperbranched solid polycarboxylate water reducer is prepared from the following components: polyether macromonomer, small monomer solution, chain A transfer agent, an amine reducing agent with a double bond, and a neutralizing agent; the total mass is 1000 parts, and the preparation method comprises the following steps:

[0054] (1) Add 820 parts of vinylbutyl ether polyoxyethylene ether into the three-necked flask, heat up to 40°C, and turn on stirring to completely melt the macromonomer.

[0055] (2) After the macromonomer is completely melted, measure the temperature in the flask, control the temperature at 35°C, and add 13 parts of oxidizing agent dodecanoyl peroxide after the temperature is stable.

[0056] (3) After 10 minutes, the small monomer solution and the amine reducing agent with double bonds were added dropwise. The dropwise addition time of the small ...

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 relates to the technical field of concrete admixtures, in particular to a preparation method of a hyperbranched solid polycarboxylate water reducer. Oxidant; S3, after adding the oxidant for 10 minutes, the small monomer solution and the amine reducing agent with double bonds are added dropwise; S4, after the dropwise addition is completed, heat preservation and aging, add the neutralizer after the aging, and use the condensed chip after the reaction is completed. The machine can be cured and sliced. The invention is energy-saving and environmentally friendly; it can avoid the phenomenon of automatic acceleration in the middle and later stages of the reaction, increase of the molecular weight of the reactants, local agglomeration and even gel effect; the process is simple, no organic solvent is used, and it can be applied after the reaction is completed by cooling and pulverizing; Good dispersibility and dispersibility retention.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a preparation method of a hyperbranched solid polycarboxylate water reducer. Background technique [0002] Polycarboxylate superplasticizers (PCEs) show strong designability in molecular structure, and high-performance superplasticizers can be obtained by adjusting and optimizing the main chain length, side chain length and functional groups. Therefore, to address some of the problems that arise in concrete science and engineering, researchers have focused on the structural design of PCE macromolecules. With the diversification of the molecular structure of superplasticizers, some PCEs with branched structures have attracted attention due to their unique properties and potential applications. Compared with the conventional polycarboxylate water reducer, this hyperbranched water reducer has better dispersibility and dispersibility retention ability. [0003] The prio...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/20C08F220/34C08F228/02C08F222/02C08F220/14C08F220/60C04B24/26C04B24/16C04B103/30
CPCC08F283/065C04B24/2694C04B24/165C04B2103/302C08F220/06C08F220/20C08F220/34C08F228/02C08F222/02C08F220/14C08F220/60
Inventor 许庚刘昆明单坤山孙晓辉刘玮琦张鹏张梦杰董平升
Owner JINAN URBAN CONSTR GRP