Ether-ester copolymerized polycarboxylic acid water reducer and preparation method thereof

A technology of polycarboxylic acid and water reducing agent, which is applied in the field of concrete admixtures, can solve problems such as affecting project quality, strong adaptability, and sensitivity to water addition, and achieves the effects of wide adaptability, strong adaptability and good adaptability.

Inactive Publication Date: 2018-02-13
上海高铁化学建材有限公司
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual application process, there are also some problems, such as too fast loss of slump, poor adaptability, sensitivity to water addition, etc., which restrict the application of polycarboxylate water reducer to a certain extent, and also affect the quality of the project.
[0003] Generally speaking, ether-based water-reducing agents have a high water-reducing rate, but their molecular structure is single and cannot be combined with various molecular structures, so their adaptability is not strong

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
  • Ether-ester copolymerized polycarboxylic acid water reducer and preparation method thereof
  • Ether-ester copolymerized polycarboxylic acid water reducer and preparation method thereof
  • Ether-ester copolymerized polycarboxylic acid water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1:

[0023] Add 300g water, 200g methacrylic alcohol polyoxyethylene ether (HPEG2400), 100g methoxypolyoxyethylene ether methacrylate (MPEG1000), 10.0g maleic anhydride and 2.0g hydrogen peroxide into a 1000m1 round-bottom three-necked flask as Reaction bottom solution.

[0024] Prepare solution A: 18.0g acrylic acid, 1.5g acrylamide, 1.5g mercaptopropionic acid and 40g water are mixed and placed in a dropping funnel.

[0025] Prepare B solution: mix 0.5g vitamin C and 60g water in the dropping funnel.

[0026] Stir until the monomer in the flask is dissolved, and the temperature is raised to 60℃. Immediately start to add liquid A and B at the same time. The A solution is dripped at the same time in 3.0 hours, and the B solution is dripped in 3.5 hours. After the reaction is kept for 1 hour, add 7.5g32 % Sodium hydroxide solution, adjust the pH of the solution to 6-7, make up water to obtain 40% ether ester copolymerized polycarboxylic acid water reducing agent mother ...

Example Embodiment

[0027] Example 2:

[0028] Add 300g of water, 150g of methacrylic alcohol polyoxyethylene ether (HPEG2400), 150g of methoxypolyoxyethylene ether methacrylate (MPEG1200), 12g of maleic anhydride and as the reaction bottom liquid into a 1000m1 round-bottomed three-necked flask. 2.0g ammonium persulfate and 1.0g hydrogen peroxide.

[0029] Prepare solution A: mix 15g acrylic acid, 3.0g 2-acrylamide-2-methylpropanesulfonic acid (AMPS), 2.0g mercaptopropionic acid and 30g water in a dropping funnel.

[0030] Preparation of B solution: mix 0.8 g of white lumps and 60 g of water and place them in a dropping bottle.

[0031] Stir until the monomer in the flask is dissolved, and the temperature is raised to 40°C. Immediately start to add liquid A and B at the same time. Liquid A will be dripped in 3.0 hours, and liquid B will be dripped in 3.5 hours. After the reaction is maintained for 1 hour, add 8.0g 32% Adjust the pH of the solution to 6-7, and make up water to obtain 40% ether ester copo...

Example Embodiment

[0032] Example 3:

[0033] Add 300g water, 180g prenol polyoxyethylene ether (TPEG2400), 120g methoxy polyoxyethylene ether methacrylate (MPEG1000), 12g fumaric acid, 3.0g amine persulfate into a 1000m1 round bottom three-necked flask As the reaction bottom liquid.

[0034] Prepare solution A: 18g itaconic acid, 3g N-N dimethylacrylamide, 1.5g mercaptopropionic acid and 40g water are mixed and placed in a dropping funnel.

[0035] Preparation of B solution: mix 0.2g of white block, 0.4g of vitamin C and 60g of water and place them in the dropping flask funnel.

[0036] Stir until the monomer in the flask is dissolved, and the temperature is raised to 50°C. Immediately start to add liquid A and liquid B at the same time. Liquid A will be dripped in 3.0 hours, and liquid B will be dripped in 3.5 hours. After the reaction is maintained for 1 hour, add 8.0g 32% Adjust the pH of the solution to 6-7, and make up water to obtain 40% ether ester copolymerized polycarboxylic acid water reduci...

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 discloses an ether-ester copolymerized polycarboxylic acid water reducer and a preparation method thereof. The method comprises the following steps: putting water, an ester polyether macromer, an ether polyether macromer and a fourth monomer (organic carboxylic acid) into a reaction kettle, and performing stirring until the materials are dissolved; adding an oxidant, performing heating, and dripping prepared liquid A and liquid B at the same time; after heat preservation, adjusting the pH value; and supplementing water until the solid content is 40%, thereby obtaining the ether-ester copolymerized polycarboxylic acid water reducer. The ether-ester copolymerized polycarboxylic acid water reducer provided by the invention copolymerizes an ether side chain and an ester side chain in a polymer, and perfectly combines the high water reducing property of an ether polycarboxylic acid water reducer with the high adaptability of an ester polycarboxylic acid water reducer, therebyobtaining a polycarboxylic acid water reducer with wide and strong adaptability, simple process and excellent performance. The polycarboxylic acid water reducer has good adaptability to different cement and good adaptability to sand and gravel materials with poor quality.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to an ether-ester copolymerized polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is the third generation of high-performance concrete admixture, which has the advantages of low dosage, good dispersion, and large degree of freedom in molecular structure. It has been widely used in various concrete projects and achieved good results. . However, in the actual application process, there are also some problems, such as too fast loss of slump, poor adaptability, sensitivity to water addition, etc., which restrict the application of polycarboxylate water reducer to a certain extent, and also affect the quality of the project. . [0003] Generally speaking, ether-based water-reducing agents have a high water-reducing rate, but their molecular structure is single and cannot be combined wit...

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): C08F283/06C08F220/06C08F220/56C08F220/58C08F222/02C08F220/54C04B24/16C04B24/26C04B103/30
CPCC08F283/065C04B24/165C04B24/2694C04B2103/0059C04B2103/302C08F220/06C08F222/02
Inventor 王建全
Owner 上海高铁化学建材有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap